Trends in benthic macrofaunal populations, seasonal sea ice persistence, and bottom water temperatures in the bering strait region
Recent declines in sea ice extent and warming seawater temperatures in the Arctic have the potential to impact regional and pan-Arctic marine ecosystems. To investigate marine biological response to these key drivers and other environmental factors, we undertook a robust trend analysis of benthic ma...
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ftclarkuniv:oai:commons.clarku.edu:faculty_geography-1198 2023-09-05T13:17:19+02:00 Trends in benthic macrofaunal populations, seasonal sea ice persistence, and bottom water temperatures in the bering strait region Grebmeier, Jacqueline M. Frey, Karen E. Cooper, Lee W. Kędra, Monika 2018-01-01T08:00:00Z application/pdf https://commons.clarku.edu/faculty_geography/199 https://doi.org/10.5670/oceanog.2018.224 https://commons.clarku.edu/context/faculty_geography/article/1198/viewcontent/GeogFacWorks_Frey_TrendsBenthic_2018.pdf unknown Clark Digital Commons https://commons.clarku.edu/faculty_geography/199 doi:10.5670/oceanog.2018.224 https://commons.clarku.edu/context/faculty_geography/article/1198/viewcontent/GeogFacWorks_Frey_TrendsBenthic_2018.pdf http://creativecommons.org/licenses/by/4.0/ Geography benthic macrofaunal populations sea ice marine ecosystems Bering Strait Chukchi Sea Climate Oceanography text 2018 ftclarkuniv https://doi.org/10.5670/oceanog.2018.224 2023-08-14T06:16:39Z Recent declines in sea ice extent and warming seawater temperatures in the Arctic have the potential to impact regional and pan-Arctic marine ecosystems. To investigate marine biological response to these key drivers and other environmental factors, we undertook a robust trend analysis of benthic macrofaunal populations and environmental drivers in the Bering Strait region. Our focus was on the waters of the northern Bering and southern Chukchi Seas, which are shallow (m) and seasonally productive, with strong pelagic-benthic coupling between water-column-derived organic matter and the seafloor. Studies indicate that both in situ production and advection of upstream phytodetritus support persistent biologically productive regions, termed hotspots, in the greater Bering Strait region. The benthic marine ecosystem is dominated by macroinvertebrates (e.g., clams, polychaetes, and amphipods) that in turn serve as food resources for diving mammals and seabirds, thus allowing for changes to cascade strongly through the food web from prey to predator. During our study, the persistence of seasonal sea ice significantly declined; trend analyses indicate both earlier sea ice breakup and later fall freeze-up in recent years. When combined with warming seawater temperatures in the region, these changes have ramifications for water column processes that influence benthic faunal biomass and composition, which can transfer to upper trophic level predators. We studied these changes by evaluating time series sites in three benthic biomass hotspots starting in 1998 (Southeast Chukchi Sea region), 1999 (Chirikov Basin region), and 2000 (St. Lawrence Island Polynya region). We present these data within a broader evaluation of benthic biomass results from prior cruises dating as early as the 1970s. The current study focuses on the period 1998–2015 at sites occupied annually each July using CCGS Sir Wilfrid Laurier. Since 2010, these time series sites have become part of the international Distributed Biological Observatory (DBO), a ... Text Arctic Bering Strait Chukchi Chukchi Sea Sea ice St Lawrence Island Clark University: Clark Digital Commons Arctic Chukchi Sea Bering Strait Lawrence Island ENVELOPE(-103.718,-103.718,56.967,56.967) Oceanography 31 2 |
institution |
Open Polar |
collection |
Clark University: Clark Digital Commons |
op_collection_id |
ftclarkuniv |
language |
unknown |
topic |
benthic macrofaunal populations sea ice marine ecosystems Bering Strait Chukchi Sea Climate Oceanography |
spellingShingle |
benthic macrofaunal populations sea ice marine ecosystems Bering Strait Chukchi Sea Climate Oceanography Grebmeier, Jacqueline M. Frey, Karen E. Cooper, Lee W. Kędra, Monika Trends in benthic macrofaunal populations, seasonal sea ice persistence, and bottom water temperatures in the bering strait region |
