{"id":28732,"date":"2025-10-30T21:02:31","date_gmt":"2025-10-30T21:02:31","guid":{"rendered":"https:\/\/vividscience.org\/?page_id=28732"},"modified":"2025-10-31T05:40:42","modified_gmt":"2025-10-31T05:40:42","slug":"tidal-zones","status":"publish","type":"page","link":"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/tidal-zones\/","title":{"rendered":"6a2 Tidal Zones"},"content":{"rendered":"<!--themify_builder_content-->\n<div id=\"themify_builder_content-28732\" data-postid=\"28732\" class=\"themify_builder_content themify_builder_content-28732 themify_builder tf_clear\">\n                    <div  data-css_id=\"vu1u436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth_row_container tb_vu1u436 tb_first tf_w\">\n            <span  class=\"builder_row_cover tf_abs\" data-lazy=\"1\"><\/span>            <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_kpqs436 first\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_1gw2436 image-center   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-2-orange-square.jpg\" width=\"100\" height=\"1000\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image --><!-- module fancy heading -->\n<div  class=\"module module-fancy-heading tb_53uw436  tb_hide_divider\" data-lazy=\"1\">\n        <h1 class=\"fancy-heading tf_textc\">\n    <span class=\"main-head tf_block\">\n                    Tidal Zones            <\/span>\n\n    \n    <span class=\"sub-head tf_block tf_rel\">\n                    Surviving Extreme Conditions            <\/span>\n    <\/h1>\n<\/div>\n<!-- \/module fancy heading -->\n<!-- module image -->\n<div  class=\"module module-image tb_wiaf436 image-center   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/05\/gTe5G8KLc-1024x1024.png\" width=\"50\" height=\"1024\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"7qk2436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth_row_container tb_7qk2436 tf_w\">\n                        <div class=\"row_inner col_align_middle tb_col_count_2 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_hqen436 first\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_kms5436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img decoding=\"async\" src=\"http:\/\/biotas.org\/wp-content\/uploads\/2020\/10\/b2-1.jpg\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_3hm4436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_oqfi436    wow\" data-tf-animation=\"fadeInUp\" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h3><strong>Tidal Zone Objectives<\/strong><\/h3>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_53ty436    wow\" data-tf-animation=\"fadeInUp\" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <ul>\n<li><strong>Describe the risks to organisms in the tidal zone.<\/strong><\/li>\n<li><strong>Explain how (and why) life survives in tidal zones.<\/strong><\/li>\n<li><strong>Provide examples of keystone species in the tidal zone and near shore environments.<\/strong><\/li>\n<\/ul>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"x9fk436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_x9fk436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_ay5j436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_agr3436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-3 tb_yo3a436 first\">\n                    <!-- module video -->\n<div  class=\"module module-video tb_s4dk436 video-top  \" data-lazy=\"1\">\n                    <div class=\"video-wrap-outer\">\n            <div class=\"video-wrap tf_rel tf_overflow\">\n                                    <noscript><iframe data-no-script src=\"https:\/\/player.vimeo.com\/video\/311347289?h=&#038;pip=1&#038;playsinline=1&#038;portrait=0&#038;title=0&#038;byline=0\" allow=\"fullscreen\" class=\"tf_abs tf_w tf_h\"><\/iframe><\/noscript>\n                                <\/div>\n            <!-- \/video-wrap -->\n        <\/div>\n        <!-- \/video-wrap-outer -->\n            <\/div>\n        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_x8bf436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_tjol436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>We are at one of our favorite locations on the Oregon Coast: Cape Perpetua on highway 101, just north of Florence, Oregon.\u00a0 There is a visitor&#8217;s center, bathrooms (very important), a forest to explore, and famous tide pools (also called tidal pools).<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-parallax-bg=\"desktop\" data-anchor=\"reservation\" data-css_id=\"9mgi436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_has_section tb_section-reservation tb_9mgi436 tf_w\">\n            <span  class=\"builder_row_cover tf_abs\" data-lazy=\"1\"><\/span>            <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_ad1y436 first\">\n                            <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"xdcv436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_xdcv436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_kxff436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_1stq436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-3 tb_voj8436 first\">\n                    <!-- module video -->\n<div  class=\"module module-video tb_pjui436 video-top  \" data-lazy=\"1\">\n                    <div class=\"video-wrap-outer\">\n            <div class=\"video-wrap tf_rel tf_overflow\">\n                                    <noscript><iframe data-no-script src=\"https:\/\/player.vimeo.com\/video\/313016933?h=&#038;pip=1&#038;playsinline=1&#038;portrait=0&#038;title=0&#038;byline=0\" allow=\"fullscreen\" class=\"tf_abs tf_w tf_h\"><\/iframe><\/noscript>\n                                <\/div>\n            <!-- \/video-wrap -->\n        <\/div>\n        <!