Effects of Detrital Subsidies on Soft-Sediment Ecosystem Function Are Transient and Source-Dependent.

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dc.contributor.author Gladstone-Gallagher, Rebecca en
dc.contributor.author Lohrer, Andrew M en
dc.contributor.author Lundquist, Carolyn en
dc.contributor.author Pilditch, Conrad A en
dc.date.accessioned 2018-11-15T01:30:43Z en
dc.date.issued 2016-01 en
dc.identifier.citation PLoS ONE 11(5): Article number e0154790 03 May 2016 en
dc.identifier.issn 1932-6203 en
dc.identifier.uri http://hdl.handle.net/2292/44289 en
dc.description.abstract Detrital subsidies from marine macrophytes are prevalent in temperate estuaries, and their role in structuring benthic macrofaunal communities is well documented, but the resulting impact on ecosystem function is not understood. We conducted a field experiment to test the effects of detrital decay on soft-sediment primary production, community metabolism and nutrient regeneration (measures of ecosystem function). Twenty four (2 m(2)) plots were established on an intertidal sandflat, to which we added 0 or 220 g DW m(-2) of detritus from either mangroves (Avicennia marina), seagrass (Zostera muelleri), or kelp (Ecklonia radiata) (n = 6 plots per treatment). Then, after 4, 17 and 46 d we measured ecosystem function, macrofaunal community structure and sediment properties. We hypothesized that (1) detrital decay would stimulate benthic primary production either by supplying nutrients to the benthic macrophytes, or by altering the macrofaunal community; and (2) ecosystem responses would depend on the stage and rate of macrophyte decay (a function of source). Avicennia detritus decayed the slowest with a half-life (t50) of 46 d, while Zostera and Ecklonia had t50 values of 28 and 2.6 d, respectively. However, ecosystem responses were not related to these differences. Instead, we found transient effects (up to 17 d) of Avicennia and Ecklonia detritus on benthic primary production, where initially (4 d) these detrital sources suppressed primary production, but after 17 d, primary production was stimulated in Avicennia plots relative to controls. Other ecosystem function response variables and the macrofaunal community composition were not altered by the addition of detritus, but did vary with time. By sampling ecosystem function temporally, we were able to capture the in situ transient effects of detrital subsidies on important benthic ecosystem functions. en
dc.format.medium Electronic-eCollection en
dc.language eng en
dc.relation.ispartofseries PloS one en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri https://creativecommons.org/licenses/by/4.0/ en
dc.subject Ecosystem en
dc.subject Geologic Sediments en
dc.subject Time Factors en
dc.subject Aquatic Organisms en
dc.title Effects of Detrital Subsidies on Soft-Sediment Ecosystem Function Are Transient and Source-Dependent. en
dc.type Journal Article en
dc.identifier.doi 10.1371/journal.pone.0154790 en
pubs.issue 5 en
pubs.begin-page e0154790 en
pubs.volume 11 en
dc.rights.holder Copyright: The authors en
dc.identifier.pmid 27138563 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Research Support, Non-U.S. Gov't en
pubs.subtype research-article en
pubs.subtype Journal Article en
pubs.elements-id 529892 en
pubs.org-id Science en
pubs.org-id Marine Science en
dc.identifier.eissn 1932-6203 en
pubs.record-created-at-source-date 2016-05-04 en
pubs.dimensions-id 27138563 en

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