{"id":1960,"date":"2023-11-01T20:47:38","date_gmt":"2023-11-01T20:47:38","guid":{"rendered":"https:\/\/live-usc-dornsife.pantheonsite.io\/uscseagrant\/?page_id=1960"},"modified":"2024-06-27T17:32:16","modified_gmt":"2024-06-27T17:32:16","slug":"struggling-sea-urchins","status":"publish","type":"page","link":"https:\/\/dornsife.usc.edu\/uscseagrant\/struggling-sea-urchins\/","title":{"rendered":"Struggling Sea Urchins"},"content":{"rendered":"\n\n\n\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--accordions \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--accordions\"\n    \n      >\n\n    \n      <div class=\"header-container\">\n\n                  \n<div class=\"f--field f--section-title\">\n\n    \n  <h2>\n          Red sea urchins suffer harmful growth effects under common California water conditions \n      <\/h2>\n\n\n<\/div>\n      \n                  \n<div class=\"f--field f--description\">\n\n    \n  <p><span style=\"font-weight: 400;\">Conditions along the California coast are changing quickly, with ocean acidification (OA) and hypoxia of increasing concern, particularly for ecologically and commercially important calcifying species such as red sea urchins and Dungeness crabs. It is critical to understand species-specific tolerance thresholds and the interactions of co-occurring stressors to predict climate change impacts on fisheries and ecosystems and inform management. University of Southern California (USC) Sea Grant funded a study to examine the responses of larval Dungeness crabs and larval red sea urchins under interactive OA and hypoxia stressor effects to determine the overall sensitivity of these species. The study will determine those areas along the California coast that are most sensitive to the combined effects for both species.<\/span><\/p>\n\n\n\n<\/div>\n      \n      \n    <\/div>\n  \n  \n  \n\n  <\/div><\/div>\n\n\n\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <h3><b>Key Results<\/b><span style=\"font-weight: 400;\">:<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Red sea urchin larvae suffer harmful developmental effects under even relatively mild laboratory conditions of changing OAH\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In addition to this gradient, breakpoints have been detected (DO of 2.64-3.67 mg\/L and pH 7.6-7.85), representing drastic shifts in response curves and a potential environmental threshold that acutely impacts gene expression and development.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Simulated OA and hypoxia conditions that are documented to exist in CA coastal waters have shown that even mild conditions of combined OA and hypoxia have a measurable detrimental effect on the performance of red urchin larvae.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u00a0By assessing the physiological response and gene expression of these species, the study hopes to inform future management actions to mitigate OAH-related impacts and maintain fishery populations.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3><b>Project Impacts &amp; Application:<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Results were presented to National Oceanic and Atmospheric Administration (NOAA) leadership in two invitation-only talks as well as to the state water quality managers<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3><b>Principal Investigators:<\/b><\/h3>\n<ul>\n<li><span style=\"font-weight: 400;\">Nina Bednarsek, Ph.D., Southern California Coastal Water Research Project\u00a0<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Andrew Gracey, Ph.D., University of Southern California<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3><b>Funding: <\/b><\/h3>\n<p><span style=\"font-weight: 400;\">NOAA, 2020-2022<\/span><\/p>\n<h3><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>Additional Info and Publications<\/b><span style=\"font-weight: 400;\">:<\/span><b>\u00a0<\/b><\/h3>\n<ul>\n<li><a href=\"https:\/\/dornsife.usc.edu\/labs\/gracey\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">https:\/\/dornsife.usc.edu\/labs\/gracey\/<\/span><\/a><\/li>\n<li><span style=\"font-weight: 400;\"><strong>Bednar\u0161ek Nina<\/strong><span style=\"font-weight: 400;\">, Ambrose Richard, Calosi Piero, Childers Richard K., Feely Richard A., Litvin Steven Y., Long W. Christopher, Spicer John I., \u0160trus Jasna, Taylor Jennifer, Kessouri Faycal, Roethler Miranda, Sutula Martha, Weisberg Stephen B. Synthesis of Thresholds of Ocean Acidification Impacts on Decapods. Front. Mar. Sci., 26 October <\/span><b style=\"color: #333333;\">2021<\/b><\/span><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\"> Sec. Coastal Ocean Processes Volume 8 &#8211; 2021 | <\/span><\/span><a href=\"https:\/\/doi.org\/10.3389\/fmars.2021.651102\" target=\"_blank\" rel=\"noopener\">https:\/\/doi.org\/10.3389\/fmars.2021.651102<\/a><\/li>\n<li><span style=\"font-weight: 