-- \/video-wrap-outer -->\n            <\/div>\n        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_p97e436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_lst3436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>Organisms along the rocky coast endure some of the most extreme conditions on Earth.<\/p>\n<p>This is Devil&#8217;s Churn on the north side of Cape Perpetua.\u00a0 The name gives it away.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"vka5436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_vka5436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_bae4436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_6mvp436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_h0bp436 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_cg87436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>There are safety and wildlife signs everywhere.\u00a0 Not only in this a protected marine reserve for organisms, the extreme conditions have been hazardous to visiting humans.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-3 tb_oido436 last\">\n                    <!-- module video -->\n<div  class=\"module module-video tb_pgx6436 video-top  \" data-lazy=\"1\">\n                    <div class=\"video-wrap-outer\">\n            <div class=\"video-wrap tf_rel tf_overflow\">\n                                    <noscript><iframe data-no-script src=\"https:\/\/player.vimeo.com\/video\/472071999?h=&#038;pip=1&#038;playsinline=1&#038;portrait=0&#038;title=0&#038;byline=0\" allow=\"fullscreen\" class=\"tf_abs tf_w tf_h\"><\/iframe><\/noscript>\n                                <\/div>\n            <!-- \/video-wrap -->\n        <\/div>\n        <!-- \/video-wrap-outer -->\n            <\/div>\n        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"3hui436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_3hui436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_y26j436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_nqnx436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-3 tb_ze95436 first\">\n                    <!-- module video -->\n<div  class=\"module module-video tb_3qq3436 video-top  \" data-lazy=\"1\">\n                    <div class=\"video-wrap-outer\">\n            <div class=\"video-wrap tf_rel tf_overflow\">\n                                    <noscript><iframe data-no-script src=\"https:\/\/player.vimeo.com\/video\/469938020?h=&#038;pip=1&#038;playsinline=1&#038;portrait=0&#038;title=0&#038;byline=0\" allow=\"fullscreen\" class=\"tf_abs tf_w tf_h\"><\/iframe><\/noscript>\n                                <\/div>\n            <!-- \/video-wrap -->\n        <\/div>\n        <!-- \/video-wrap-outer -->\n            <\/div>\n        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_rob8436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_w4cl436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>Even if you have years of experience on the coast, always pay attention to the water and designate one person in your party to watch for the safety of others.\u00a0 Even with our years of experience researching and teaching on the coast, Lesley has impressive scars on her right knee from a tidal pool incident.\u00a0 It could have been much worse.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-anchor=\"connect\" data-css_id=\"3u1x436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth_row_container tb_has_section tb_section-connect tb_3u1x436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_4gqx436 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_kt6r436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p style=\"text-align: center;\">Scoured out rocks can create pools of water when the tides recede.\u00a0 The tide pools (also called tidal pools) may provide wet conditions for organisms, but there are also risks associated with living in these pools.<\/p>\n<p style=\"text-align: center;\">From your experiences and\/or the videos, what risks can you think of?<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"0iic436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_0iic436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_2 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_2b19436 first\">\n                    <!-- module video -->\n<div  class=\"module module-video tb_1hcl436 video-top  \" data-lazy=\"1\">\n                    <div class=\"video-wrap-outer\">\n            <div class=\"video-wrap tf_rel tf_overflow\">\n                                    <noscript><iframe data-no-script src=\"https:\/\/player.vimeo.com\/video\/311594957?h=&#038;pip=1&#038;playsinline=1&#038;portrait=0&#038;title=0&#038;byline=0\" allow=\"fullscreen\" class=\"tf_abs tf_w tf_h\"><\/iframe><\/noscript>\n                                <\/div>\n            <!-- \/video-wrap -->\n        <\/div>\n        <!-- \/video-wrap-outer -->\n            <\/div>\n        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_f9a3436 last\">\n                    <!-- module video -->\n<div  class=\"module module-video tb_r8mo436 video-top  \" data-lazy=\"1\">\n                    <div class=\"video-wrap-outer\">\n            <div class=\"video-wrap tf_rel tf_overflow\">\n                                    <noscript><iframe data-no-script src=\"https:\/\/player.vimeo.com\/video\/311594740?h=&#038;pip=1&#038;playsinline=1&#038;portrait=0&#038;title=0&#038;byline=0\" allow=\"fullscreen\" class=\"tf_abs tf_w tf_h\"><\/iframe><\/noscript>\n                                <\/div>\n            <!-- \/video-wrap -->\n        <\/div>\n        <!-- \/video-wrap-outer -->\n            <\/div>\n        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-anchor=\"connect\" data-css_id=\"w60a436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth_row_container tb_has_section tb_section-connect tb_w60a436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_fode436 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_uxl1436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p style=\"text-align: center;\">Possible threats include: warming temperatures, changing pH, limited food, exposure to predators, competition for space, incoming waves, etc.