{"id":295,"date":"2013-01-15T16:05:41","date_gmt":"2013-01-15T07:05:41","guid":{"rendered":"http:\/\/www.oceanecol.com\/?p=295"},"modified":"2017-07-13T22:29:13","modified_gmt":"2017-07-13T13:29:13","slug":"coral-reef-pom-dynamics-wyatt-et-al-lo","status":"publish","type":"post","link":"https:\/\/www.oceanecol.com\/?p=295","title":{"rendered":"Coral reef POM dynamics (Wyatt et al., L&#038;O)"},"content":{"rendered":"<h2><a href=\"http:\/\/onlinelibrary.wiley.com\/resolve\/doi?DOI=10.4319\/lo.2013.58.1.0409\" target=\"_blank\" rel=\"noopener\">Particulate nutrient fluxes over a fringing coral reef: Source-sink dynamics inferred from carbon to nitrogen ratios and stable isotopes<\/a><\/h2>\n<p><strong>Alex S. J. Wyatt,<\/strong> Ryan J. Lowe, Stuart Humphries\u00a0and Anya M. Waite<\/p>\n<blockquote><p>We examined spatial and temporal variations in particulate organic matter (POM) dynamics over a fringing coral reef (Ningaloo Reef) in Western Australia during the austral autumn and spring. Total POM concentrations generally did not differ between seasons or reef zones, but the composition of POM, in terms of carbon isotope ratios (<em>\u03b4<\/em><sup>13<\/sup>C-POM), carbon to nitrogen ratios (C : N), and fatty acids, changed consistently in water flowing across the reef. Both <em>\u03b4<\/em><sup>13<\/sup>C-POM and C : N increased from the fore reef to the reef flat and lagoon, \u221223.0\u2030 to \u221220.1\u2030 and 7.31 to 8.34, respectively. Average rates of net POM uptake by the reef community were highest over the reef crest (4 to 30 mmol N m<sup>\u22122<\/sup> d<sup>\u22121<\/sup> and 6 to 130 mmol C m<sup>\u22122<\/sup> d<sup>\u22121<\/sup>), with a Bayesian isotope model confirming independent measurements of high uptake rates of allochthonous POM (oceanic phyto- and zooplankton). In contrast, over the reef flat, net release of POM was observed (\u22124 to \u22125 mmol N m<sup>\u22122<\/sup> d<sup>\u22121<\/sup> and \u221250 mmol C m<sup>\u22122<\/sup> d<sup>\u22121<\/sup>), with gross release rates (estimated as \u22126 to \u22128 mmol N m<sup>\u22122<\/sup> d<sup>\u22121<\/sup> and \u221230 to \u221290 mmol C m<sup>\u22122<\/sup> d<sup>\u22121<\/sup>) indicating that the release of autochthonous POM may be of similar magnitude to allochthonous uptake. Examining POM dynamics in terms of gross fluxes reinforces the dependence of coral reef systems on oceanographic processes for allochthonous POM supply, as well as highlighting the potential for autochthonous POM production to supply nutrients to benthic and pelagic communities downstream.<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Particulate nutrient fluxes over a fringing coral reef: Source-sink dynamics inferred from carbon to nitrogen ratios and stable isotopes Alex S. J. Wyatt, Ryan J. Lowe, Stuart Humphries\u00a0and Anya M. Waite We examined spatial and temporal variations in particulate organic matter (POM) dynamics over a <a class=\"more-link\" href=\"https:\/\/www.oceanecol.com\/?p=295\">| Click for More \u2192<\/a><\/p>\n","protected":false},"author":1,"featured_media":296,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[41,24,43,63,31,53,39,40,46,44,45],"class_list":["post-295","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-papers","tag-biogeochemistry","tag-coral-reef","tag-fluxes","tag-indian-ocean","tag-isotope","tag-limnology-and-oceanography","tag-ningaloo","tag-particles","tag-pom","tag-recycling","tag-stable-isotope-analyses"],"_links":{"self":[{"href":"https:\/\/www.oceanecol.com\/index.php?rest_route=\/wp\/v2\/posts\/295","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oceanecol.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oceanecol.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oceanecol.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oceanecol.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=295"}],"version-history":[{"count":5,"href":"https:\/\/www.oceanecol.com\/index.php?rest_route=\/wp\/v2\/posts\/295\/revisions"}],"predecessor-version":[{"id":470,"href":"https:\/\/www.oceanecol.com\/index.php?rest_route=\/wp\/v2\/posts\/295\/revisions\/470"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.oceanecol.com\/index.php?rest_route=\/wp\/v2\/media\/296"}],"wp:attachment":[{"href":"https:\/\/www.oceanecol.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oceanecol.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oceanecol.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}