High uptake of sympagic organic matter by benthos on an Arctic outflow shelf
On Arctic shelves, benthic food-webs are tightly linked to overlying primary production. In the seasonal ice zone, sympagic (ice-associated) primary production can be a major source of carbon for the benthos on productive inflow shelves. However, the role of sympagic organic matter is less well-unde...
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2024
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ftuhipublicatio:oai:pure.atira.dk:publications/328a39db-8156-484d-95b7-07e241a47467 2024-09-15T17:50:39+00:00 High uptake of sympagic organic matter by benthos on an Arctic outflow shelf Cautain, Ivan Last, Kim Bluhm, Bodil A. Renaud, Paul E. McKee, David Narayanaswamy, Bhavani 2024-08-08 https://pure.uhi.ac.uk/en/publications/328a39db-8156-484d-95b7-07e241a47467 https://doi.org/10.1371/journal.pone.0308562 eng eng https://pure.uhi.ac.uk/en/publications/328a39db-8156-484d-95b7-07e241a47467 info:eu-repo/semantics/openAccess Cautain , I , Last , K , Bluhm , B A , Renaud , P E , McKee , D & Narayanaswamy , B 2024 , ' High uptake of sympagic organic matter by benthos on an Arctic outflow shelf ' , PLoS ONE . https://doi.org/10.1371/journal.pone.0308562 article 2024 ftuhipublicatio https://doi.org/10.1371/journal.pone.0308562 2024-09-02T14:03:38Z On Arctic shelves, benthic food-webs are tightly linked to overlying primary production. In the seasonal ice zone, sympagic (ice-associated) primary production can be a major source of carbon for the benthos on productive inflow shelves. However, the role of sympagic organic matter is less well-understood in food webs of heavily ice-covered, less- productive outflow shelves, such as the northeast Greenland shelf. Highly branched isoprenoid biomarkers (HBIs) were used to track the relative distribution of sympagic and pelagic organic matter in the water column, sediments, and benthic fauna of the northeast Greenland shelf and fjords. Low pelagic HBI presence throughout the study area indicated a generally low production by pelagic diatoms (at the time of sampling). This was reflected in the benthos, as ~90% of their assimilated carbon was estimated to come from sympagic sources, indicating a benthic food-web highly reliant on sympagic production. This reliance was higher in coastal areas than on the open shelf, where the potentially higher pelagic productivity and shallower water on banks likely increased contributions of pelagic organic matter. As declining ice cover and reduced production of fast-sinking ice algae projected for Arctic shelves will likely result in weaker coupling between ice algae and the benthos, with possible consequences for future benthic-community structure and function. Article in Journal/Newspaper Arctic Greenland ice algae University of the Highlands and Islands: Research Database of UHI PLOS ONE 19 8 e0308562 |
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Open Polar |
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University of the Highlands and Islands: Research Database of UHI |
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ftuhipublicatio |
language |
English |
description |
On Arctic shelves, benthic food-webs are tightly linked to overlying primary production. In the seasonal ice zone, sympagic (ice-associated) primary production can be a major source of carbon for the benthos on productive inflow shelves. However, the role of sympagic organic matter is less well-understood in food webs of heavily ice-covered, less- productive outflow shelves, such as the northeast Greenland shelf. Highly branched isoprenoid biomarkers (HBIs) were used to track the relative distribution of sympagic and pelagic organic matter in the water column, sediments, and benthic fauna of the northeast Greenland shelf and fjords. Low pelagic HBI presence throughout the study area indicated a generally low production by pelagic diatoms (at the time of sampling). This was reflected in the benthos, as ~90% of their assimilated carbon was estimated to come from sympagic sources, indicating a benthic food-web highly reliant on sympagic production. This reliance was higher in coastal areas than on the open shelf, where the potentially higher pelagic productivity and shallower water on banks likely increased contributions of pelagic organic matter. As declining ice cover and reduced production of fast-sinking ice algae projected for Arctic shelves will likely result in weaker coupling between ice algae and the benthos, with possible consequences for future benthic-community structure and function. |
format |
Article in Journal/Newspaper |
author |
Cautain, Ivan Last, Kim Bluhm, Bodil A. Renaud, Paul E. McKee, David Narayanaswamy, Bhavani |
spellingShingle |
Cautain, Ivan Last, Kim Bluhm, Bodil A. Renaud, Paul E. McKee, David Narayanaswamy, Bhavani High uptake of sympagic organic matter by benthos on an Arctic outflow shelf |
author_facet |
Cautain, Ivan Last, Kim Bluhm, Bodil A. Renaud, Paul E. McKee, David Narayanaswamy, Bhavani |
author_sort |
Cautain, Ivan |
title |
High uptake of sympagic organic matter by benthos on an Arctic outflow shelf |
title_short |
High uptake of sympagic organic matter by benthos on an Arctic outflow shelf |
title_full |
High uptake of sympagic organic matter by benthos on an Arctic outflow shelf |
title_fullStr |
High uptake of sympagic organic matter by benthos on an Arctic outflow shelf |
title_full_unstemmed |
High uptake of sympagic organic matter by benthos on an Arctic outflow shelf |
title_sort |
high uptake of sympagic organic matter by benthos on an arctic outflow shelf |
publishDate |
2024 |
url |
https://pure.uhi.ac.uk/en/publications/328a39db-8156-484d-95b7-07e241a47467 https://doi.org/10.1371/journal.pone.0308562 |
genre |
Arctic Greenland ice algae |
genre_facet |
Arctic Greenland ice algae |
op_source |
Cautain , I , Last , K , Bluhm , B A , Renaud , P E , McKee , D & Narayanaswamy , B 2024 , ' High uptake of sympagic organic matter by benthos on an Arctic outflow shelf ' , PLoS ONE . https://doi.org/10.1371/journal.pone.0308562 |
op_relation |
https://pure.uhi.ac.uk/en/publications/328a39db-8156-484d-95b7-07e241a47467 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0308562 |
container_title |
PLOS ONE |
container_volume |
19 |
container_issue |
8 |
container_start_page |
e0308562 |
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1810292459014455296 |