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-lazy=\"1\" class=\"module_row themify_builder_row tb_at0k436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_1epd436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_2uve436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-3 tb_k26v436 first\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_l666436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/tidal-pool-prod-1024x315.jpg\" width=\"1024\" height=\"315\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_ti3f436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_77d1436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>Despite harsh conditions, tidal pools have the ingredients for life: water, sunlight, and nutrients.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-lazy=\"1\" class=\"module_row themify_builder_row tb_rlt4436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_thkb436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_3jic436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_b6vl436 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_sizw436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>Organisms in tidal pools face significant threats.\u00a0 Along sandy shores, organisms can dig into moist sand.\u00a0 In rocky tidal pools, animals have ways of retaining moisture at low tide.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-3 tb_n60j436 last\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_a5cv436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/tid-pool-1024x318.jpg\" width=\"1024\" height=\"318\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-lazy=\"1\" class=\"module_row themify_builder_row tb_m6hy436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_o8e4436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_gnzc436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-3 tb_3gad436 first\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_zyjv436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/tid-pool-protect-1024x317.jpg\" width=\"1024\" height=\"317\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_6u0v436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_o5xa436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>Hermit crabs have protective shells, barnacles have mineral structures that retain moisture.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-anchor=\"reservation\" data-css_id=\"m7gn436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_has_section tb_section-reservation tb_m7gn436 tf_w\">\n            <span  class=\"builder_row_cover tf_abs\" data-lazy=\"1\"><\/span>            <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_618s436 first\">\n                            <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"kgk5436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_kgk5436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_mv2i436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_42s8436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-2 tb_0uwv436 first\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_69g1436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/11\/sea-star-near-shore-1024x684.jpg\" width=\"1024\" height=\"684\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-2 tb_wms1436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_uc9f436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>Some of the best known organisms of near shore and tide pool habitats are the sea stars.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"ij4f436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_ij4f436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_rcck436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_2sq4436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_sz07436 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_dc2e436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>Along the Oregon coast <em>Pisaster ocheaceus<\/em> is shades of purple, brown, and orange are found in many tide pools at low tide.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-3 tb_yjbx436 last\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_gcrz436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/key-ss-a-1024x316.jpg\" width=\"1024\" height=\"316\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"j1fs436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_j1fs436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_pd80436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_6gos436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-3 tb_cx6t436 first\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_tenc436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/key-sea-b-1024x317.jpg\" width=\"1024\" height=\"317\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_so99436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_j6gt436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>A disease killed massive numbers of pacific coast sea stars in this decade, and this had an unexpectedly significant impact on other tidal pool species.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"37f9436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_37f9436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_ufww436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_icjw436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-3 tb_y3ls436 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_szou436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>A <strong>keystone species<\/strong> has a disproportionately large impact on its community, even if it does not have a high biomass.