Spatial and Temporal Variability of SeaWiFS Chlorophyll a Distributions West of the Antarctic Peninsula: Implications for Krill Production
SeaWiFS chlorophyll a distributions between 1997 and 2004 were investigated in relation to sea-ice dynamics for waters west of the Antarctic Peninsula (55–75°S, 50–80°W) in order to better understand the reproductive patterns and recruitment success of the Antarctic krill, Euphausia superba. Climato...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Digital Commons @ University of South Florida
2008
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Online Access: | https://digitalcommons.usf.edu/msc_facpub/852 https://doi.org/10.1016/j.dsr2.2007.11.011 |
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-1849 2023-07-30T03:57:18+02:00 Spatial and Temporal Variability of SeaWiFS Chlorophyll a Distributions West of the Antarctic Peninsula: Implications for Krill Production Marrari, Marina Daly, Kendra L. Hu, Chuanmin 2008-02-01T08:00:00Z https://digitalcommons.usf.edu/msc_facpub/852 https://doi.org/10.1016/j.dsr2.2007.11.011 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/852 doi:10.1016/j.dsr2.2007.11.011 https://doi.org/10.1016/j.dsr2.2007.11.011 Marine Science Faculty Publications Chlorophyll a Climatology SeaWiFS Antarctic krill Euphausia superba Sea ice Southern Ocean Antarctic Peninsula Bellingshausen Sea Life Sciences article 2008 ftusouthflorida https://doi.org/10.1016/j.dsr2.2007.11.011 2023-07-13T21:01:59Z SeaWiFS chlorophyll a distributions between 1997 and 2004 were investigated in relation to sea-ice dynamics for waters west of the Antarctic Peninsula (55–75°S, 50–80°W) in order to better understand the reproductive patterns and recruitment success of the Antarctic krill, Euphausia superba. Climatology patterns showed that the Bellingshausen Sea and Marguerite Bay region usually had higher chlorophyll a concentrations, which persisted throughout austral spring and summer, compared with more northern regions along the Antarctic Peninsula and the western Scotia Sea. These predictable and long-lasting phytoplankton accumulations could provide krill with the food levels required for successful reproduction and larval survival. Unusually high krill reproduction in 2000/2001 was coincident with above-average chlorophyll a concentrations throughout most of the study area and resulted in the largest juvenile recruitment (in 2001/2002) since 1981. High larval densities (up to 132 ind m−3) at the shelf break along the Antarctic Peninsula may have resulted, in part, from krill spawning in the Bellingshausen Sea. In general, ice-edge blooms were only a significant feature in the southern sectors of our study area, particularly in the Bellingshausen Sea and, thus, may not support krill reproduction in the northern Peninsula region as previously believed. Instead, phytoplankton blooms during spring in the northern region appeared to be governed by shelf-break processes, such as upwelling of iron-rich deep water. Interannual differences in sea ice also probably contributed to the variability in larval krill abundances observed in Marguerite Bay. Sea ice melted early in 2000/2001, allowing elevated phytoplankton blooms to develop. In contrast, sea ice persisted throughout spring and summer 2001/2002 limiting phytoplankton accumulation, particularly in southern Marguerite Bay. Thus, the early and extended availability of elevated chlorophyll a concentrations during spring and summer 2000/2001, particularly in the vicinity of ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula Bellingshausen Sea Euphausia superba Scotia Sea Sea ice Southern Ocean University of South Florida St. Petersburg: Digital USFSP Antarctic Antarctic Peninsula Austral Bellingshausen Sea Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) Marguerite Bay ENVELOPE(-68.000,-68.000,-68.500,-68.500) Scotia Sea Southern Ocean The Antarctic Deep Sea Research Part II: Topical Studies in Oceanography 55 3-4 377 392 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Chlorophyll a Climatology SeaWiFS Antarctic krill Euphausia superba Sea ice Southern Ocean Antarctic Peninsula Bellingshausen Sea Life Sciences |
spellingShingle |
Chlorophyll a Climatology SeaWiFS Antarctic krill Euphausia superba Sea ice Southern Ocean Antarctic Peninsula Bellingshausen Sea Life Sciences Marrari, Marina Daly, Kendra L. Hu, Chuanmin Spatial and Temporal Variability of SeaWiFS Chlorophyll a Distributions West of the Antarctic Peninsula: Implications for Krill Production |
