Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea
Assessment of Arctic deep-sea ecosystem functioning is currently an urgent task considering that ongoing sea-ice reduction opens opportunities for resource exploitation of yet understudied deep-sea regions. We used Biological Trait Analysis to evaluate ecosystem functioning and test if common paradi...
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ftdoajarticles:oai:doaj.org/article:eef8a865da27493583885bddfb66cec5 2023-05-15T14:53:05+02:00 Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea Irina Zhulay Bodil A. Bluhm Paul E. Renaud Renate Degen Katrin Iken 2021-05-01T00:00:00Z https://doi.org/10.3389/fmars.2021.609956 https://doaj.org/article/eef8a865da27493583885bddfb66cec5 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2021.609956/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.609956 https://doaj.org/article/eef8a865da27493583885bddfb66cec5 Frontiers in Marine Science, Vol 8 (2021) Arctic deep sea benthic epifauna biological trait analysis functional composition ROV Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2021 ftdoajarticles https://doi.org/10.3389/fmars.2021.609956 2022-12-31T13:09:32Z Assessment of Arctic deep-sea ecosystem functioning is currently an urgent task considering that ongoing sea-ice reduction opens opportunities for resource exploitation of yet understudied deep-sea regions. We used Biological Trait Analysis to evaluate ecosystem functioning and test if common paradigms for deep-sea fauna apply to benthic epifauna of the deep-sea Arctic Chukchi Borderland (CBL). We also investigated the influence of environmental factors on the functional structure of the epifauna. The analysis was performed for 106 taxa collected with a beam trawl and a Remotely Operated Vehicle from 486 to 2610 m depth. The most common trait modalities were small-medium size, mobile, benthic direct and lecithotrophic larval development, and predatory feeding, which mostly supports the current view of epifauna in the global deep sea. Functional composition of epifauna differed between two depth strata (486–1059 m and 1882–2610 m), with depth and sediment carbon content explaining most of the functional variability. Proportional abundances of the modalities free-living, swimming, suspension feeders, opportunists/scavengers, internal fertilization and globulose were higher at deep stations. Functional redundancy (FR) was also higher there compared to the mid-depth stations, suggesting adaptation of fauna to the more homogeneous deep environment by fewer and shared traits. Mid-depth stations represented higher functional variability in terms of both trait modality composition and functional diversity, indicating more variable resource use in the more heterogeneous habitat. Food input correlated positively with the proportional abundance of the modalities tube-dwelling, sessile and deposit feeding. Areas with drop stones were associated with higher proportional abundance of the modalities attached, upright, and predators. Comparatively low FR may render the heterogeneous mid-depth area of the CBL vulnerable to disturbance through the risk of loss of functions. Across the study area, high occurrence of taxa with low ... Article in Journal/Newspaper Arctic Chukchi Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Chukchi Borderland ENVELOPE(-165.000,-165.000,77.000,77.000) Frontiers in Marine Science 8 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic deep sea benthic epifauna biological trait analysis functional composition ROV Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Arctic deep sea benthic epifauna biological trait analysis functional composition ROV Science Q General. Including nature conservation geographical distribution QH1-199.5 Irina Zhulay Bodil A. Bluhm Paul E. Renaud Renate Degen Katrin Iken Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea |
topic_facet |
Arctic deep sea benthic epifauna biological trait analysis functional composition ROV Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Assessment of Arctic deep-sea ecosystem functioning is currently an urgent task considering that ongoing sea-ice reduction opens opportunities for resource exploitation of yet understudied deep-sea regions. We used Biological Trait Analysis to evaluate ecosystem functioning and test if common paradigms for deep-sea fauna apply to benthic epifauna of the deep-sea Arctic Chukchi Borderland (CBL). We also investigated the influence of environmental factors on the functional structure of the epifauna. The analysis was performed for 106 taxa collected with a beam trawl and a Remotely Operated Vehicle from 486 to 2610 m depth. The most common trait modalities were small-medium size, mobile, benthic direct and lecithotrophic larval development, and predatory feeding, which mostly supports the current view of epifauna in the global deep sea. Functional composition of epifauna differed between two depth strata (486–1059 m and 1882–2610 m), with depth and sediment carbon content explaining most of the functional variability. Proportional abundances of the modalities free-living, swimming, suspension feeders, opportunists/scavengers, internal fertilization and globulose were higher at deep stations. Functional redundancy (FR) was also higher there compared to the mid-depth stations, suggesting adaptation of fauna to the more homogeneous deep environment by fewer and shared traits. Mid-depth stations represented higher functional variability in terms of both trait modality composition and functional diversity, indicating more variable resource use in the more heterogeneous habitat. Food input correlated positively with the proportional abundance of the modalities tube-dwelling, sessile and deposit feeding. Areas with drop stones were associated with higher proportional abundance of the modalities attached, upright, and predators. Comparatively low FR may render the heterogeneous mid-depth area of the CBL vulnerable to disturbance through the risk of loss of functions. Across the study area, high occurrence of taxa with low ... |
format |
Article in Journal/Newspaper |
author |
Irina Zhulay Bodil A. Bluhm Paul E. Renaud Renate Degen Katrin Iken |
author_facet |
Irina Zhulay Bodil A. Bluhm Paul E. Renaud Renate Degen Katrin Iken |
author_sort |
Irina Zhulay |
title |
Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea |
title_short |
Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea |
title_full |
Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea |
title_fullStr |
Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea |
title_full_unstemmed |
Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea |
title_sort |
functional pattern of benthic epifauna in the chukchi borderland, arctic deep sea |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2021.609956 https://doaj.org/article/eef8a865da27493583885bddfb66cec5 |
long_lat |
ENVELOPE(-165.000,-165.000,77.000,77.000) |
geographic |
Arctic Chukchi Borderland |
geographic_facet |
Arctic Chukchi Borderland |
genre |
Arctic Chukchi Sea ice |
genre_facet |
Arctic Chukchi Sea ice |
op_source |
Frontiers in Marine Science, Vol 8 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2021.609956/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.609956 https://doaj.org/article/eef8a865da27493583885bddfb66cec5 |
op_doi |
https://doi.org/10.3389/fmars.2021.609956 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
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1766324499551092736 |