Climate change and control of the southeastern Bering Sea pelagic ecosystem
We propose a new hypothesis, the Oscillating Control Hypothesis (OCH), which predicts that pelagic ecosystem function in the southeastern Bering Sea will alternate between primarily bottom-up control in cold regimes and primarily top-down control in warm regimes. The timing of spring primary product...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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eScholarship, University of California
2002
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Online Access: | https://escholarship.org/uc/item/1kx2g2dt https://escholarship.org/content/qt1kx2g2dt/qt1kx2g2dt.pdf https://doi.org/10.1016/s0967-0645(02)00321-1 |
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ftcdlib:oai:escholarship.org:ark:/13030/qt1kx2g2dt 2024-09-09T19:33:47+00:00 Climate change and control of the southeastern Bering Sea pelagic ecosystem Hunt, George L Stabeno, Phyllis Walters, Gary Sinclair, Elizabeth Brodeur, Richard D Napp, Jeffery M Bond, Nicholas A 5821 - 5853 2002-12-01 application/pdf https://escholarship.org/uc/item/1kx2g2dt https://escholarship.org/content/qt1kx2g2dt/qt1kx2g2dt.pdf https://doi.org/10.1016/s0967-0645(02)00321-1 unknown eScholarship, University of California qt1kx2g2dt https://escholarship.org/uc/item/1kx2g2dt https://escholarship.org/content/qt1kx2g2dt/qt1kx2g2dt.pdf doi:10.1016/s0967-0645(02)00321-1 CC-BY Deep Sea Research Part II Topical Studies in Oceanography, vol 49, iss 26 Climate Action Geochemistry Oceanography Ecology article 2002 ftcdlib https://doi.org/10.1016/s0967-0645(02)00321-1 2024-06-28T06:28:20Z We propose a new hypothesis, the Oscillating Control Hypothesis (OCH), which predicts that pelagic ecosystem function in the southeastern Bering Sea will alternate between primarily bottom-up control in cold regimes and primarily top-down control in warm regimes. The timing of spring primary production is determined predominately by the timing of ice retreat. Late ice retreat (late March or later) leads to an early, ice-associated bloom in cold water (e.g., 1995, 1997, 1999), whereas no ice, or early ice retreat before mid-March, leads to an open-water bloom in May or June in warm water (e.g., 1996, 1998, 2000). Zooplankton populations are not closely coupled to the spring bloom, but are sensitive to water temperature. In years when the spring bloom occurs in cold water, low temperatures limit the production of zooplankton, the survival of larval/juvenile fish, and their recruitment into the populations of species of large piscivorous fish, such as walleye pollock (Theragra chalcogramma), Pacific cod (Gadus macrocephalus) and arrowtooth flounder (Atheresthes stomias). When continued over decadal scales, this will lead to bottom-up limitation and a decreased biomass of piscivorous fish. Alternatively, in periods when the bloom occurs in warm water, zooplankton populations should grow rapidly, providing plentiful prey for larval and juvenile fish. Abundant zooplankton will support strong recruitment of fish and will lead to abundant predatory fish that control forage fish, including, in the case of pollock, their own juveniles. Piscivorous marine birds and pinnipeds may achieve higher production of young and survival in cold regimes, when there is less competition from large piscivorous fish for coldwater forage fish such as capelin (Mallotus villosus). Piscivorous seabirds and pinnipeds also may be expected to have high productivity in periods of transition from cold regimes to warm regimes, when young of large predatory species of fish are numerous enough to provide forage. The OCH predicts that the ability of ... Article in Journal/Newspaper Bering Sea Theragra chalcogramma University of California: eScholarship Bering Sea Pacific Deep Sea Research Part II: Topical Studies in Oceanography 49 26 5821 5853 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action Geochemistry Oceanography Ecology |
spellingShingle |