<\/p>\n<p>Loss of sea stars caused the animals they ate to increase dramatically in number, and this effect cascaded through the food web, changing the community significantly.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_6vdm436 last\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_iqbf436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/key-def-999x1024.jpg\" width=\"999\" height=\"1024\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-parallax-bg=\"desktop\" data-anchor=\"reservation\" data-css_id=\"r8d6436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_has_section tb_section-reservation tb_r8d6436 tf_w\">\n            <span  class=\"builder_row_cover tf_abs\" data-lazy=\"1\"><\/span>            <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_8qk4436 first\">\n                            <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"5u80436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_5u80436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_6hb2436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_ygqi436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-3 tb_2od7436 first\">\n                    <!-- module video -->\n<div  class=\"module module-video tb_mml8436 video-top  \" data-lazy=\"1\">\n                    <div class=\"video-wrap-outer\">\n            <div class=\"video-wrap tf_rel tf_overflow\">\n                                    <noscript><iframe data-no-script src=\"https:\/\/player.vimeo.com\/video\/469593671?h=&#038;pip=1&#038;playsinline=1&#038;portrait=0&#038;title=0&#038;byline=0\" allow=\"fullscreen\" class=\"tf_abs tf_w tf_h\"><\/iframe><\/noscript>\n                                <\/div>\n            <!-- \/video-wrap -->\n        <\/div>\n        <!-- \/video-wrap-outer -->\n            <\/div>\n        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_lde8436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_gdhr436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>This is a scan of a tidal pool at low tide.\u00a0 Note how dramatically different the organisms are lower on the rock where they are cooler and wetter.\u00a0 This is why it is worthwhile to plan a coastal trip using tide tables.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"ro5h436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_ro5h436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_pjde436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_mx5k436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col3-1 tb_hln6436 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_jz2a436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>You may have experienced reaching the tidal pools at high tide, when most of the rocky pools you want to explore are under water.\u00a0 Keeping an eye out for any possible sneaker waves, there can still be a lot to see in the higher pools.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col3-2 tb_n41w436 last\">\n                    <!-- module video -->\n<div  class=\"module module-video tb_mae8436 video-top  \" data-lazy=\"1\">\n                    <div class=\"video-wrap-outer\">\n            <div class=\"video-wrap tf_rel tf_overflow\">\n                                    <noscript><iframe data-no-script src=\"https:\/\/player.vimeo.com\/video\/311594957?h=&#038;pip=1&#038;playsinline=1&#038;portrait=0&#038;title=0&#038;byline=0\" allow=\"fullscreen\" class=\"tf_abs tf_w tf_h\"><\/iframe><\/noscript>\n                                <\/div>\n            <!-- \/video-wrap -->\n        <\/div>\n        <!-- \/video-wrap-outer -->\n            <\/div>\n        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"6wyf436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_6wyf436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_rkpz436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_n4tm436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-2 tb_87l6436 first\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_csb7436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img decoding=\"async\" src=\"http:\/\/biotas.org\/wp-content\/uploads\/2020\/10\/b2-less-photo.jpg\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-2 tb_8wln436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_9o1c436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>These high pools are warmer and often have freshwater mixed in with the saltwater.\u00a0<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"5wtw436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_5wtw436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_ml03436 first\">\n                            <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_middle tb_col_count_2 tb_xwta436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col3-2 tb_ds0q436 first\">\n                    <!-- module video -->\n<div  class=\"module module-video tb_svil436 video-top  \" data-lazy=\"1\">\n                    <div class=\"video-wrap-outer\">\n            <div class=\"video-wrap tf_rel tf_overflow\">\n                                    <noscript><iframe data-no-script src=\"https:\/\/player.vimeo.com\/video\/469380192?h=&#038;pip=1&#038;playsinline=1&#038;portrait=0&#038;title=0&#038;byline=0\" allow=\"fullscreen\" class=\"tf_abs tf_w tf_h\"><\/iframe><\/noscript>\n                                <\/div>\n            <!-- \/video-wrap -->\n        <\/div>\n        <!-- \/video-wrap-outer -->\n            <\/div>\n        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col3-1 tb_89vg436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_ti8i436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>This is not the place for sea stars and anemone, but the brownish-green algae flourishes, supporting a unique food web.