Hydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystem

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dc.contributor.authorGarcia, A. M.
dc.contributor.authorWinemiller, K. O.
dc.contributor.authorHoeinghaus, D. J.
dc.contributor.authorClaudino, M. C.
dc.contributor.authorBastos, R.
dc.contributor.authorCorrea, F.
dc.contributor.authorHuckembeck, S.
dc.contributor.authorVieira, J.
dc.contributor.authorLoebmann, D.
dc.contributor.authorAbreu, P.
dc.contributor.authorDucatti, C. [UNESP]
dc.contributor.institutionRio Grande Fed Univ
dc.contributor.institutionTexas A&M Univ
dc.contributor.institutionUniv North Texas
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-11-28T06:17:53Z
dc.date.available2018-11-28T06:17:53Z
dc.date.issued2017-03-13
dc.description.abstractResource pulsing is a widespread phenomenon, but its effects on ecosystem dynamics are often difficult to predict. Hydrological pulsing, in particular, is known to influence the structure and dynamics of fluvial and coastal ecosystems, but little information is available about its effects on trophic connectivity between wetlands and estuaries. We investigated the hypothesis that hydrologic pulsing drives 1-way trophic subsidies (e.g. suspended organic matter and freshwater fish) from wetland to estuary. Our study system is a coastal lagoon with an ephemeral mouth that, when closed, stores freshwater as a sustained flood pulse that is subsequently released when a connection with the sea is reestablished. We monitored isotopic composition of consumers and food sources over the course of an entire flood pulse to infer trophic linkages and spatial subsidies. Before the flood peak (April and May), freshwater and estuarine zones were largely dependent on local primary production sources (seston and C-3 plants vs. C-4 plants and microphytobenthos, respectively), essentially functioning as disconnected compartments. A sustained pulse of freshwater inflow (June to August) induced greater habitat connectivity and a net flow of biomass and energy from the freshwater zone into the estuarine zone. The opening of the lagoon outlet channel abruptly terminated the flood pulse and reduced freshwater subsidies to estuarine consumers, and both zones returned to dependence on autochthonous production. Our findings contribute to current concerns that artificial opening of sandbars in coastal lagoons alters natural ecological dynamics with significant effects on biodiversity and ecosystem processes.en
dc.description.affiliationRio Grande Fed Univ, Oceanog Inst, BR-96203900 Rio Grande, RS, Brazil
dc.description.affiliationTexas A&M Univ, Dept Wildlife & Fisheries Sci, College Stn, TX 77843 USA
dc.description.affiliationTexas A&M Univ, Interdisciplinary Program Ecol & Evolutionary Bio, College Stn, TX 77843 USA
dc.description.affiliationUniv North Texas, Dept Biol Sci, Denton, TX 76203 USA
dc.description.affiliationUniv North Texas, Adv Environm Res Inst, Denton, TX 76203 USA
dc.description.affiliationPaulista Julio de Mesquita Filho State Univ, Stable Isotope Ctr Environm & Life Sci, Biosci Inst, BR-18608000 Botucatu, SP, Brazil
dc.description.affiliationUnespPaulista Julio de Mesquita Filho State Univ, Stable Isotope Ctr Environm & Life Sci, Biosci Inst, BR-18608000 Botucatu, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipInternational Foundation of Science, IFS
dc.description.sponsorshipICMBIO
dc.description.sponsorshipUS National Science Foundation
dc.description.sponsorshipIdCNPq: 482920/2007-6
dc.description.sponsorshipIdCNPq: 305888/2012-9
dc.description.sponsorshipIdInternational Foundation of Science, IFS: A/4419-1
dc.description.sponsorshipIdICMBIO: 14523-2
dc.description.sponsorshipIdICMBIO: 14523-4
dc.description.sponsorshipIdUS National Science Foundation: DEB 1257813
dc.description.sponsorshipIdUS National Science Foundation: IGERT 0654377
dc.format.extent17-28
dc.identifierhttp://dx.doi.org/10.3354/meps12060
dc.identifier.citationMarine Ecology Progress Series. Oldendorf Luhe: Inter-research, v. 567, p. 17-28, 2017.
dc.identifier.doi10.3354/meps12060
dc.identifier.fileWOS000397823100002.pdf
dc.identifier.issn0171-8630
dc.identifier.urihttp://hdl.handle.net/11449/165524
dc.identifier.wosWOS:000397823100002
dc.language.isoeng
dc.publisherInter-research
dc.relation.ispartofMarine Ecology Progress Series
dc.relation.ispartofsjr1,289
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectBasal resource
dc.subjectBayesian mixing model
dc.subjectBiomass assimilation
dc.subjectEstuary
dc.subjectHydrologic connectivity
dc.subjectProduction source
dc.subjectSalinity
dc.subjectTrophic ecology
dc.titleHydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystemen
dc.typeArtigo
dcterms.rightsHolderInter-research

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