Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach
- Autores
- Alurralde, Roque Gastón; Fuentes, Verónica Lorena; De Troch, Marleen; Tatian, Marcos
- Año de publicación
- 2020
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We examined the effect of glacial melt-related retreat environmental conditions on the spatial heterogeneity of food sources for Antarctic nearshore marine benthic communities of Potter Cove, a representative fjord on King George Island on the West Antarctic Peninsula. Focusing on Antarctic suspension feeders, we surveyed the variation of carbon (δ13C) and nitrogen (δ15N) stable isotopes in three different stations with contrasting characteristics in terms of glacier-sedimentary regimes and distance from the glacier. Bayesian mixing models were used to estimate the relative contribution of eight potential food sources at the study sites and to the consumers' diet. The isotopically signatures of suspension feeders displayed a broad range of assimilate available food sources with distinct contributions at each site. Overall, for most of the suspension feeders analysed, contributions of suspended particulate matter and macroalgae detritus tended to prevail over the rest of the potential food sources. Additionally, we confirm the assimilation of krill faeces by benthic organisms reinforcing its relevance as food source in nearshore Antarctic ecosystems. Mixing models corroborated the influence of glacier discharge on the spatial distribution of available food sources, since their contribution in the suspension feeders diet was different and more heterogeneous in the internal stations (ice-proximal zone) than in the external one (ice-distal zone). The analysis of isotopic signatures of primary benthic consumers (suspension feeders) indicated the spatial heterogeneity of food sources and its composition in coastal Antarctic nearshore, as consequence of the glacial influence on the local environment and hydrology.
Fil: Alurralde, Roque Gastón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina
Fil: Fuentes, Verónica Lorena. Consejo Superior de Investigaciones Científicas. Instituto de Ciencias del Mar; España. Universidad de Buenos Aires. Facultad de Cienicas Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Cátedra de Introducción a la Zoología; Argentina
Fil: De Troch, Marleen. University of Ghent; Bélgica
Fil: Tatian, Marcos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina - Materia
-
BENTHIC SUSPENSION FEEDERS
CLIMATE CHANGE
FOOD SOURCES
GLACIAL MELTING
ISOTOPIC ANALYSIS
POTTER COVE
SPATIAL HETEROGENEITY
WESTERN ANTARCTIC PENINSULA - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/142986
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Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approachAlurralde, Roque GastónFuentes, Verónica LorenaDe Troch, MarleenTatian, MarcosBENTHIC SUSPENSION FEEDERSCLIMATE CHANGEFOOD SOURCESGLACIAL MELTINGISOTOPIC ANALYSISPOTTER COVESPATIAL HETEROGENEITYWESTERN ANTARCTIC PENINSULAhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1We examined the effect of glacial melt-related retreat environmental conditions on the spatial heterogeneity of food sources for Antarctic nearshore marine benthic communities of Potter Cove, a representative fjord on King George Island on the West Antarctic Peninsula. Focusing on Antarctic suspension feeders, we surveyed the variation of carbon (δ13C) and nitrogen (δ15N) stable isotopes in three different stations with contrasting characteristics in terms of glacier-sedimentary regimes and distance from the glacier. Bayesian mixing models were used to estimate the relative contribution of eight potential food sources at the study sites and to the consumers' diet. The isotopically signatures of suspension feeders displayed a broad range of assimilate available food sources with distinct contributions at each site. Overall, for most of the suspension feeders analysed, contributions of suspended particulate matter and macroalgae detritus tended to prevail over the rest of the potential food sources. Additionally, we confirm the assimilation of krill faeces by benthic organisms reinforcing its relevance as food source in nearshore Antarctic ecosystems. Mixing models corroborated the influence of glacier discharge on the spatial distribution of available food sources, since their contribution in the suspension feeders diet was different and more heterogeneous in the internal stations (ice-proximal zone) than in the external one (ice-distal zone). The analysis of isotopic signatures of primary benthic consumers (suspension feeders) indicated the spatial heterogeneity of food sources and its composition in coastal Antarctic nearshore, as consequence of the glacial influence on the local environment and hydrology.Fil: Alurralde, Roque Gastón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; ArgentinaFil: Fuentes, Verónica Lorena. Consejo Superior de Investigaciones Científicas. Instituto de Ciencias del Mar; España. Universidad de Buenos Aires. Facultad de Cienicas Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Cátedra de Introducción a la Zoología; ArgentinaFil: De Troch, Marleen. University of Ghent; BélgicaFil: Tatian, Marcos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; ArgentinaElsevier Science2020-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/142986Alurralde, Roque Gastón; Fuentes, Verónica Lorena; De Troch, Marleen; Tatian, Marcos; Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach; Elsevier Science; Ecological Indicators; 115; 8-2020; 1-121470-160XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S1470160X20303150info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecolind.2020.106378info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:50:30Zoai:ri.conicet.gov.ar:11336/142986instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:50:31.043CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach |
title |
Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach |
spellingShingle |
Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach Alurralde, Roque Gastón BENTHIC SUSPENSION FEEDERS CLIMATE CHANGE FOOD SOURCES GLACIAL MELTING ISOTOPIC ANALYSIS POTTER COVE SPATIAL HETEROGENEITY WESTERN ANTARCTIC PENINSULA |