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-anchor=\"connect\" data-css_id=\"r03j436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth_row_container tb_has_section tb_section-connect tb_r03j436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_fdpi436 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_097v436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p style=\"text-align: center;\">It may take a moment to adjust your eyes to the smaller scale, but then you can see that life is everywhere in these small pools that most people walk right past.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"iifg436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_iifg436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_2 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_c3gb436 first\">\n                    <!-- module video -->\n<div  class=\"module module-video tb_v263436 video-top  \" data-lazy=\"1\">\n                    <div class=\"video-wrap-outer\">\n            <div class=\"video-wrap tf_rel tf_overflow\">\n                                    <noscript><iframe data-no-script src=\"https:\/\/player.vimeo.com\/video\/469933890?h=&#038;pip=1&#038;playsinline=1&#038;portrait=0&#038;title=0&#038;byline=0\" allow=\"fullscreen\" class=\"tf_abs tf_w tf_h\"><\/iframe><\/noscript>\n                                <\/div>\n            <!-- \/video-wrap -->\n        <\/div>\n        <!-- \/video-wrap-outer -->\n            <\/div>\n        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_sdzs436 last\">\n                    <!-- module video -->\n<div  class=\"module module-video tb_7epc436 video-top  \" data-lazy=\"1\">\n                    <div class=\"video-wrap-outer\">\n            <div class=\"video-wrap tf_rel tf_overflow\">\n                                    <noscript><iframe data-no-script src=\"https:\/\/player.vimeo.com\/video\/469934294?h=&#038;pip=1&#038;playsinline=1&#038;portrait=0&#038;title=0&#038;byline=0\" allow=\"fullscreen\" class=\"tf_abs tf_w tf_h\"><\/iframe><\/noscript>\n                                <\/div>\n            <!-- \/video-wrap -->\n        <\/div>\n        <!-- \/video-wrap-outer -->\n            <\/div>\n        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-desktop-padding=\"3px,3px\" data-css_id=\"18cz436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth_row_container tb_18cz436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_3s3n436 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_chfl436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h5>The next section explores coral reefs, including the amazing endosymbiotic relationship that makes these reefs possible.<\/h5>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"9jyy436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth_row_container tb_9jyy436 tf_w\">\n                        <div class=\"row_inner col_align_middle tb_col_count_2 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_o0nk436 first\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_nxb3436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img decoding=\"async\" src=\"http:\/\/biotas.org\/wp-content\/uploads\/2020\/10\/b2-1.jpg\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_u59y436 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_5jq3436    wow\" data-tf-animation=\"fadeInUp\" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h5>Check your knowledge.\u00a0 Can you:<\/h5>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_5ypa436    wow\" data-tf-animation=\"fadeInUp\" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <ul>\n<li><strong>describe the risks to organisms in the tidal zone?<\/strong><\/li>\n<li><strong>explain how (and why) life survives in tidal zones?<\/strong><\/li>\n<li><strong>provide examples of keystone species in the tidal zone and near shore environments?<\/strong><\/li>\n<\/ul>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"13rm436\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_13rm436 tf_w\">\n            <span  class=\"builder_row_cover tf_abs\" data-lazy=\"1\"><\/span>            <div class=\"row_inner col_align_middle gutter-none tb_col_count_2 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_ny0q436 first\">\n        <span  class=\"builder_row_cover tf_abs\" data-lazy=\"1\"><\/span>            <!-- module image -->\n<div  class=\"module module-image tb_2dfa436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/basic-needs\/#\">\n                   <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-1-orange-square.jpg\" width=\"100\" height=\"1000\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">        <\/a>\n    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image --><!-- module text -->\n<div  class=\"module module-text tb_nvcd436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h5>Go back to the Basic Needs Page<\/h5>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_kw3x436 last\">\n        <span  class=\"builder_row_cover tf_abs\" data-lazy=\"1\"><\/span>            <!-- module image -->\n<div  class=\"module module-image tb_nbq6436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/coral-reefs\/#\">\n                   <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-3-orange-square.jpg\" width=\"100\" height=\"1000\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">        <\/a>\n    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image --><!-- module text -->\n<div  class=\"module module-text tb_8r84436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h5>Go forward to the Coral Reefs Page<\/h5>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-lazy=\"1\" class=\"module_row themify_builder_row tb_8ptl436 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_abce436 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_u9en436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h3>Organism Care Lecture Guide Contents<\/h3>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module divider -->\n<div  class=\"module tf_mw module-divider tb_c30n436 solid  divider-custom divider-center\" style=\"border-width: 3px;border-color: #029e9e;margin-top: 10px;margin-bottom: 20px;max-width: 120px;\" data-lazy=\"1\">\n    <\/div>\n<!