Trophic interactions and food web structure of a subantarctic marine food web in the Beagle Channel: Bahía Lapataia, Argentina
Basic ecological knowledge regarding the importance of different sources of primary production and how it is transferred among consumer species is required to properly manage and conserve subpolar ecosystems that are particularly vulnerable to environmental changes. We used carbon (δ13C) and nitroge...
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ftconicet:oai:ri.conicet.gov.ar:11336/94679 2023-10-09T21:55:27+02:00 Trophic interactions and food web structure of a subantarctic marine food web in the Beagle Channel: Bahía Lapataia, Argentina Riccialdelli, Luciana Newsome, Seth D. Fogel, Marilyn L. Fernandez, Daniel Alfredo application/pdf http://hdl.handle.net/11336/94679 eng eng Springer info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s00300-016-2007-x info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-016-2007-x http://hdl.handle.net/11336/94679 Riccialdelli, Luciana; Newsome, Seth D.; Fogel, Marilyn L.; Fernandez, Daniel Alfredo; Trophic interactions and food web structure of a subantarctic marine food web in the Beagle Channel: Bahía Lapataia, Argentina; Springer; Polar Biology; 40; 4; 4-2017; 807-821 0722-4060 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ BIOLOGICAL BASELINE DATA COMMUNITY STRUCTURE FOOD WEB TROPHIC LEVEL d13C https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1007/s00300-016-2007-x 2023-09-24T19:28:17Z Basic ecological knowledge regarding the importance of different sources of primary production and how it is transferred among consumer species is required to properly manage and conserve subpolar ecosystems that are particularly vulnerable to environmental changes. We used carbon (δ13C) and nitrogen (δ15N) stable isotope analysis to establish a baseline of species interactions and food web structure for the nearshore marine community in Bahia Lapataia, Argentina, an ecosystem that faces many threats, including a recent invasion of exotic chinook salmon. Primary producers and other organic sources (e.g., particulate organic matter) available to the food web were isotopically distinct and had a wide range in δ13C (−31.3 to −5.3 ‰) and δ15N (−0.5 to 13.1 ‰) values. Consumers also showed a wide range of isotope values with mean δ13C and δ15N values ranging from −20.8 to −12.3 ‰ and from 10.5 to 19.6 ‰, respectively. A cluster analysis of these isotope data correctly identified functional groups and expected interactions among species based on independent information. Using Bayesian isotope mixing models, we estimated that the proportional contribution of benthic production, in particular through grazing and the consumption of detritus, was a more important source of energy for primary and secondary consumers than pelagic production. Using stable isotope analysis to continually monitor species interactions and food web structure may prove to be a valuable research and management tool for assessing ecological consequences of different threats in this and other subpolar ecosystems. Fil: Riccialdelli, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego; Argentina Fil: Newsome, Seth D. University of New Mexico; Estados Unidos Fil: Fogel, Marilyn L. University of California; Estados Unidos Fil: Fernandez, Daniel Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de ... Article in Journal/Newspaper Polar Biology Tierra del Fuego CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Austral Argentina Fernandez ENVELOPE(-62.233,-62.233,-63.250,-63.250) Polar Biology 40 4 807 821 |
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Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
BIOLOGICAL BASELINE DATA COMMUNITY STRUCTURE FOOD WEB TROPHIC LEVEL d13C https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
BIOLOGICAL BASELINE DATA COMMUNITY STRUCTURE FOOD WEB TROPHIC LEVEL d13C https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Riccialdelli, Luciana Newsome, Seth D. Fogel, Marilyn L. Fernandez, Daniel Alfredo Trophic interactions and food web structure of a subantarctic marine food web in the Beagle Channel: Bahía Lapataia, Argentina |
topic_facet |
BIOLOGICAL BASELINE DATA COMMUNITY STRUCTURE FOOD WEB TROPHIC LEVEL d13C https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Basic ecological knowledge regarding the importance of different sources of primary production and how it is transferred among consumer species is required to properly manage and conserve subpolar ecosystems that are particularly vulnerable to environmental changes. We used carbon (δ13C) and nitrogen (δ15N) stable isotope analysis to establish a baseline of species interactions and food web structure for the nearshore marine community in Bahia Lapataia, Argentina, an ecosystem that faces many threats, including a recent invasion of exotic chinook salmon. Primary producers and other organic sources (e.g., particulate organic matter) available to the food web were isotopically distinct and had a wide range in δ13C (−31.3 to −5.3 ‰) and δ15N (−0.5 to 13.1 ‰) values. Consumers also showed a wide range of isotope values with mean δ13C and δ15N values ranging from −20.8 to −12.3 ‰ and from 10.5 to 19.6 ‰, respectively. A cluster analysis of these isotope data correctly identified functional groups and expected interactions among species based on independent information. Using Bayesian isotope mixing models, we estimated that the proportional contribution of benthic production, in particular through grazing and the consumption of detritus, was a more important source of energy for primary and secondary consumers than pelagic production. Using stable isotope analysis to continually monitor species interactions and food web structure may prove to be a valuable research and management tool for assessing ecological consequences of different threats in this and other subpolar ecosystems. Fil: Riccialdelli, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego; Argentina Fil: Newsome, Seth D. University of New Mexico; Estados Unidos Fil: Fogel, Marilyn L. University of California; Estados Unidos Fil: Fernandez, Daniel Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de ... |
format |
Article in Journal/Newspaper |
author |
Riccialdelli, Luciana Newsome, Seth D. Fogel, Marilyn L. Fernandez, Daniel Alfredo |
author_facet |
Riccialdelli, Luciana Newsome, Seth D. Fogel, Marilyn L. Fernandez, Daniel Alfredo |
author_sort |
Riccialdelli, Luciana |
title |
Trophic interactions and food web structure of a subantarctic marine food web in the Beagle Channel: Bahía Lapataia, Argentina |
title_short |
Trophic interactions and food web structure of a subantarctic marine food web in the Beagle Channel: Bahía Lapataia, Argentina |
title_full |
Trophic interactions and food web structure of a subantarctic marine food web in the Beagle Channel: Bahía Lapataia, Argentina |
title_fullStr |
Trophic interactions and food web structure of a subantarctic marine food web in the Beagle Channel: Bahía Lapataia, Argentina |
title_full_unstemmed |
Trophic interactions and food web structure of a subantarctic marine food web in the Beagle Channel: Bahía Lapataia, Argentina |
title_sort |
trophic interactions and food web structure of a subantarctic marine food web in the beagle channel: bahía lapataia, argentina |
publisher |
Springer |
url |
http://hdl.handle.net/11336/94679 |
long_lat |
ENVELOPE(-62.233,-62.233,-63.250,-63.250) |
geographic |
Austral Argentina Fernandez |
geographic_facet |
Austral Argentina Fernandez |
genre |
Polar Biology Tierra del Fuego |
genre_facet |
Polar Biology Tierra del Fuego |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s00300-016-2007-x info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-016-2007-x http://hdl.handle.net/11336/94679 Riccialdelli, Luciana; Newsome, Seth D.; Fogel, Marilyn L.; Fernandez, Daniel Alfredo; Trophic interactions and food web structure of a subantarctic marine food web in the Beagle Channel: Bahía Lapataia, Argentina; Springer; Polar Biology; 40; 4; 4-2017; 807-821 0722-4060 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1007/s00300-016-2007-x |
container_title |
Polar Biology |
container_volume |
40 |
container_issue |
4 |
container_start_page |
807 |
op_container_end_page |
821 |
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1779319365486772224 |