Estimation of zooplankton mortality caused by an Arctic glacier outflow
The outflow of freshwater from underwater channels in the Kongsbreen tidal glacier in Kongsfjorden, Svalbard, 79<sup>o</sup>N, was measured as 138.8 m<sup>3</sup> s<sup>-1</sup> at the peak of the melting season. Experiments on local marine plankton mortality sho...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2001-09-01
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| Series: | Oceanologia |
| Subjects: | |
| Online Access: | http://www.iopan.gda.pl/oceanologia/43_3.html#A6 |
| _version_ | 1818292920531288064 |
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| author | Marek J. Zaj±czkowski Joanna Lege¿ynska |
| author_facet | Marek J. Zaj±czkowski Joanna Lege¿ynska |
| author_sort | Marek J. Zaj±czkowski |
| collection | DOAJ |
| description | The outflow of freshwater from underwater channels in the Kongsbreen tidal glacier in Kongsfjorden, Svalbard, 79<sup>o</sup>N, was measured as 138.8 m<sup>3</sup> s<sup>-1</sup> at the peak of the melting season. Experiments on local marine plankton mortality show that when exposed to salinities below 9 PSU, all copepods die within 15 minutes. We estimate that during 100 days of the melting season, as many as 85 tonnes wet weight (WW) of plankton is removed from the water column due to osmotic shock, which makes up 15% of the standing zooplankton biomass of the fjord. The dead zooplankton sinks after exposure to low salinities and is probably an important food source for scavenging benthic fauna in the fjord. This mechanism could be responsible for the high numbers of <i>Onisimus caricus</i> near the glacier front. |
| first_indexed | 2024-12-13T03:07:37Z |
| format | Article |
| id | doaj.art-244aa29e37804e9b8cbb0fa8010df9f6 |
| institution | Directory Open Access Journal |
| issn | 0078-3234 |
| language | English |
| last_indexed | 2024-12-13T03:07:37Z |
| publishDate | 2001-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Oceanologia |
| spelling | doaj.art-244aa29e37804e9b8cbb0fa8010df9f62022-12-22T00:01:40ZengElsevierOceanologia0078-32342001-09-01433341351Estimation of zooplankton mortality caused by an Arctic glacier outflowMarek J. Zaj±czkowskiJoanna Lege¿ynskaThe outflow of freshwater from underwater channels in the Kongsbreen tidal glacier in Kongsfjorden, Svalbard, 79<sup>o</sup>N, was measured as 138.8 m<sup>3</sup> s<sup>-1</sup> at the peak of the melting season. Experiments on local marine plankton mortality show that when exposed to salinities below 9 PSU, all copepods die within 15 minutes. We estimate that during 100 days of the melting season, as many as 85 tonnes wet weight (WW) of plankton is removed from the water column due to osmotic shock, which makes up 15% of the standing zooplankton biomass of the fjord. The dead zooplankton sinks after exposure to low salinities and is probably an important food source for scavenging benthic fauna in the fjord. This mechanism could be responsible for the high numbers of <i>Onisimus caricus</i> near the glacier front.http://www.iopan.gda.pl/oceanologia/43_3.html#A6ArcticPlankton mortalityGlaciers |
| spellingShingle | Marek J. Zaj±czkowski Joanna Lege¿ynska Estimation of zooplankton mortality caused by an Arctic glacier outflow Oceanologia Arctic Plankton mortality Glaciers |
| title | Estimation of zooplankton mortality caused by an Arctic glacier outflow |
| title_full | Estimation of zooplankton mortality caused by an Arctic glacier outflow |
| title_fullStr | Estimation of zooplankton mortality caused by an Arctic glacier outflow |
| title_full_unstemmed | Estimation of zooplankton mortality caused by an Arctic glacier outflow |
| title_short | Estimation of zooplankton mortality caused by an Arctic glacier outflow |
| title_sort | estimation of zooplankton mortality caused by an arctic glacier outflow |
| topic | Arctic Plankton mortality Glaciers |
| url | http://www.iopan.gda.pl/oceanologia/43_3.html#A6 |
| work_keys_str_mv | AT marekjzajczkowski estimationofzooplanktonmortalitycausedbyanarcticglacieroutflow AT joannalegeynska estimationofzooplanktonmortalitycausedbyanarcticglacieroutflow |