-- \/module divider -->\n<!-- module text -->\n<div  class=\"module module-text tb_aq1j436   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h6>This guide and lecture material are assessed on the weekly quiz.<\/h6>    <\/div>\n<\/div>\n<!-- \/module text -->        <div  data-lazy=\"1\" class=\"module_subrow themify_builder_sub_row tf_w col_align_top tb_col_count_4 tb_bvjy436\">\n                <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_fc5q436 first\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_ix44436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/basic-needs\/#\">\n                   <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-1-orange-square.jpg\" width=\"200\" height=\"200\" title=\"Basic Needs\" alt=\"Basic Needs\">        <\/a>\n    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <div class=\"image-content\">\n                    <h3 class=\"image-title\">\n                                    <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/basic-needs\/#\">\n                        Basic Needs                    <\/a>\n                            <\/h3>\n                    <\/div>\n    <!-- \/image-content -->\n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_5w6x436\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_ph15436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-2-orange-square.jpg\" width=\"200\" height=\"200\" title=\"Tidal Zones - YOU ARE HERE\" alt=\"Tidal Zones - YOU ARE HERE\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <div class=\"image-content\">\n                    <h3 class=\"image-title\">\n                                    Tidal Zones - YOU ARE HERE                            <\/h3>\n                    <\/div>\n    <!-- \/image-content -->\n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_lht5436\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_a9fr436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/coral-reefs\/#\">\n                   <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-3-orange-square.jpg\" width=\"200\" height=\"200\" title=\"Coral Reefs\" alt=\"Coral Reefs\">        <\/a>\n    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <div class=\"image-content\">\n                    <h3 class=\"image-title\">\n                                    <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/coral-reefs\/#\">\n                        Coral Reefs                    <\/a>\n                            <\/h3>\n                    <\/div>\n    <!-- \/image-content -->\n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column sub_column col4-1 tb_umeu436 last\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_2p42436 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/marine-invertebrates\/#\">\n                   <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-4-orange-square.jpg\" width=\"200\" height=\"200\" title=\"Marine Invertebrates\" alt=\"Marine Invertebrates\">        <\/a>\n    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <div class=\"image-content\">\n                    <h3 class=\"image-title\">\n                                    <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/marine-invertebrates\/#\">\n                        Marine Invertebrates                    <\/a>\n                            <\/h3>\n                    <\/div>\n    <!-- \/image-content -->\n        <\/div>\n<!-- \/module image -->        <\/div>\n                    <\/div>\n                <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-css_id=\"01v7729\" data-lazy=\"1\" class=\"module_row themify_builder_row fullwidth tb_01v7729 tf_w\">\n            <span  class=\"builder_row_cover tf_abs\" data-lazy=\"1\"><\/span>            <div class=\"row_inner col_align_top gutter-none tb_col_count_3 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col3-1 tb_9zag729 first\">\n        <span  class=\"builder_row_cover tf_abs\" data-lazy=\"1\"><\/span>            <!-- module image -->\n<div  class=\"module module-image tb_oqyt729 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/#\">\n                   <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Module-Icon.jpg\" width=\"100\" height=\"1000\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">        <\/a>\n    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image --><!-- module text -->\n<div  class=\"module module-text tb_s24g729   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h3>Back to Module 6<\/h3>\n<h5>This week&#8217;s overview<\/h5>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column tb-column col3-1 tb_o86f729\">\n        <span  class=\"builder_row_cover tf_abs\" data-lazy=\"1\"><\/span>            <!-- module image -->\n<div  class=\"module module-image tb_f4r0729 image-top   tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/#\">\n                   <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Guide-Icon.jpg\" width=\"100\" height=\"1000\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">        <\/a>\n    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image --><!-- module text -->\n<div  class=\"module module-text tb_308a729   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h3>This Guide<\/h3>\n<h5>Organism Care<\/h5>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column tb-column col3-1 tb_1sps729 last\">\n        <span  class=\"builder_row_cover tf_abs\" data-lazy=\"1\"><\/span>            <!