A synthesis of bentho‐pelagic coupling on the Antarctic shelf: Food banks, ecosystem inertia and global climate change
Abstract The Antarctic continental shelf is large, deep (500-1000 m), and characterized by extreme seasonality in sea-ice cover and primary production. Intense seasonality and short pelagic foodwebs on the Antarctic shelf may favor strong benthopelagic coupling, whereas unusual water depth combined...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1078.4501 2023-05-15T13:31:06+02:00 A synthesis of bentho‐pelagic coupling on the Antarctic shelf: Food banks, ecosystem inertia and global climate change Craig R Smith Sarah Mincks David J Demaster The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1078.4501 http://www.soest.hawaii.edu/oceanography/mincks/publications/Smith_etal_2006_BPCreview.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1078.4501 http://www.soest.hawaii.edu/oceanography/mincks/publications/Smith_etal_2006_BPCreview.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.soest.hawaii.edu/oceanography/mincks/publications/Smith_etal_2006_BPCreview.pdf text 2006 ftciteseerx 2020-05-03T00:18:28Z Abstract The Antarctic continental shelf is large, deep (500-1000 m), and characterized by extreme seasonality in sea-ice cover and primary production. Intense seasonality and short pelagic foodwebs on the Antarctic shelf may favor strong benthopelagic coupling, whereas unusual water depth combined with complex topography and circulation could cause such coupling to be weak. Here, we address six questions regarding the nature and strength of coupling between benthic and water-column processes on the continental shelf surrounding Antarctica. We find that water-column production is transmitted to the shelf floor in intense pulses of particulate organic matter, although these pulses are often difficult to correlate with local phytoplankton blooms or sea-ice conditions. On regional scales, benthic habitat variability resulting from substrate type, current regime, and iceberg scour often may obscure the imprint of water-column productivity on the seafloor. However, within a single habitat type, i.e. the muddy sediments that characterize much of the deep Antarctic shelf, macrobenthic biomass appears to be correlated with regional primary production and sea-ice duration. Over annual timescales, many benthic ecological processes were initially expected to vary in phase with the extraordinary boom/bust cycle of production in the water column. However, numerous processes, including sediment respiration, deposit feeding, larval development, and recruitment, often are poorly coupled to the summer bloom season. Several integrative, time-series studies on the Antarctic shelf suggest that this lack of phasing may result in part from the accumulation of a persistent sediment food bank that buffers the benthic ecosystem from the seasonal variability of the water column. As a consequence, a variety of benthic parameters (e.g., sediment respiration, inventories of labile organic matter, macrobenthic biomass) may act as ''low-pass'' filters, responding to longer-term (e.g., inter-annual) trends in water-column production. ... Text Antarc* Antarctic Antarctica Iceberg* Sea ice Unknown Antarctic The Antarctic |
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English |
description |
Abstract The Antarctic continental shelf is large, deep (500-1000 m), and characterized by extreme seasonality in sea-ice cover and primary production. Intense seasonality and short pelagic foodwebs on the Antarctic shelf may favor strong benthopelagic coupling, whereas unusual water depth combined with complex topography and circulation could cause such coupling to be weak. Here, we address six questions regarding the nature and strength of coupling between benthic and water-column processes on the continental shelf surrounding Antarctica. We find that water-column production is transmitted to the shelf floor in intense pulses of particulate organic matter, although these pulses are often difficult to correlate with local phytoplankton blooms or sea-ice conditions. On regional scales, benthic habitat variability resulting from substrate type, current regime, and iceberg scour often may obscure the imprint of water-column productivity on the seafloor. However, within a single habitat type, i.e. the muddy sediments that characterize much of the deep Antarctic shelf, macrobenthic biomass appears to be correlated with regional primary production and sea-ice duration. Over annual timescales, many benthic ecological processes were initially expected to vary in phase with the extraordinary boom/bust cycle of production in the water column. However, numerous processes, including sediment respiration, deposit feeding, larval development, and recruitment, often are poorly coupled to the summer bloom season. Several integrative, time-series studies on the Antarctic shelf suggest that this lack of phasing may result in part from the accumulation of a persistent sediment food bank that buffers the benthic ecosystem from the seasonal variability of the water column. As a consequence, a variety of benthic parameters (e.g., sediment respiration, inventories of labile organic matter, macrobenthic biomass) may act as ''low-pass'' filters, responding to longer-term (e.g., inter-annual) trends in water-column production. ... |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Craig R Smith Sarah Mincks David J Demaster |
spellingShingle |
Craig R Smith Sarah Mincks David J Demaster A synthesis of bentho‐pelagic coupling on the Antarctic shelf: Food banks, ecosystem inertia and global climate change |
author_facet |
Craig R Smith Sarah Mincks David J Demaster |
author_sort |
Craig R Smith |
title |
A synthesis of bentho‐pelagic coupling on the Antarctic shelf: Food banks, ecosystem inertia and global climate change |
title_short |
A synthesis of bentho‐pelagic coupling on the Antarctic shelf: Food banks, ecosystem inertia and global climate change |
title_full |
A synthesis of bentho‐pelagic coupling on the Antarctic shelf: Food banks, ecosystem inertia and global climate change |
title_fullStr |
A synthesis of bentho‐pelagic coupling on the Antarctic shelf: Food banks, ecosystem inertia and global climate change |
title_full_unstemmed |
A synthesis of bentho‐pelagic coupling on the Antarctic shelf: Food banks, ecosystem inertia and global climate change |
title_sort |
synthesis of bentho‐pelagic coupling on the antarctic shelf: food banks, ecosystem inertia and global climate change |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1078.4501 http://www.soest.hawaii.edu/oceanography/mincks/publications/Smith_etal_2006_BPCreview.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Iceberg* Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Iceberg* Sea ice |
op_source |
http://www.soest.hawaii.edu/oceanography/mincks/publications/Smith_etal_2006_BPCreview.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1078.4501 http://www.soest.hawaii.edu/oceanography/mincks/publications/Smith_etal_2006_BPCreview.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766016022778740736 |