Between-summer comparison of particulate organic matter in surface waters of a coastal area influenced by glacier meltwater runoff and retreat
We evaluated, in two consecutive austral summers, the biochemical composition, sources, distribution and degradation state of particulate organic matter (POM) in surface coastal waters of Collins Bay, King George Island, Antarctica. Bulk elemental and stable isotope analyses were combined with molec...
Published in: | Polar Science |
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Format: | Article in Journal/Newspaper |
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ftnipr:oai:nipr.repo.nii.ac.jp:00016348 2023-05-15T13:49:00+02:00 Between-summer comparison of particulate organic matter in surface waters of a coastal area influenced by glacier meltwater runoff and retreat 2020-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16348 http://id.nii.ac.jp/1291/00016227/ en eng https://doi.org/10.1016/j.polar.2020.100603 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16348 http://id.nii.ac.jp/1291/00016227/ Polar Science, 26, 100603(2020-12) 18739652 Stable isotopes Fatty acids Amino acids Collins Bay King George Island Journal Article 2020 ftnipr https://doi.org/10.1016/j.polar.2020.100603 2022-12-03T19:43:16Z We evaluated, in two consecutive austral summers, the biochemical composition, sources, distribution and degradation state of particulate organic matter (POM) in surface coastal waters of Collins Bay, King George Island, Antarctica. Bulk elemental and stable isotope analyses were combined with molecular-level proxies (fatty acids and amino acids) to obtain more comprehensive evidence about POM characteristics. Two different settings were recognized. In February 2016, there was a reduced glacier melting condition and meltwater runoff due to cold weather. Marine fresh phytoplankton and ice-associated POM with the dominance of diatoms, bacteria, zooplankton and ice-associated fauna were the major components of POM. In contrast, in January 2017 under increased glacier melting and meltwater runoff due to warm weather conditions, suspended POM was constituted by marine phytoplankton, Rhodophyta macroalgae detritus and an increased terrestrial contribution. The lower degradation state of suspended POM in February 2016 than in January 2017 and the early bacterial response to the input of fresh protein-rich organic matter derived from marine phytoplankton, mainly diatoms, was supported. Our results provide evidence of the negative impact of glacier retreat and increased meltwater runoff on POM features in Collins Bay, which can be relevant to other Antarctic coastal marine ecosystems. Article in Journal/Newspaper Antarc* Antarctic Antarctica King George Island Polar Science Polar Science National Institute of Polar Research Repository, Japan Antarctic Austral King George Island Collins Bay ENVELOPE(-64.050,-64.050,-65.350,-65.350) Polar Science 26 100603 |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Stable isotopes Fatty acids Amino acids Collins Bay King George Island |
spellingShingle |
Stable isotopes Fatty acids Amino acids Collins Bay King George Island Between-summer comparison of particulate organic matter in surface waters of a coastal area influenced by glacier meltwater runoff and retreat |
topic_facet |
Stable isotopes Fatty acids Amino acids Collins Bay King George Island |
description |
We evaluated, in two consecutive austral summers, the biochemical composition, sources, distribution and degradation state of particulate organic matter (POM) in surface coastal waters of Collins Bay, King George Island, Antarctica. Bulk elemental and stable isotope analyses were combined with molecular-level proxies (fatty acids and amino acids) to obtain more comprehensive evidence about POM characteristics. Two different settings were recognized. In February 2016, there was a reduced glacier melting condition and meltwater runoff due to cold weather. Marine fresh phytoplankton and ice-associated POM with the dominance of diatoms, bacteria, zooplankton and ice-associated fauna were the major components of POM. In contrast, in January 2017 under increased glacier melting and meltwater runoff due to warm weather conditions, suspended POM was constituted by marine phytoplankton, Rhodophyta macroalgae detritus and an increased terrestrial contribution. The lower degradation state of suspended POM in February 2016 than in January 2017 and the early bacterial response to the input of fresh protein-rich organic matter derived from marine phytoplankton, mainly diatoms, was supported. Our results provide evidence of the negative impact of glacier retreat and increased meltwater runoff on POM features in Collins Bay, which can be relevant to other Antarctic coastal marine ecosystems. |
format |
Article in Journal/Newspaper |
title |
Between-summer comparison of particulate organic matter in surface waters of a coastal area influenced by glacier meltwater runoff and retreat |
title_short |
Between-summer comparison of particulate organic matter in surface waters of a coastal area influenced by glacier meltwater runoff and retreat |
title_full |
Between-summer comparison of particulate organic matter in surface waters of a coastal area influenced by glacier meltwater runoff and retreat |
title_fullStr |
Between-summer comparison of particulate organic matter in surface waters of a coastal area influenced by glacier meltwater runoff and retreat |
title_full_unstemmed |
Between-summer comparison of particulate organic matter in surface waters of a coastal area influenced by glacier meltwater runoff and retreat |
title_sort |
between-summer comparison of particulate organic matter in surface waters of a coastal area influenced by glacier meltwater runoff and retreat |
publishDate |
2020 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16348 http://id.nii.ac.jp/1291/00016227/ |
long_lat |
ENVELOPE(-64.050,-64.050,-65.350,-65.350) |
geographic |
Antarctic Austral King George Island Collins Bay |
geographic_facet |
Antarctic Austral King George Island Collins Bay |
genre |
Antarc* Antarctic Antarctica King George Island Polar Science Polar Science |
genre_facet |
Antarc* Antarctic Antarctica King George Island Polar Science Polar Science |
op_relation |
https://doi.org/10.1016/j.polar.2020.100603 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16348 http://id.nii.ac.jp/1291/00016227/ Polar Science, 26, 100603(2020-12) 18739652 |
op_doi |
https://doi.org/10.1016/j.polar.2020.100603 |
container_title |
Polar Science |
container_volume |
26 |
container_start_page |
100603 |
_version_ |
1766250392973213696 |