Climate Action Geochemistry Oceanography Ecology Hunt, George L Stabeno, Phyllis Walters, Gary Sinclair, Elizabeth Brodeur, Richard D Napp, Jeffery M Bond, Nicholas A Climate change and control of the southeastern Bering Sea pelagic ecosystem |
topic_facet |
Climate Action Geochemistry Oceanography Ecology |
description |
We propose a new hypothesis, the Oscillating Control Hypothesis (OCH), which predicts that pelagic ecosystem function in the southeastern Bering Sea will alternate between primarily bottom-up control in cold regimes and primarily top-down control in warm regimes. The timing of spring primary production is determined predominately by the timing of ice retreat. Late ice retreat (late March or later) leads to an early, ice-associated bloom in cold water (e.g., 1995, 1997, 1999), whereas no ice, or early ice retreat before mid-March, leads to an open-water bloom in May or June in warm water (e.g., 1996, 1998, 2000). Zooplankton populations are not closely coupled to the spring bloom, but are sensitive to water temperature. In years when the spring bloom occurs in cold water, low temperatures limit the production of zooplankton, the survival of larval/juvenile fish, and their recruitment into the populations of species of large piscivorous fish, such as walleye pollock (Theragra chalcogramma), Pacific cod (Gadus macrocephalus) and arrowtooth flounder (Atheresthes stomias). When continued over decadal scales, this will lead to bottom-up limitation and a decreased biomass of piscivorous fish. Alternatively, in periods when the bloom occurs in warm water, zooplankton populations should grow rapidly, providing plentiful prey for larval and juvenile fish. Abundant zooplankton will support strong recruitment of fish and will lead to abundant predatory fish that control forage fish, including, in the case of pollock, their own juveniles. Piscivorous marine birds and pinnipeds may achieve higher production of young and survival in cold regimes, when there is less competition from large piscivorous fish for coldwater forage fish such as capelin (Mallotus villosus). Piscivorous seabirds and pinnipeds also may be expected to have high productivity in periods of transition from cold regimes to warm regimes, when young of large predatory species of fish are numerous enough to provide forage. The OCH predicts that the ability of ... |
format |
Article in Journal/Newspaper |
author |
Hunt, George L Stabeno, Phyllis Walters, Gary Sinclair, Elizabeth Brodeur, Richard D Napp, Jeffery M Bond, Nicholas A |
author_facet |
Hunt, George L Stabeno, Phyllis Walters, Gary Sinclair, Elizabeth Brodeur, Richard D Napp, Jeffery M Bond, Nicholas A |
author_sort |
Hunt, George L |
title |
Climate change and control of the southeastern Bering Sea pelagic ecosystem |
title_short |
Climate change and control of the southeastern Bering Sea pelagic ecosystem |
title_full |
Climate change and control of the southeastern Bering Sea pelagic ecosystem |
title_fullStr |
Climate change and control of the southeastern Bering Sea pelagic ecosystem |
title_full_unstemmed |
Climate change and control of the southeastern Bering Sea pelagic ecosystem |
title_sort |
climate change and control of the southeastern bering sea pelagic ecosystem |
publisher |
eScholarship, University of California |
publishDate |
2002 |
url |
https://escholarship.org/uc/item/1kx2g2dt https://escholarship.org/content/qt1kx2g2dt/qt1kx2g2dt.pdf https://doi.org/10.1016/s0967-0645(02)00321-1 |
op_coverage |
5821 - 5853 |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea Theragra chalcogramma |
genre_facet |
Bering Sea Theragra chalcogramma |
op_source |
Deep Sea Research Part II Topical Studies in Oceanography, vol 49, iss 26 |
op_relation |
qt1kx2g2dt https://escholarship.org/uc/item/1kx2g2dt https://escholarship.org/content/qt1kx2g2dt/qt1kx2g2dt.pdf doi:10.1016/s0967-0645(02)00321-1 |
op_rights |
CC-BY |
op_doi |
https://doi.org/10.1016/s0967-0645(02)00321-1 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
49 |
container_issue |
26 |
container_start_page |
5821 |
op_container_end_page |
5853 |
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1809903324077490176 |