topic_facet |
Chlorophyll a Climatology SeaWiFS Antarctic krill Euphausia superba Sea ice Southern Ocean Antarctic Peninsula Bellingshausen Sea Life Sciences |
description |
SeaWiFS chlorophyll a distributions between 1997 and 2004 were investigated in relation to sea-ice dynamics for waters west of the Antarctic Peninsula (55–75°S, 50–80°W) in order to better understand the reproductive patterns and recruitment success of the Antarctic krill, Euphausia superba. Climatology patterns showed that the Bellingshausen Sea and Marguerite Bay region usually had higher chlorophyll a concentrations, which persisted throughout austral spring and summer, compared with more northern regions along the Antarctic Peninsula and the western Scotia Sea. These predictable and long-lasting phytoplankton accumulations could provide krill with the food levels required for successful reproduction and larval survival. Unusually high krill reproduction in 2000/2001 was coincident with above-average chlorophyll a concentrations throughout most of the study area and resulted in the largest juvenile recruitment (in 2001/2002) since 1981. High larval densities (up to 132 ind m−3) at the shelf break along the Antarctic Peninsula may have resulted, in part, from krill spawning in the Bellingshausen Sea. In general, ice-edge blooms were only a significant feature in the southern sectors of our study area, particularly in the Bellingshausen Sea and, thus, may not support krill reproduction in the northern Peninsula region as previously believed. Instead, phytoplankton blooms during spring in the northern region appeared to be governed by shelf-break processes, such as upwelling of iron-rich deep water. Interannual differences in sea ice also probably contributed to the variability in larval krill abundances observed in Marguerite Bay. Sea ice melted early in 2000/2001, allowing elevated phytoplankton blooms to develop. In contrast, sea ice persisted throughout spring and summer 2001/2002 limiting phytoplankton accumulation, particularly in southern Marguerite Bay. Thus, the early and extended availability of elevated chlorophyll a concentrations during spring and summer 2000/2001, particularly in the vicinity of ... |
format |
Article in Journal/Newspaper |
author |
Marrari, Marina Daly, Kendra L. Hu, Chuanmin |
author_facet |
Marrari, Marina Daly, Kendra L. Hu, Chuanmin |
author_sort |
Marrari, Marina |
title |
Spatial and Temporal Variability of SeaWiFS Chlorophyll a Distributions West of the Antarctic Peninsula: Implications for Krill Production |
title_short |
Spatial and Temporal Variability of SeaWiFS Chlorophyll a Distributions West of the Antarctic Peninsula: Implications for Krill Production |
title_full |
Spatial and Temporal Variability of SeaWiFS Chlorophyll a Distributions West of the Antarctic Peninsula: Implications for Krill Production |
title_fullStr |
Spatial and Temporal Variability of SeaWiFS Chlorophyll a Distributions West of the Antarctic Peninsula: Implications for Krill Production |
title_full_unstemmed |
Spatial and Temporal Variability of SeaWiFS Chlorophyll a Distributions West of the Antarctic Peninsula: Implications for Krill Production |
title_sort |
spatial and temporal variability of seawifs chlorophyll a distributions west of the antarctic peninsula: implications for krill production |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2008 |
url |
https://digitalcommons.usf.edu/msc_facpub/852 https://doi.org/10.1016/j.dsr2.2007.11.011 |
long_lat |
ENVELOPE(141.378,141.378,-66.787,-66.787) ENVELOPE(-68.000,-68.000,-68.500,-68.500) |
geographic |
Antarctic Antarctic Peninsula Austral Bellingshausen Sea Marguerite Marguerite Bay Scotia Sea Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Austral Bellingshausen Sea Marguerite Marguerite Bay Scotia Sea Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Bellingshausen Sea Euphausia superba Scotia Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Bellingshausen Sea Euphausia superba Scotia Sea Sea ice Southern Ocean |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/852 doi:10.1016/j.dsr2.2007.11.011 https://doi.org/10.1016/j.dsr2.2007.11.011 |
op_doi |
https://doi.org/10.1016/j.dsr2.2007.11.011 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
55 |
container_issue |
3-4 |
container_start_page |
377 |
op_container_end_page |
392 |
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1772816748950585344 |