-- module image -->\n<div  class=\"module module-image tb_8857729 image-top circle  tf_mw\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <a href=\"https:\/\/oregonstate.instructure.com\">\n                   <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/vividscience.org\/wp-content\/uploads\/2018\/10\/Screen-Shot-2018-10-14-at-10.32.37-PM-3.png\" width=\"100\" height=\"368\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">        <\/a>\n    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image --><!-- module text -->\n<div  class=\"module module-text tb_urv1729   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h3>Direct Link to Canvas<\/h3>\n<h5>Submit Products<\/h5>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                        <\/div>\n        <\/div>\n        <\/div>\n<!--\/themify_builder_content-->","protected":false},"excerpt":{"rendered":"<p>Tidal Zone Objectives<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":28703,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-28732","page","type-page","status-publish","hentry","has-post-title","has-post-date","has-post-category","has-post-tag","has-post-comment","has-post-author",""],"builder_content":"<img src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-2-orange-square.jpg\" width=\"100\" height=\"1000\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n<h1>Tidal Zones<br\/>Surviving Extreme Conditions<\/h1>\n<img src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/05\/gTe5G8KLc-1024x1024.png\" width=\"50\" height=\"1024\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n<img src=\"http:\/\/biotas.org\/wp-content\/uploads\/2020\/10\/b2-1.jpg\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n<h3><strong>Tidal Zone Objectives<\/strong><\/h3>\n<ul> <li><strong>Describe the risks to organisms in the tidal zone.<\/strong><\/li> <li><strong>Explain how (and why) life survives in tidal zones.<\/strong><\/li> <li><strong>Provide examples of keystone species in the tidal zone and near shore environments.<\/strong><\/li> <\/ul>\n[embed]https:\/\/vimeo.com\/311347289[\/embed]\n<p>We are at one of our favorite locations on the Oregon Coast: Cape Perpetua on highway 101, just north of Florence, Oregon.\u00a0 There is a visitor's center, bathrooms (very important), a forest to explore, and famous tide pools (also called tidal pools).<\/p>\n[embed]https:\/\/vimeo.com\/313016933[\/embed]\n<p>Organisms along the rocky coast endure some of the most extreme conditions on Earth.<\/p> <p>This is Devil's Churn on the north side of Cape Perpetua.\u00a0 The name gives it away.<\/p>\n<p>There are safety and wildlife signs everywhere.\u00a0 Not only in this a protected marine reserve for organisms, the extreme conditions have been hazardous to visiting humans.<\/p>\n[embed]https:\/\/vimeo.com\/472071999[\/embed]\n[embed]https:\/\/vimeo.com\/469938020[\/embed]\n<p>Even if you have years of experience on the coast, always pay attention to the water and designate one person in your party to watch for the safety of others.\u00a0 Even with our years of experience researching and teaching on the coast, Lesley has impressive scars on her right knee from a tidal pool incident.\u00a0 It could have been much worse.<\/p>\n<p style=\"text-align: center;\">Scoured out rocks can create pools of water when the tides recede.\u00a0 The tide pools (also called tidal pools) may provide wet conditions for organisms, but there are also risks associated with living in these pools.<\/p> <p style=\"text-align: center;\">From your experiences and\/or the videos, what risks can you think of?<\/p>\n[embed]https:\/\/vimeo.com\/311594957[\/embed]\n[embed]https:\/\/vimeo.com\/311594740[\/embed]\n<p style=\"text-align: center;\">Possible threats include: warming temperatures, changing pH, limited food, exposure to predators, competition for space, incoming waves, etc.<\/p>\n<img src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/tidal-pool-prod-1024x315.jpg\" width=\"1024\" height=\"315\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n<p>Despite harsh conditions, tidal pools have the ingredients for life: water, sunlight, and nutrients.<\/p>\n<p>Organisms in tidal pools face significant threats.\u00a0 Along sandy shores, organisms can dig into moist sand.\u00a0 In rocky tidal pools, animals have ways of retaining moisture at low tide.<\/p>\n<img src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/tid-pool-1024x318.jpg\" width=\"1024\" height=\"318\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n<img src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/tid-pool-protect-1024x317.jpg\" width=\"1024\" height=\"317\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n<p>Hermit crabs have protective shells, barnacles have mineral structures that retain moisture.<\/p>\n<img src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/11\/sea-star-near-shore-1024x684.jpg\" width=\"1024\" height=\"684\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n<p>Some of the best known organisms of near shore and tide pool habitats are the sea stars.<\/p>\n<p>Along the Oregon coast <em>Pisaster ocheaceus<\/em> is shades of purple, brown, and orange are found in many tide pools at low tide.<\/p>\n<img src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/key-ss-a-1024x316.jpg\" width=\"1024\" height=\"316\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n<img src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/key-sea-b-1024x317.jpg\" width=\"1024\" height=\"317\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n<p>A disease killed massive numbers of pacific coast sea stars in this decade, and this had an unexpectedly significant impact on other tidal pool species.<\/p>\n<p>A <strong>keystone species<\/strong> has a disproportionately large impact on its community, even if it does not have a high biomass.<\/p> <p>Loss of sea stars caused the animals they ate to increase dramatically in number, and this effect cascaded through the food web, changing the community significantly.