topic_facet |
benthic macrofaunal populations sea ice marine ecosystems Bering Strait Chukchi Sea Climate Oceanography |
description |
Recent declines in sea ice extent and warming seawater temperatures in the Arctic have the potential to impact regional and pan-Arctic marine ecosystems. To investigate marine biological response to these key drivers and other environmental factors, we undertook a robust trend analysis of benthic macrofaunal populations and environmental drivers in the Bering Strait region. Our focus was on the waters of the northern Bering and southern Chukchi Seas, which are shallow (m) and seasonally productive, with strong pelagic-benthic coupling between water-column-derived organic matter and the seafloor. Studies indicate that both in situ production and advection of upstream phytodetritus support persistent biologically productive regions, termed hotspots, in the greater Bering Strait region. The benthic marine ecosystem is dominated by macroinvertebrates (e.g., clams, polychaetes, and amphipods) that in turn serve as food resources for diving mammals and seabirds, thus allowing for changes to cascade strongly through the food web from prey to predator. During our study, the persistence of seasonal sea ice significantly declined; trend analyses indicate both earlier sea ice breakup and later fall freeze-up in recent years. When combined with warming seawater temperatures in the region, these changes have ramifications for water column processes that influence benthic faunal biomass and composition, which can transfer to upper trophic level predators. We studied these changes by evaluating time series sites in three benthic biomass hotspots starting in 1998 (Southeast Chukchi Sea region), 1999 (Chirikov Basin region), and 2000 (St. Lawrence Island Polynya region). We present these data within a broader evaluation of benthic biomass results from prior cruises dating as early as the 1970s. The current study focuses on the period 1998–2015 at sites occupied annually each July using CCGS Sir Wilfrid Laurier. Since 2010, these time series sites have become part of the international Distributed Biological Observatory (DBO), a ... |
format |
Text |
author |
Grebmeier, Jacqueline M. Frey, Karen E. Cooper, Lee W. Kędra, Monika |
author_facet |
Grebmeier, Jacqueline M. Frey, Karen E. Cooper, Lee W. Kędra, Monika |
author_sort |
Grebmeier, Jacqueline M. |
title |
Trends in benthic macrofaunal populations, seasonal sea ice persistence, and bottom water temperatures in the bering strait region |
title_short |
Trends in benthic macrofaunal populations, seasonal sea ice persistence, and bottom water temperatures in the bering strait region |
title_full |
Trends in benthic macrofaunal populations, seasonal sea ice persistence, and bottom water temperatures in the bering strait region |
title_fullStr |
Trends in benthic macrofaunal populations, seasonal sea ice persistence, and bottom water temperatures in the bering strait region |
title_full_unstemmed |
Trends in benthic macrofaunal populations, seasonal sea ice persistence, and bottom water temperatures in the bering strait region |
title_sort |
trends in benthic macrofaunal populations, seasonal sea ice persistence, and bottom water temperatures in the bering strait region |
publisher |
Clark Digital Commons |
publishDate |
2018 |
url |
https://commons.clarku.edu/faculty_geography/199 https://doi.org/10.5670/oceanog.2018.224 https://commons.clarku.edu/context/faculty_geography/article/1198/viewcontent/GeogFacWorks_Frey_TrendsBenthic_2018.pdf |
long_lat |
ENVELOPE(-103.718,-103.718,56.967,56.967) |
geographic |
Arctic Chukchi Sea Bering Strait Lawrence Island |
geographic_facet |
Arctic Chukchi Sea Bering Strait Lawrence Island |
genre |
Arctic Bering Strait Chukchi Chukchi Sea Sea ice St Lawrence Island |
genre_facet |
Arctic Bering Strait Chukchi Chukchi Sea Sea ice St Lawrence Island |
op_source |
Geography |
op_relation |
https://commons.clarku.edu/faculty_geography/199 doi:10.5670/oceanog.2018.224 https://commons.clarku.edu/context/faculty_geography/article/1198/viewcontent/GeogFacWorks_Frey_TrendsBenthic_2018.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.5670/oceanog.2018.224 |
container_title |
Oceanography |
container_volume |
31 |
container_issue |
2 |
_version_ |
1776198536627486720 |