400;\"><strong>Nina Bednar\u0161ek<\/strong><span style=\"font-weight: 400;\">, Richard A. Feely, Marcus W. Beck, Simone R. Alin, Samantha A. Siedlecki, Piero Calosi, Emily L. Norton, Casey Saenger, Jasna \u0160trus, Dana Greeley, Nikolay P. Nezlin, Miranda Roethler, John I. Spicer. Exoskeleton dissolution with mechanoreceptor damage in larval Dungeness crab related to severity of present-day ocean acidification vertical gradients, <\/span><i style=\"color: #333333;\">Science of The Total Environment,<\/i><span style=\"font-weight: 400;\"> Volume 716, <\/span><b style=\"color: #333333;\">2020<\/b><\/span><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">, 136610, ISSN 0048-9697,<\/span><\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/31982187\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\"> https:\/\/doi.org\/10.1016\/j.scitotenv.2020.136610.<\/span><\/a><\/li>\n<li><span style=\"font-weight: 400;\">Norton Emily L., Siedlecki Samantha, Kaplan Isaac C., Hermann Albert J., Fisher Jennifer L., Morgan Cheryl A., Officer Suzanna, Saenger Casey, Alin Simone R., Newton Jan, <\/span><strong>Bednar\u0161ek Nina<\/strong><span style=\"font-weight: 400;\">, Feely Richard A. The Importance of Environmental Exposure History in Forecasting Dungeness Crab Megalopae Occurrence Using J-SCOPE, a High-Resolution Model for the US Pacific Northwest. <\/span><i><span style=\"font-weight: 400;\">Frontiers in Marine Science<\/span><\/i><span style=\"font-weight: 400;\">. VOLUME 7. <\/span><b>2020<\/b><span style=\"font-weight: 400;\">. <\/span><a href=\"https:\/\/www.frontiersin.org\/articles\/10.3389\/fmars.2020.00102\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">DOI=10.3389\/fmars.2020.00102<\/span><\/a><\/li>\n<\/ul>\n<p><a class=\"cta-link\" href=\"\/uscseagrant\/publications-database\/\">Access our Publications Database to view publications from this project or other related topics<\/a><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n\n\n\n\n                        \n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--photo-wall \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--photo-wall\"\n    \n      >\n\n    \n      <div class=\"heading-container\">\n      \n                  \n<div class=\"f--field f--description\">\n\n    \n  <p><br data-mce-bogus=\"1\"><\/p>\n\n\n\n<\/div>\n          <\/div>\n  \n  <div class=\"photos-container\">\n\n    \n    <div class=\"grid-sizer\"><\/div>\n    <div class=\"gutter-sizer\"><\/div>\n\n      \n                                                \n                <div class=\"photo\">\n\n            \n                \n<div class=\"f--field f--image\">\n\n    \n    \n    \n    \n    \n    \n              \n      <img decoding=\"async\"\n                            src=\"https:\/\/dornsife.usc.edu\/uscseagrant\/wp-content\/uploads\/sites\/52\/2023\/11\/Screen-Shot-2023-11-16-at-4.32.41-PM-540x0-c-default.png\"\n                    \n        \n                  alt=\"Dungeness crab juveniles in a cage\"\n        \n        \n                                      \/>\n\n    \n    \n  \n  \n\n<\/div>\n\n                          <a href=\"#photo-622729252\" class=\"photo-trigger\" aria-label=\"Expand to view image and text\">\n                <svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" x=\"0px\" y=\"0px\" viewBox=\"0 0 35 35\" enable-background=\"new 0 0 35 35\" xml:space=\"preserve\"><path fill-rule=\"evenodd\" clip-rule=\"evenodd\" fill=\"#000000\" d=\"M28,7v7.9h-2.6l0-3.4l-4.3,4.3c-0.3,0.3-0.6,0.4-0.9,0.4s-0.7-0.1-0.9-0.4c-0.5-0.5-0.5-1.3,0-1.9l4.3-4.3h-3.4V7H28z M7,28v-7.9h2.6v3.4l4.3-4.3c0.5-0.5,1.3-0.5,1.9,0c0.5,0.5,0.5,1.3,0,1.9l-4.3,4.3h3.4V28H7z\"\/><\/svg>\n              <\/a>\n                      <\/div>\n                <div class=\"photo\">\n\n            \n                \n<div class=\"f--field f--image\">\n\n    \n    \n    \n    \n    \n    \n              \n      <img decoding=\"async\"\n                            src=\"https:\/\/dornsife.usc.edu\/uscseagrant\/wp-content\/uploads\/sites\/52\/2023\/11\/Biological_effects_in_Dungeness_crabs-1-540x0-c-default.jpg\"\n                    \n        \n                  alt=\"The impact of ocean acidification (low pH) and hypoxia (low DO) on the exoskeleton dissolution of juvenile Dungeness crabs. While low pH increases dissolution, the negative effect is exacerbated under interaction of both stressors (low pH\/low DO).