Plankton abundance and feeding characteristics of Thysanoessa raschii from Godthabsfjord, Greenland
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2011
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| _version_ | 1867171364976197632 |
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| author | Agersted, Mette Dalgaard Nielsen, Torkel Gissel Munk, Peter Vismann, Bent Arendt, Kristine Engel |
| author_facet | Agersted, Mette Dalgaard Nielsen, Torkel Gissel Munk, Peter Vismann, Bent Arendt, Kristine Engel |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Despite being a key zooplankton group, knowledge on krill biology from the Arctic is inadequate. The present study examine the functional biology and evaluate the trophic role of krill in the Godthabsfjord (64°N, 51°W) SW Greenland, through a combination of fieldwork and laboratory experiments. Krill biomass was highest in the middle fjord and inner fjord, whereas no krill was found offshore. The dominating species Thysanoessa raschii revealed a type III functional response when fed with the diatom Thalassiosira weissflogii. At food saturation, T. raschii exhibited a daily ration of 1% body C/d. Furthermore, T. raschii was capable of exploiting plankton cells from 5 to 400 µm, covering several trophic levels of the pelagic food web. The calculated grazing impact by T. raschii on the fjord plankton community was negligible. However, the schooling and migratory behaviour of krill will concentrate and elevate the grazing in specific areas of the euphotic zone. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_805981 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Plankton abundance and feeding characteristics of Thysanoessa raschii from Godthabsfjord, Greenland Agersted, Mette Dalgaard Nielsen, Torkel Gissel Munk, Peter Vismann, Bent Arendt, Kristine Engel International Polar Year (2007-2008); IPY Despite being a key zooplankton group, knowledge on krill biology from the Arctic is inadequate. The present study examine the functional biology and evaluate the trophic role of krill in the Godthabsfjord (64°N, 51°W) SW Greenland, through a combination of fieldwork and laboratory experiments. Krill biomass was highest in the middle fjord and inner fjord, whereas no krill was found offshore. The dominating species Thysanoessa raschii revealed a type III functional response when fed with the diatom Thalassiosira weissflogii. At food saturation, T. raschii exhibited a daily ration of 1% body C/d. Furthermore, T. raschii was capable of exploiting plankton cells from 5 to 400 µm, covering several trophic levels of the pelagic food web. The calculated grazing impact by T. raschii on the fjord plankton community was negligible. However, the schooling and migratory behaviour of krill will concentrate and elevate the grazing in specific areas of the euphotic zone. |
| title | Plankton abundance and feeding characteristics of Thysanoessa raschii from Godthabsfjord, Greenland |
| topic | International Polar Year (2007-2008); IPY |
| url | https://doi.org/10.1594/PANGAEA.805981 |