{"id":349,"date":"2010-01-29T14:56:12","date_gmt":"2010-01-29T14:56:12","guid":{"rendered":"http:\/\/www.reefrelieffounders.com\/science\/?p=349"},"modified":"2010-01-29T14:56:48","modified_gmt":"2010-01-29T14:56:48","slug":"environment-science-technology-nitrogen-isotopic-records-of-terrestrial-pollution-encoded-in-floridian-and-bahamian-gorgonian-corals-by-o-sherwood-b-e-lapointe-m-risk-a-jamieson","status":"publish","type":"post","link":"https:\/\/www.reefrelieffounders.com\/science\/2010\/01\/29\/environment-science-technology-nitrogen-isotopic-records-of-terrestrial-pollution-encoded-in-floridian-and-bahamian-gorgonian-corals-by-o-sherwood-b-e-lapointe-m-risk-a-jamieson\/","title":{"rendered":"Environment, Science & Technology: Nitrogen Isotopic Records of Terrestrial Pollution Encoded in Floridian and Bahamian Gorgonian Corals by O. Sherwood, B.E. Lapointe, M. Risk, A. Jamieson"},"content":{"rendered":"
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http:\/\/pubs.acs.org\/doi\/abs\/10.1021\/es9018404<\/a><\/h2>\n

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Owen A.\u00a0Sherwood*<\/a>\u2020<\/sup><\/a>, Brian E.\u00a0Lapointe\u2021<\/sup><\/a>, Michael J.\u00a0Risk\u00a7<\/sup><\/a> and Robyn E.\u00a0Jamieson<\/div>\n
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Department of Biology, Memorial University of Newfoundland, 300 Prince Phillip Avenue, St. John\u2019s, NL, A1B3X9, Canada; Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida 34946; School of Geography and Earth Sciences, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada; and Fisheries & Oceans Canada, Ecological Sciences Section, P.O. Box 5667, 80 East White Hills Road, St. John\u2019s NL A1C5X1, Canada<\/div>\n<\/div>\n
Environ. Sci. Technol.<\/cite>, 2010, 44 (3), pp 874\u2013880<\/div>\n
DOI: <\/strong>10.1021\/es9018404<\/div>\n
Publication Date (Web): January 7, 2010<\/div>\n
Copyright \u00a9 2010 American Chemical Society<\/div>\n

Abstract<\/h2>\n

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Stable nitrogen isotope (\u03b415<\/sup>N) analysis has proven an effective \u201cfingerprint\u201d of sewage contamination in coral reef environments; however, short-term variability in nitrogen cycling and isotopic fractionation may obscure long-term trends. Here, we examine \u03b415<\/sup>N signatures in the organic endoskeletons of long-lived (20\u221240 years) gorgonian corals. Specimens were collected from relatively pristine reefs off Green Turtle Cay, Bahamas, and from reefs off southeast Florida heavily impacted by multiple sources of anthropogenic nitrogen. The \u03b415<\/sup>N of the most recently grown skeleton (branch tips) ranged from +2 to +3 \u2030 at Green Turtle Cay, and +4.5 to +10 \u2030 off Florida. These values closely match the \u03b415<\/sup>N of macroalgae collected from the same locations, indicating that gorgonian corals are isotopically similar to primary producers, and therefore suitable for assessing sources of dissolved inorganic nitrogen. Differences in the \u03b415<\/sup>N between younger and older skeleton indicated an overall decline of \u22120.34 \u00b1 0.06 \u2030 (1 s.e) over the last 20 \u2212 40 years at Green Turtle Cay, reflecting a possible increase in nitrogen fixation and\/or atmospheric deposition of anthropogenic nitrogen. Off southeast Florida, there was an overall increase in \u03b415<\/sup>N over the same time period, reflecting increasing wastewater discharges from the rapidly growing population. These results highlight the usefulness of \u03b415<\/sup>N recorded in gorgonians and other long-lived organisms in assessing spatiotemporal patterns of nitrogen sources to coastal marine environments.<\/p>\n

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http:\/\/pubs.acs.org\/doi\/abs\/10.1021\/es9018404 Owen A.\u00a0Sherwood*\u2020, Brian E.\u00a0Lapointe\u2021, Michael J.\u00a0Risk\u00a7 and Robyn E.\u00a0Jamieson Department of Biology, Memorial University of Newfoundland, 300 Prince Phillip Avenue, St. John\u2019s, NL, A1B3X9, Canada; Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida 34946; School of Geography and Earth Sciences, McMaster University, 1280 Main Street West, Hamilton, … Continue reading Environment, Science & Technology: Nitrogen Isotopic Records of Terrestrial Pollution Encoded in Floridian and Bahamian Gorgonian Corals by O. Sherwood, B.E. Lapointe, M. Risk, A. Jamieson<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[1],"tags":[],"class_list":["post-349","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.reefrelieffounders.com\/science\/wp-json\/wp\/v2\/posts\/349","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.reefrelieffounders.com\/science\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.reefrelieffounders.com\/science\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.reefrelieffounders.com\/science\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.reefrelieffounders.com\/science\/wp-json\/wp\/v2\/comments?post=349"}],"version-history":[{"count":8,"href":"https:\/\/www.reefrelieffounders.com\/science\/wp-json\/wp\/v2\/posts\/349\/revisions"}],"predecessor-version":[{"id":358,"href":"https:\/\/www.reefrelieffounders.com\/science\/wp-json\/wp\/v2\/posts\/349\/revisions\/358"}],"wp:attachment":[{"href":"https:\/\/www.reefrelieffounders.com\/science\/wp-json\/wp\/v2\/media?parent=349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.reefrelieffounders.com\/science\/wp-json\/wp\/v2\/categories?post=349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.reefrelieffounders.com\/science\/wp-json\/wp\/v2\/tags?post=349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}