Hydrologic pulsing promotes spatial connectivity and food web subsidies in a subtropical coastal ecosystem
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , , , , |
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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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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1799964898436841472 |