Flux of Particulate Matter Through copepods in the Northeast Water Polynya
Particulate organic carbon (POC) and nitrogen (PON) production by large calanoid copepods was investigated on the northeast Greenland shelf during August 1992 and May to August 1993. Both Calanus hyperboreus and C. glacialis females, when suspended in seawater collected from the chlorophyll maximum,...
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Digital Commons @ University of South Florida
1997
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-1864 2023-07-30T04:01:38+02:00 Flux of Particulate Matter Through copepods in the Northeast Water Polynya Daly, Kendra L. 1997-01-01T08:00:00Z https://digitalcommons.usf.edu/msc_facpub/837 https://doi.org/10.1016/S0924-7963(96)00062-0 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/837 doi:10.1016/S0924-7963(96)00062-0 https://doi.org/10.1016/S0924-7963(96)00062-0 Marine Science Faculty Publications Arctic marine ecosystems copepods biogeochemical fluxes carbon cycle nitrogen cycle Life Sciences article 1997 ftusouthflorida https://doi.org/10.1016/S0924-7963(96)00062-0 2023-07-13T20:46:05Z Particulate organic carbon (POC) and nitrogen (PON) production by large calanoid copepods was investigated on the northeast Greenland shelf during August 1992 and May to August 1993. Both Calanus hyperboreus and C. glacialis females, when suspended in seawater collected from the chlorophyll maximum, produced about 40 pellets per day, which contained a carbon and nitrogen content equivalent to 8% and 6% of body carbon, respectively, and 2% of body nitrogen. In experiments, the carbon:nitrogen (C:N) ratio by weight of suspended particulates, C. hyperboreus, and fecal pellets was 6.7, 7.7 and 28.5, respectively. The unusually high C:N ratio for pellets, in part, may be attributed to elevated ratios of > 20μm size fractions of particulate organic matter, the size fraction more common in the diet of these large copepods and the fraction dominated by diatoms according to microscopic and pigment data. The implied elevated C:N ratios of large phytoplankton cells were probably due to nitrogen deficiency, as shown by other studies in this region. In addition, female C. hyperboreus appeared to be more efficient in assimilating nitrogen than carbon, which also would have contributed to high C:N ratios in egested pellets. Unfractionated POC concentrations explained 54% of the variability in carbon egestion and 70% of the variability in nitrogen egestion in copepods, whereas copepod body content accounted for little of the variation on the short time scales of the experiments. Carbon egestion by C. hyperboreus was positively correlated with POC concentrations at the depth of the chlorophyll maximum, while nitrogen egestion was negatively correlated with PON concentrations in the euphotic zone. Estimates of potential community egestion rates for the upper water column indicate that copepods represent a major pathway of organic carbon transformation in this Arctic shelf system. On average, copepods may have ingested 45% of the primary production and egested fecal matter equivalent to 20% of the carbon and 12% of the nitrogen ... Article in Journal/Newspaper Arctic Calanus hyperboreus Greenland Phytoplankton Copepods University of South Florida St. Petersburg: Digital USFSP Arctic Greenland Journal of Marine Systems 10 1-4 319 342 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Arctic marine ecosystems copepods biogeochemical fluxes carbon cycle nitrogen cycle Life Sciences |
spellingShingle |
Arctic marine ecosystems copepods biogeochemical fluxes carbon cycle nitrogen cycle Life Sciences Daly, Kendra L. Flux of Particulate Matter Through copepods in the Northeast Water Polynya |
topic_facet |
Arctic marine ecosystems copepods biogeochemical fluxes carbon cycle nitrogen cycle Life Sciences |
description |
Particulate organic carbon (POC) and nitrogen (PON) production by large calanoid copepods was investigated on the northeast Greenland shelf during August 1992 and May to August 1993. Both Calanus hyperboreus and C. glacialis females, when suspended in seawater collected from the chlorophyll maximum, produced about 40 pellets per day, which contained a carbon and nitrogen content equivalent to 8% and 6% of body carbon, respectively, and 2% of body nitrogen. In experiments, the carbon:nitrogen (C:N) ratio by weight of suspended particulates, C. hyperboreus, and fecal pellets was 6.7, 7.7 and 28.5, respectively. The unusually high C:N ratio for pellets, in part, may be attributed to elevated ratios of > 20μm size fractions of particulate organic matter, the size fraction more common in the diet of these large copepods and the fraction dominated by diatoms according to microscopic and pigment data. The implied elevated C:N ratios of large phytoplankton cells were probably due to nitrogen deficiency, as shown by other studies in this region. In addition, female C. hyperboreus appeared to be more efficient in assimilating nitrogen than carbon, which also would have contributed to high C:N ratios in egested pellets. Unfractionated POC concentrations explained 54% of the variability in carbon egestion and 70% of the variability in nitrogen egestion in copepods, whereas copepod body content accounted for little of the variation on the short time scales of the experiments. Carbon egestion by C. hyperboreus was positively correlated with POC concentrations at the depth of the chlorophyll maximum, while nitrogen egestion was negatively correlated with PON concentrations in the euphotic zone. Estimates of potential community egestion rates for the upper water column indicate that copepods represent a major pathway of organic carbon transformation in this Arctic shelf system. On average, copepods may have ingested 45% of the primary production and egested fecal matter equivalent to 20% of the carbon and 12% of the nitrogen ... |
format |
Article in Journal/Newspaper |
author |
Daly, Kendra L. |
author_facet |
Daly, Kendra L. |
author_sort |
Daly, Kendra L. |
title |
Flux of Particulate Matter Through copepods in the Northeast Water Polynya |
title_short |
Flux of Particulate Matter Through copepods in the Northeast Water Polynya |
title_full |
Flux of Particulate Matter Through copepods in the Northeast Water Polynya |
title_fullStr |
Flux of Particulate Matter Through copepods in the Northeast Water Polynya |
title_full_unstemmed |
Flux of Particulate Matter Through copepods in the Northeast Water Polynya |
title_sort |
flux of particulate matter through copepods in the northeast water polynya |
publisher |
Digital Commons @ University of South Florida |
publishDate |
1997 |
url |
https://digitalcommons.usf.edu/msc_facpub/837 https://doi.org/10.1016/S0924-7963(96)00062-0 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Calanus hyperboreus Greenland Phytoplankton Copepods |
genre_facet |
Arctic Calanus hyperboreus Greenland Phytoplankton Copepods |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/837 doi:10.1016/S0924-7963(96)00062-0 https://doi.org/10.1016/S0924-7963(96)00062-0 |
op_doi |
https://doi.org/10.1016/S0924-7963(96)00062-0 |
container_title |
Journal of Marine Systems |
container_volume |
10 |
container_issue |
1-4 |
container_start_page |
319 |
op_container_end_page |
342 |
_version_ |
1772812412097921024 |