Deep-Sea Research I 46 (1999) 1391}1415 Mesozooplankton in the Arctic Ocean in summer
The biomass, species and chemical composition of the mesozooplankton and their impact on lower food levels were estimated along a transect across the Arctic Ocean. Mesozooplankton biomass in the upper 200 m of the water column was signi"cantly higher (19}42 mg DW m~3) than has previously been r...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.582.3784 2023-05-15T13:22:45+02:00 Deep-Sea Research I 46 (1999) 1391}1415 Mesozooplankton in the Arctic Ocean in summer Delphine Thibault Erica J. H. Head Patricia A. Wheeler The Pennsylvania State University CiteSeerX Archives 1997 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.582.3784 http://www.com.univ-mrs.fr/~botha/thibault et al, AOS94.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.582.3784 http://www.com.univ-mrs.fr/~botha/thibault et al, AOS94.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.com.univ-mrs.fr/~botha/thibault et al, AOS94.pdf text 1997 ftciteseerx 2016-08-28T00:02:51Z The biomass, species and chemical composition of the mesozooplankton and their impact on lower food levels were estimated along a transect across the Arctic Ocean. Mesozooplankton biomass in the upper 200 m of the water column was signi"cantly higher (19}42 mg DW m~3) than has previously been reported for the Arctic Ocean, and it reached a maximum at ca. 873N in the Amundsen Basin. The lowest values were recorded in the Chukchi Sea and Nansen Basin, where ice cover was lower (50}80%) than in the central Arctic Ocean. In the deeper strata (200}500 m) of the Canadian and Eurasian Basins, the biomass was always much lower (4.35}16.44 mg DW m~3). The C/N (g/g) ratio for the mesozooplankton population was high (6.5}8.5) but within the documented range. These high values (when compared to 4.5 at lower latitudes) may be explained by the high lipid content. Mesozooplankton accounted for approx-imately 40 % of the total particulate organic carbon in the upper 100 m of the water column. Mesozooplankton species composition was homogeneous along the transect, consisting mainly of copepods (70}90 % of the total number). It was dominated by four large copepod species (Calanus hyperboreus, C. glacialis, C.,nmarchicus and Metridia longa), which together ac-counted for more than 80 % of the total biomass. According to measurements of gut pigment and gut turnover rates, the mesozooplankton on average ingested between 6 and 30 % of their body carbon per day as phytoplankton. Microzooplankton may have provided an additional source of energy for the mesozooplankton community. These data emphasize the importance of mesozooplankton in the arctic food web and reinforce the idea that the Arctic Ocean should Text amundsen basin Arctic Arctic Ocean Calanus hyperboreus Chukchi Chukchi Sea Nansen Basin Phytoplankton Copepods Unknown Amundsen Basin ENVELOPE(74.000,74.000,87.000,87.000) Arctic Arctic Ocean Chukchi Sea |
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Open Polar |
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ftciteseerx |
language |
English |
description |
The biomass, species and chemical composition of the mesozooplankton and their impact on lower food levels were estimated along a transect across the Arctic Ocean. Mesozooplankton biomass in the upper 200 m of the water column was signi"cantly higher (19}42 mg DW m~3) than has previously been reported for the Arctic Ocean, and it reached a maximum at ca. 873N in the Amundsen Basin. The lowest values were recorded in the Chukchi Sea and Nansen Basin, where ice cover was lower (50}80%) than in the central Arctic Ocean. In the deeper strata (200}500 m) of the Canadian and Eurasian Basins, the biomass was always much lower (4.35}16.44 mg DW m~3). The C/N (g/g) ratio for the mesozooplankton population was high (6.5}8.5) but within the documented range. These high values (when compared to 4.5 at lower latitudes) may be explained by the high lipid content. Mesozooplankton accounted for approx-imately 40 % of the total particulate organic carbon in the upper 100 m of the water column. Mesozooplankton species composition was homogeneous along the transect, consisting mainly of copepods (70}90 % of the total number). It was dominated by four large copepod species (Calanus hyperboreus, C. glacialis, C.,nmarchicus and Metridia longa), which together ac-counted for more than 80 % of the total biomass. According to measurements of gut pigment and gut turnover rates, the mesozooplankton on average ingested between 6 and 30 % of their body carbon per day as phytoplankton. Microzooplankton may have provided an additional source of energy for the mesozooplankton community. These data emphasize the importance of mesozooplankton in the arctic food web and reinforce the idea that the Arctic Ocean should |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Delphine Thibault Erica J. H. Head Patricia A. Wheeler |
spellingShingle |
Delphine Thibault Erica J. H. Head Patricia A. Wheeler Deep-Sea Research I 46 (1999) 1391}1415 Mesozooplankton in the Arctic Ocean in summer |
author_facet |
Delphine Thibault Erica J. H. Head Patricia A. Wheeler |
author_sort |
Delphine Thibault |
title |
Deep-Sea Research I 46 (1999) 1391}1415 Mesozooplankton in the Arctic Ocean in summer |
title_short |
Deep-Sea Research I 46 (1999) 1391}1415 Mesozooplankton in the Arctic Ocean in summer |
title_full |
Deep-Sea Research I 46 (1999) 1391}1415 Mesozooplankton in the Arctic Ocean in summer |
title_fullStr |
Deep-Sea Research I 46 (1999) 1391}1415 Mesozooplankton in the Arctic Ocean in summer |
title_full_unstemmed |
Deep-Sea Research I 46 (1999) 1391}1415 Mesozooplankton in the Arctic Ocean in summer |
title_sort |
deep-sea research i 46 (1999) 1391}1415 mesozooplankton in the arctic ocean in summer |
publishDate |
1997 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.582.3784 http://www.com.univ-mrs.fr/~botha/thibault et al, AOS94.pdf |
long_lat |
ENVELOPE(74.000,74.000,87.000,87.000) |
geographic |
Amundsen Basin Arctic Arctic Ocean Chukchi Sea |
geographic_facet |
Amundsen Basin Arctic Arctic Ocean Chukchi Sea |
genre |
amundsen basin Arctic Arctic Ocean Calanus hyperboreus Chukchi Chukchi Sea Nansen Basin Phytoplankton Copepods |
genre_facet |
amundsen basin Arctic Arctic Ocean Calanus hyperboreus Chukchi Chukchi Sea Nansen Basin Phytoplankton Copepods |
op_source |
http://www.com.univ-mrs.fr/~botha/thibault et al, AOS94.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.582.3784 http://www.com.univ-mrs.fr/~botha/thibault et al, AOS94.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766366731830296576 |