<\/p>\n<img src=\"http:\/\/naturejournals.org\/wp-content\/uploads\/2019\/07\/key-def-999x1024.jpg\" width=\"999\" height=\"1024\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n[embed]https:\/\/vimeo.com\/469593671[\/embed]\n<p>This is a scan of a tidal pool at low tide.\u00a0 Note how dramatically different the organisms are lower on the rock where they are cooler and wetter.\u00a0 This is why it is worthwhile to plan a coastal trip using tide tables.<\/p>\n<p>You may have experienced reaching the tidal pools at high tide, when most of the rocky pools you want to explore are under water.\u00a0 Keeping an eye out for any possible sneaker waves, there can still be a lot to see in the higher pools.<\/p>\n[embed]https:\/\/vimeo.com\/311594957[\/embed]\n<img src=\"http:\/\/biotas.org\/wp-content\/uploads\/2020\/10\/b2-less-photo.jpg\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n<p>These high pools are warmer and often have freshwater mixed in with the saltwater.\u00a0<\/p>\n[embed]https:\/\/vimeo.com\/469380192[\/embed]\n<p>This is not the place for sea stars and anemone, but the brownish-green algae flourishes, supporting a unique food web.<\/p>\n<p style=\"text-align: center;\">It may take a moment to adjust your eyes to the smaller scale, but then you can see that life is everywhere in these small pools that most people walk right past.<\/p>\n[embed]https:\/\/vimeo.com\/469933890[\/embed]\n[embed]https:\/\/vimeo.com\/469934294[\/embed]\n<h5>The next section explores coral reefs, including the amazing endosymbiotic relationship that makes these reefs possible.<\/h5>\n<img src=\"http:\/\/biotas.org\/wp-content\/uploads\/2020\/10\/b2-1.jpg\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\">\n<h5>Check your knowledge.\u00a0 Can you:<\/h5>\n<ul> <li><strong>describe the risks to organisms in the tidal zone?<\/strong><\/li> <li><strong>explain how (and why) life survives in tidal zones?<\/strong><\/li> <li><strong>provide examples of keystone species in the tidal zone and near shore environments?<\/strong><\/li> <\/ul>\n<a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/basic-needs\/#\"> <img src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-1-orange-square.jpg\" width=\"100\" height=\"1000\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\"> <\/a>\n<h5>Go back to the Basic Needs Page<\/h5>\n<a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/coral-reefs\/#\"> <img src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-3-orange-square.jpg\" width=\"100\" height=\"1000\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\"> <\/a>\n<h5>Go forward to the Coral Reefs Page<\/h5>\n<h3>Organism Care Lecture Guide Contents<\/h3>\n\n<h6>This guide and lecture material are assessed on the weekly quiz.<\/h6>\n<a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/basic-needs\/#\"> <img src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-1-orange-square.jpg\" width=\"200\" height=\"200\" title=\"Basic Needs\" alt=\"Basic Needs\"> <\/a> <h3> <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/basic-needs\/#\"> Basic Needs <\/a> <\/h3>\n<img src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-2-orange-square.jpg\" width=\"200\" height=\"200\" title=\"Tidal Zones - YOU ARE HERE\" alt=\"Tidal Zones - YOU ARE HERE\"> <h3> Tidal Zones - YOU ARE HERE <\/h3>\n<a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/coral-reefs\/#\"> <img src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-3-orange-square.jpg\" width=\"200\" height=\"200\" title=\"Coral Reefs\" alt=\"Coral Reefs\"> <\/a> <h3> <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/coral-reefs\/#\"> Coral Reefs <\/a> <\/h3>\n<a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/marine-invertebrates\/#\"> <img src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Number-4-orange-square.jpg\" width=\"200\" height=\"200\" title=\"Marine Invertebrates\" alt=\"Marine Invertebrates\"> <\/a> <h3> <a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/marine-invertebrates\/#\"> Marine Invertebrates <\/a> <\/h3>\n<a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/#\"> <img src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Module-Icon.jpg\" width=\"100\" height=\"1000\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\"> <\/a>\n<h3>Back to Module 6<\/h3> <h5>This week's overview<\/h5>\n<a href=\"https:\/\/vividscience.org\/index.php\/campus-envirobio\/conditions\/organism-care\/#\"> <img src=\"http:\/\/humanbio.org\/wp-content\/uploads\/2020\/03\/Guide-Icon.jpg\" width=\"100\" height=\"1000\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\"> <\/a>\n<h3>This Guide<\/h3> <h5>Organism Care<\/h5>\n<a href=\"https:\/\/oregonstate.instructure.com\"> <img src=\"http:\/\/vividscience.org\/wp-content\/uploads\/2018\/10\/Screen-Shot-2018-10-14-at-10.32.37-PM-3.png\" width=\"100\" height=\"368\" title=\"6a2 Tidal Zones\" alt=\"6a2 Tidal Zones\"> <\/a>\n<h3>Direct Link to Canvas<\/h3> <h5>Submit Products<\/h5>","_links":{"self":[{"href":"https:\/\/vividscience.org\/index.php\/wp-json\/wp\/v2\/pages\/28732","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vividscience.org\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/vividscience.org\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/vividscience.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vividscience.org\/index.php\/wp-json\/wp\/v2\/comments?post=28732"}],"version-history":[{"count":9,"href":"https:\/\/vividscience.org\/index.php\/wp-json\/wp\/v2\/pages\/28732\/revisions"}],"predecessor-version":[{"id":29164,"href":"https:\/\/vividscience.org\/index.php\/wp-json\/wp\/v2\/pages\/28732\/revisions\/29164"}],"up":[{"embeddable":true,"href":"https:\/\/vividscience.org\/index.php\/wp-json\/wp\/v2\/pages\/28703"}],"wp:attachment":[{"href":"https:\/\/vividscience.org\/index.php\/wp-json\/wp\/v2\/media?parent=28732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}