\"\n        \n        \n                                      \/>\n\n    \n    \n  \n  \n\n<\/div>\n\n                          <a href=\"#photo-2132038137\" class=\"photo-trigger\" aria-label=\"Expand to view image and text\">\n                <svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" x=\"0px\" y=\"0px\" viewBox=\"0 0 35 35\" enable-background=\"new 0 0 35 35\" xml:space=\"preserve\"><path fill-rule=\"evenodd\" clip-rule=\"evenodd\" fill=\"#000000\" d=\"M28,7v7.9h-2.6l0-3.4l-4.3,4.3c-0.3,0.3-0.6,0.4-0.9,0.4s-0.7-0.1-0.9-0.4c-0.5-0.5-0.5-1.3,0-1.9l4.3-4.3h-3.4V7H28z M7,28v-7.9h2.6v3.4l4.3-4.3c0.5-0.5,1.3-0.5,1.9,0c0.5,0.5,0.5,1.3,0,1.9l-4.3,4.3h3.4V28H7z\"\/><\/svg>\n              <\/a>\n                      <\/div>\n                <div class=\"photo\">\n\n            \n                \n<div class=\"f--field f--image\">\n\n    \n    \n    \n    \n    \n    \n              \n      <img decoding=\"async\"\n                            src=\"https:\/\/dornsife.usc.edu\/uscseagrant\/wp-content\/uploads\/sites\/52\/2023\/11\/Screen-Shot-2023-11-16-at-4.31.56-PM-540x0-c-default.png\"\n                    \n        \n                  alt=\"Microscopic image of larval sea urchins under pH 7.85 show more fragile skeleton with the absence of spikes on the skeleton and increased porosity.\"\n        \n        \n                                      \/>\n\n    \n    \n  \n  \n\n<\/div>\n\n                      <\/div>\n      \n      <\/div>\n\n            <div id=\"photo-622729252\" class=\"photo-lightbox lity-hide\">\n        <div class=\"text-container\">\n          \n                          \n<div class=\"f--field f--description\">\n\n    \n  <p><br data-mce-bogus=\"1\"><\/p>\n\n\n\n<\/div>\n          \n                  <\/div>\n\n        \n            \n<div class=\"f--field f--image\">\n\n    \n    \n    \n    \n    \n    \n              \n      <img decoding=\"async\"\n                            src=\"https:\/\/dornsife.usc.edu\/uscseagrant\/wp-content\/uploads\/sites\/52\/2023\/11\/Screen-Shot-2023-11-16-at-4.32.41-PM-1080x0-c-default.png\"\n                    \n        \n                  alt=\"Dungeness crab juveniles in a cage\"\n        \n        \n                                      \/>\n\n    \n    \n  \n  \n\n<\/div>\n\n      <\/div>\n                <div id=\"photo-2132038137\" class=\"photo-lightbox lity-hide\">\n        <div class=\"text-container\">\n          \n                          \n<div class=\"f--field f--description\">\n\n    \n  <p><br data-mce-bogus=\"1\"><\/p>\n\n\n\n<\/div>\n          \n                  <\/div>\n\n        \n            \n<div class=\"f--field f--image\">\n\n    \n    \n    \n    \n    \n    \n              \n      <img decoding=\"async\"\n                            src=\"https:\/\/dornsife.usc.edu\/uscseagrant\/wp-content\/uploads\/sites\/52\/2023\/11\/Biological_effects_in_Dungeness_crabs-1-1080x0-c-default.jpg\"\n                    \n        \n                  alt=\"The impact of ocean acidification (low pH) and hypoxia (low DO) on the exoskeleton dissolution of juvenile Dungeness crabs. While low pH increases dissolution, the negative effect is exacerbated under interaction of both stressors (low pH\/low DO).\"\n        \n        \n                                      \/>\n\n    \n    \n  \n  \n\n<\/div>\n\n      <\/div>\n            \n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":74,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-content-detail.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-1960","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Struggling Sea Urchins - USC Sea Grant<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dornsife.usc.edu\/uscseagrant\/struggling-sea-urchins\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Struggling Sea Urchins - USC Sea Grant\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dornsife.usc.edu\/uscseagrant\/struggling-sea-urchins\/\" \/>\n<meta property=\"og:site_name\" content=\"USC Sea Grant\" \/>\n<meta property=\"article:modified_time\" content=\"2024-06-27T17:32:16+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/dornsife.usc.edu\/uscseagrant\/struggling-sea-urchins\/\",\"url\":\"https:\/\/dornsife.usc.edu\/uscseagrant\/struggling-sea-urchins\/\",\"name\":\"Struggling Sea Urchins - USC Sea Grant\",\"isPartOf\":{\"@id\":\"https:\/\/dornsife.usc.edu\/uscseagrant\/#website\"},\"datePublished\":\"2023-11-01T20:47:38+00:00\",\"dateModified\":\"2024-06-27T17:32:16+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/dornsife.usc.edu\/uscseagrant\/struggling-sea-urchins\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/dornsife.usc.edu\/uscseagrant\/struggling-sea-urchins\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/dornsife.usc.edu\/uscseagrant\/struggling-sea-urchins\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/dornsife.usc.edu\/uscseagrant\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Struggling Sea Urchins\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/dornsife.usc.edu\/uscseagrant\/#website\",\"url\":\"https:\/\/dornsife.usc.edu\/uscseagrant\/\",\"name\":\"USC Sea Grant\",\"description\":\"USC Dornsife The Urban Ocean Program\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/dornsife.usc.edu\/uscseagrant\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Struggling Sea Urchins - 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