Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan
Trophic structure is among the most fundamental characteristics of an ecosystem since it is a useful way to determine the main energy flow at the ecosystem level. In the Magellan Strait, the local spatial heterogeneity at the shallow-waters ecosystems may have a great variety of potential food sourc...
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Online Access: | https://epic.awi.de/id/eprint/42829/ https://epic.awi.de/id/eprint/42829/1/Andrade16_PolBiol36.pdf https://doi.org/10.1007/s00300-016-1895-0 https://hdl.handle.net/10013/epic.49397 https://hdl.handle.net/10013/epic.49397.d001 |
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ftawi:oai:epic.awi.de:42829 2024-09-09T19:12:06+00:00 Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan Andrade, Claudia Ríos, Carlos Gerdes, Dieter Brey, Thomas 2016 application/pdf https://epic.awi.de/id/eprint/42829/ https://epic.awi.de/id/eprint/42829/1/Andrade16_PolBiol36.pdf https://doi.org/10.1007/s00300-016-1895-0 https://hdl.handle.net/10013/epic.49397 https://hdl.handle.net/10013/epic.49397.d001 unknown https://epic.awi.de/id/eprint/42829/1/Andrade16_PolBiol36.pdf https://hdl.handle.net/10013/epic.49397.d001 Andrade, C. , Ríos, C. , Gerdes, D. and Brey, T. orcid:0000-0002-6345-2851 (2016) Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan , Polar Biology, 39 (12), pp. 2281-2297 . doi:10.1007/s00300-016-1895-0 <https://doi.org/10.1007/s00300-016-1895-0> , hdl:10013/epic.49397 EPIC3Polar Biology, 39(12), pp. 2281-2297, ISSN: 0722-4060 Article isiRev 2016 ftawi https://doi.org/10.1007/s00300-016-1895-0 2024-06-24T04:16:35Z Trophic structure is among the most fundamental characteristics of an ecosystem since it is a useful way to determine the main energy flow at the ecosystem level. In the Magellan Strait, the local spatial heterogeneity at the shallow-waters ecosystems may have a great variety of potential food sources; however, knowledge about their biological communities and their structure is still unclear. We examined the trophic structure of shallow-water-mixed bottom communities at two sites in the sub-Antarctic Magellan Strait based on carbon (d13 C) and nitrogen (d15 N) stable isotope ratios. The benthic communities were composed of 46 species from 20 major taxa at Bahı´a Laredo (BL) and 55 species from 18 major taxa at Punta Santa Ana (PSA). Benthic macroalgae and organic matter associated with sediment are the major primary food sources at both sites. Although both sites are quite similar in their food sources and in their vertical trophic structure (C three trophic levels), the food web structure varied distinctly. Functionally, predators and grazers dominated both communities, but top predators were shorebirds, carnivore anemones and predatory nemerteans at BL, and sea stars, shorebirds, crabs and fishes at PSA. The distinct differences in the trophic structure at BL and PSA highlight the important variability of d15 N at the base of the benthic food web, the role of local environmental conditions and community dynamics in structuring shallow-water communities. Article in Journal/Newspaper Antarc* Antarctic Polar Biology Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Polar Biology 39 12 2281 2297 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Trophic structure is among the most fundamental characteristics of an ecosystem since it is a useful way to determine the main energy flow at the ecosystem level. In the Magellan Strait, the local spatial heterogeneity at the shallow-waters ecosystems may have a great variety of potential food sources; however, knowledge about their biological communities and their structure is still unclear. We examined the trophic structure of shallow-water-mixed bottom communities at two sites in the sub-Antarctic Magellan Strait based on carbon (d13 C) and nitrogen (d15 N) stable isotope ratios. The benthic communities were composed of 46 species from 20 major taxa at Bahı´a Laredo (BL) and 55 species from 18 major taxa at Punta Santa Ana (PSA). Benthic macroalgae and organic matter associated with sediment are the major primary food sources at both sites. Although both sites are quite similar in their food sources and in their vertical trophic structure (C three trophic levels), the food web structure varied distinctly. Functionally, predators and grazers dominated both communities, but top predators were shorebirds, carnivore anemones and predatory nemerteans at BL, and sea stars, shorebirds, crabs and fishes at PSA. The distinct differences in the trophic structure at BL and PSA highlight the important variability of d15 N at the base of the benthic food web, the role of local environmental conditions and community dynamics in structuring shallow-water communities. |
format |
Article in Journal/Newspaper |
author |
Andrade, Claudia Ríos, Carlos Gerdes, Dieter Brey, Thomas |
spellingShingle |
Andrade, Claudia Ríos, Carlos Gerdes, Dieter Brey, Thomas Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan |
author_facet |
Andrade, Claudia Ríos, Carlos Gerdes, Dieter Brey, Thomas |
author_sort |
Andrade, Claudia |
title |
Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan |
title_short |
Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan |
title_full |
Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan |
title_fullStr |
Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan |
title_full_unstemmed |
Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan |
title_sort |
trophic structure of shallow-water benthic communities in the sub-antarctic strait of magellan |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/42829/ https://epic.awi.de/id/eprint/42829/1/Andrade16_PolBiol36.pdf https://doi.org/10.1007/s00300-016-1895-0 https://hdl.handle.net/10013/epic.49397 https://hdl.handle.net/10013/epic.49397.d001 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Polar Biology |
genre_facet |
Antarc* Antarctic Polar Biology |
op_source |
EPIC3Polar Biology, 39(12), pp. 2281-2297, ISSN: 0722-4060 |
op_relation |
https://epic.awi.de/id/eprint/42829/1/Andrade16_PolBiol36.pdf https://hdl.handle.net/10013/epic.49397.d001 Andrade, C. , Ríos, C. , Gerdes, D. and Brey, T. orcid:0000-0002-6345-2851 (2016) Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan , Polar Biology, 39 (12), pp. 2281-2297 . doi:10.1007/s00300-016-1895-0 <https://doi.org/10.1007/s00300-016-1895-0> , hdl:10013/epic.49397 |
op_doi |
https://doi.org/10.1007/s00300-016-1895-0 |
container_title |
Polar Biology |
container_volume |
39 |
container_issue |
12 |
container_start_page |
2281 |
op_container_end_page |
2297 |
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1809752577510735872 |