title_short |
Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach |
title_full |
Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach |
title_fullStr |
Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach |
title_full_unstemmed |
Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach |
title_sort |
Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach |
dc.creator.none.fl_str_mv |
Alurralde, Roque Gastón Fuentes, Verónica Lorena De Troch, Marleen Tatian, Marcos |
author |
Alurralde, Roque Gastón |
author_facet |
Alurralde, Roque Gastón Fuentes, Verónica Lorena De Troch, Marleen Tatian, Marcos |
author_role |
author |
author2 |
Fuentes, Verónica Lorena De Troch, Marleen Tatian, Marcos |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
BENTHIC SUSPENSION FEEDERS CLIMATE CHANGE FOOD SOURCES GLACIAL MELTING ISOTOPIC ANALYSIS POTTER COVE SPATIAL HETEROGENEITY WESTERN ANTARCTIC PENINSULA |
topic |
BENTHIC SUSPENSION FEEDERS CLIMATE CHANGE FOOD SOURCES GLACIAL MELTING ISOTOPIC ANALYSIS POTTER COVE SPATIAL HETEROGENEITY WESTERN ANTARCTIC PENINSULA |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
We examined the effect of glacial melt-related retreat environmental conditions on the spatial heterogeneity of food sources for Antarctic nearshore marine benthic communities of Potter Cove, a representative fjord on King George Island on the West Antarctic Peninsula. Focusing on Antarctic suspension feeders, we surveyed the variation of carbon (δ13C) and nitrogen (δ15N) stable isotopes in three different stations with contrasting characteristics in terms of glacier-sedimentary regimes and distance from the glacier. Bayesian mixing models were used to estimate the relative contribution of eight potential food sources at the study sites and to the consumers' diet. The isotopically signatures of suspension feeders displayed a broad range of assimilate available food sources with distinct contributions at each site. Overall, for most of the suspension feeders analysed, contributions of suspended particulate matter and macroalgae detritus tended to prevail over the rest of the potential food sources. Additionally, we confirm the assimilation of krill faeces by benthic organisms reinforcing its relevance as food source in nearshore Antarctic ecosystems. Mixing models corroborated the influence of glacier discharge on the spatial distribution of available food sources, since their contribution in the suspension feeders diet was different and more heterogeneous in the internal stations (ice-proximal zone) than in the external one (ice-distal zone). The analysis of isotopic signatures of primary benthic consumers (suspension feeders) indicated the spatial heterogeneity of food sources and its composition in coastal Antarctic nearshore, as consequence of the glacial influence on the local environment and hydrology. Fil: Alurralde, Roque Gastón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina Fil: Fuentes, Verónica Lorena. Consejo Superior de Investigaciones Científicas. Instituto de Ciencias del Mar; España. Universidad de Buenos Aires. Facultad de Cienicas Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Cátedra de Introducción a la Zoología; Argentina Fil: De Troch, Marleen. University of Ghent; Bélgica Fil: Tatian, Marcos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina |
description |
We examined the effect of glacial melt-related retreat environmental conditions on the spatial heterogeneity of food sources for Antarctic nearshore marine benthic communities of Potter Cove, a representative fjord on King George Island on the West Antarctic Peninsula. Focusing on Antarctic suspension feeders, we surveyed the variation of carbon (δ13C) and nitrogen (δ15N) stable isotopes in three different stations with contrasting characteristics in terms of glacier-sedimentary regimes and distance from the glacier. Bayesian mixing models were used to estimate the relative contribution of eight potential food sources at the study sites and to the consumers' diet. The isotopically signatures of suspension feeders displayed a broad range of assimilate available food sources with distinct contributions at each site. Overall, for most of the suspension feeders analysed, contributions of suspended particulate matter and macroalgae detritus tended to prevail over the rest of the potential food sources. Additionally, we confirm the assimilation of krill faeces by benthic organisms reinforcing its relevance as food source in nearshore Antarctic ecosystems. Mixing models corroborated the influence of glacier discharge on the spatial distribution of available food sources, since their contribution in the suspension feeders diet was different and more heterogeneous in the internal stations (ice-proximal zone) than in the external one (ice-distal zone). The analysis of isotopic signatures of primary benthic consumers (suspension feeders) indicated the spatial heterogeneity of food sources and its composition in coastal Antarctic nearshore, as consequence of the glacial influence on the local environment and hydrology. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-08 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/142986 Alurralde, Roque Gastón; Fuentes, Verónica Lorena; De Troch, Marleen; Tatian, Marcos; Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach; Elsevier Science; Ecological Indicators; 115; 8-2020; 1-12 1470-160X CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/142986 |
identifier_str_mv |
Alurralde, Roque Gastón; Fuentes, Verónica Lorena; De Troch, Marleen; Tatian, Marcos; Suspension feeders as natural sentinels of the spatial variability in food sources in an Antarctic fjord: A stable isotope approach; Elsevier Science; Ecological Indicators; 115; 8-2020; 1-12 1470-160X CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S1470160X20303150 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecolind.2020.106378 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier Science |
publisher.none.fl_str_mv |
Elsevier Science |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613557083176960 |
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13.070432 |