What difference does a century make? Shifts in the ecosystem structure of the Ross Sea, Antarctica, as evidenced from a sentinel species, the Weddell seal
The arrival of humans to Antarctica's Ross Sea (100+ years ago) led to a slow, but sustained increase in human activities in the area. To investigate if human presence has influenced the structure of the ecosystem over the last century, we compared historical (ca 100 years old) and modern sampl...
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ftcdlib:oai:escholarship.org:ark:/13030/qt3sn623wf 2023-09-05T13:12:54+02:00 What difference does a century make? Shifts in the ecosystem structure of the Ross Sea, Antarctica, as evidenced from a sentinel species, the Weddell seal Hückstädt, Luis A McCarthy, Matthew D Koch, Paul L Costa, Daniel P 20170927 2017-08-30 application/pdf https://escholarship.org/uc/item/3sn623wf unknown eScholarship, University of California qt3sn623wf https://escholarship.org/uc/item/3sn623wf public Proceedings of the Royal Society B, vol 284, iss 1861 Animals Antarctic Regions Ecosystem Food Chain Isotopes Seals Earless Sentinel Species Time Factors stable isotope analysis compound-specific stable isotope analysis delta C-13 delta N-15 historical ecology Leptonychotes weddellii δ13C δ15N Biological Sciences Agricultural and Veterinary Sciences Medical and Health Sciences article 2017 ftcdlib 2023-08-21T18:03:44Z The arrival of humans to Antarctica's Ross Sea (100+ years ago) led to a slow, but sustained increase in human activities in the area. To investigate if human presence has influenced the structure of the ecosystem over the last century, we compared historical (ca 100 years old) and modern samples of a sentinel species, the Weddell seal (Leptonychotes weddellii), using both bulk tissue and compound-specific stable isotope analysis. The historical isotopic niche of Weddell seals was over five times larger than the modern niche. The isotopic values of individual amino acids showed a clear segregation between historical and modern samples, indicative of differences at the base of the trophic web. Further, we found no significant differences in the trophic position of Weddell seals between the two periods. Our study revealed that the Ross Sea has undergone detectable changes (i.e. in the primary producers community) in the last century, but the presence of humans has not disrupted trophic interactions supporting Weddell seals. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Weddell Seal Weddell Seals University of California: eScholarship Antarctic Ross Sea Weddell |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Animals Antarctic Regions Ecosystem Food Chain Isotopes Seals Earless Sentinel Species Time Factors stable isotope analysis compound-specific stable isotope analysis delta C-13 delta N-15 historical ecology Leptonychotes weddellii δ13C δ15N Biological Sciences Agricultural and Veterinary Sciences Medical and Health Sciences |
spellingShingle |
Animals Antarctic Regions Ecosystem Food Chain Isotopes Seals Earless Sentinel Species Time Factors stable isotope analysis compound-specific stable isotope analysis delta C-13 delta N-15 historical ecology Leptonychotes weddellii δ13C δ15N Biological Sciences Agricultural and Veterinary Sciences Medical and Health Sciences Hückstädt, Luis A McCarthy, Matthew D Koch, Paul L Costa, Daniel P What difference does a century make? Shifts in the ecosystem structure of the Ross Sea, Antarctica, as evidenced from a sentinel species, the Weddell seal |
topic_facet |
Animals Antarctic Regions Ecosystem Food Chain Isotopes Seals Earless Sentinel Species Time Factors stable isotope analysis compound-specific stable isotope analysis delta C-13 delta N-15 historical ecology Leptonychotes weddellii δ13C δ15N Biological Sciences Agricultural and Veterinary Sciences Medical and Health Sciences |
description |
The arrival of humans to Antarctica's Ross Sea (100+ years ago) led to a slow, but sustained increase in human activities in the area. To investigate if human presence has influenced the structure of the ecosystem over the last century, we compared historical (ca 100 years old) and modern samples of a sentinel species, the Weddell seal (Leptonychotes weddellii), using both bulk tissue and compound-specific stable isotope analysis. The historical isotopic niche of Weddell seals was over five times larger than the modern niche. The isotopic values of individual amino acids showed a clear segregation between historical and modern samples, indicative of differences at the base of the trophic web. Further, we found no significant differences in the trophic position of Weddell seals between the two periods. Our study revealed that the Ross Sea has undergone detectable changes (i.e. in the primary producers community) in the last century, but the presence of humans has not disrupted trophic interactions supporting Weddell seals. |
format |
Article in Journal/Newspaper |
author |
Hückstädt, Luis A McCarthy, Matthew D Koch, Paul L Costa, Daniel P |
author_facet |
Hückstädt, Luis A McCarthy, Matthew D Koch, Paul L Costa, Daniel P |
author_sort |
Hückstädt, Luis A |
title |
What difference does a century make? Shifts in the ecosystem structure of the Ross Sea, Antarctica, as evidenced from a sentinel species, the Weddell seal |
title_short |
What difference does a century make? Shifts in the ecosystem structure of the Ross Sea, Antarctica, as evidenced from a sentinel species, the Weddell seal |
title_full |
What difference does a century make? Shifts in the ecosystem structure of the Ross Sea, Antarctica, as evidenced from a sentinel species, the Weddell seal |
title_fullStr |
What difference does a century make? Shifts in the ecosystem structure of the Ross Sea, Antarctica, as evidenced from a sentinel species, the Weddell seal |
title_full_unstemmed |
What difference does a century make? Shifts in the ecosystem structure of the Ross Sea, Antarctica, as evidenced from a sentinel species, the Weddell seal |
title_sort |
what difference does a century make? shifts in the ecosystem structure of the ross sea, antarctica, as evidenced from a sentinel species, the weddell seal |
publisher |
eScholarship, University of California |
publishDate |
2017 |
url |
https://escholarship.org/uc/item/3sn623wf |
op_coverage |
20170927 |
geographic |
Antarctic Ross Sea Weddell |
geographic_facet |
Antarctic Ross Sea Weddell |
genre |
Antarc* Antarctic Antarctica Ross Sea Weddell Seal Weddell Seals |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Weddell Seal Weddell Seals |
op_source |
Proceedings of the Royal Society B, vol 284, iss 1861 |
op_relation |
qt3sn623wf https://escholarship.org/uc/item/3sn623wf |
op_rights |
public |
_version_ |
1776202272227721216 |