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

Detalhes bibliográficos
Autor(a) principal: Garcia, A. M.
Data de Publicação: 2017
Outros Autores: Winemiller, K. O., Hoeinghaus, D. J., Claudino, M. C., Bastos, R., Correa, F., Huckembeck, S., Vieira, J., Loebmann, D., Abreu, P., Ducatti, C. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.3354/meps12060
http://hdl.handle.net/11449/165524
Resumo: Resource 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.
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spelling Hydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystemBasal resourceBayesian mixing modelBiomass assimilationEstuaryHydrologic connectivityProduction sourceSalinityTrophic ecologyResource 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.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)International Foundation of Science, IFSICMBIOUS National Science FoundationRio Grande Fed Univ, Oceanog Inst, BR-96203900 Rio Grande, RS, BrazilTexas A&M Univ, Dept Wildlife & Fisheries Sci, College Stn, TX 77843 USATexas A&M Univ, Interdisciplinary Program Ecol & Evolutionary Bio, College Stn, TX 77843 USAUniv North Texas, Dept Biol Sci, Denton, TX 76203 USAUniv North Texas, Adv Environm Res Inst, Denton, TX 76203 USAPaulista Julio de Mesquita Filho State Univ, Stable Isotope Ctr Environm & Life Sci, Biosci Inst, BR-18608000 Botucatu, SP, BrazilPaulista Julio de Mesquita Filho State Univ, Stable Isotope Ctr Environm & Life Sci, Biosci Inst, BR-18608000 Botucatu, SP, BrazilCNPq: 482920/2007-6CNPq: 305888/2012-9International Foundation of Science, IFS: A/4419-1ICMBIO: 14523-2ICMBIO: 14523-4US National Science Foundation: DEB 1257813US National Science Foundation: IGERT 0654377Inter-researchRio Grande Fed UnivTexas A&M UnivUniv North TexasUniversidade Estadual Paulista (Unesp)Garcia, A. M.Winemiller, K. O.Hoeinghaus, D. J.Claudino, M. C.Bastos, R.Correa, F.Huckembeck, S.Vieira, J.Loebmann, D.Abreu, P.Ducatti, C. [UNESP]2018-11-28T06:17:53Z2018-11-28T06:17:53Z2017-03-13info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article17-28application/pdfhttp://dx.doi.org/10.3354/meps12060Marine Ecology Progress Series. Oldendorf Luhe: Inter-research, v. 567, p. 17-28, 2017.0171-8630http://hdl.handle.net/11449/16552410.3354/meps12060WOS:000397823100002WOS000397823100002.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMarine Ecology Progress Series1,289info:eu-repo/semantics/openAccess2023-11-11T06:14:03Zoai:repositorio.unesp.br:11449/165524Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-11T06:14:03Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Hydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystem
title Hydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystem
spellingShingle Hydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystem
Garcia, A. M.
Basal resource
Bayesian mixing model
Biomass assimilation
Estuary
Hydrologic connectivity
Production source
Salinity
Trophic ecology
title_short Hydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystem
title_full Hydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystem
title_fullStr Hydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystem
title_full_unstemmed Hydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystem
title_sort Hydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystem
author Garcia, A. M.
author_facet Garcia, A. M.
Winemiller, K. O.
Hoeinghaus, D. J.
Claudino, M. C.
Bastos, R.
Correa, F.
Huckembeck, S.
Vieira, J.
Loebmann, D.
Abreu, P.
Ducatti, C. [UNESP]
author_role author
author2 Winemiller, K. O.
Hoeinghaus, D. J.
Claudino, M. C.
Bastos, R.
Correa, F.
Huckembeck, S.
Vieira, J.
Loebmann, D.
Abreu, P.
Ducatti, C. [UNESP]
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Rio Grande Fed Univ
Texas A&M Univ
Univ North Texas
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Garcia, A. M.
Winemiller, K. O.
Hoeinghaus, D. J.
Claudino, M. C.
Bastos, R.
Correa, F.
Huckembeck, S.
Vieira, J.
Loebmann, D.
Abreu, P.
Ducatti, C. [UNESP]
dc.subject.por.fl_str_mv Basal resource
Bayesian mixing model
Biomass assimilation
Estuary
Hydrologic connectivity
Production source
Salinity
Trophic ecology
topic Basal resource
Bayesian mixing model
Biomass assimilation
Estuary
Hydrologic connectivity
Production source
Salinity
Trophic ecology
description Resource 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.
publishDate 2017
dc.date.none.fl_str_mv 2017-03-13
2018-11-28T06:17:53Z
2018-11-28T06:17:53Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.3354/meps12060
Marine Ecology Progress Series. Oldendorf Luhe: Inter-research, v. 567, p. 17-28, 2017.
0171-8630
http://hdl.handle.net/11449/165524
10.3354/meps12060
WOS:000397823100002
WOS000397823100002.pdf
url http://dx.doi.org/10.3354/meps12060
http://hdl.handle.net/11449/165524
identifier_str_mv Marine Ecology Progress Series. Oldendorf Luhe: Inter-research, v. 567, p. 17-28, 2017.
0171-8630
10.3354/meps12060
WOS:000397823100002
WOS000397823100002.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Marine Ecology Progress Series
1,289
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 17-28
application/pdf
dc.publisher.none.fl_str_mv Inter-research
publisher.none.fl_str_mv Inter-research
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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