Estimation of zooplankton mortality caused by an Arctic glacier outflow

• Autorzy: Zajączkowski M. J. , Legeżyńska J.
• Języki publikacji: EN

Abstrakty

EN

The outflow of freshwater from underwater channels in the Kongsbreen tidal glacier in Kongsfjorden, Svalbard, 79oN, was measured as 138.8 m3 s-1 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 Onisimus caricus near the glacier front.

Słowa kluczowe

EN

Arctic; plankton mortality; glaciers

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2001
• Tom: No. 43 (3)
• Strony: 341--351
• Opis fizyczny: Bibliogr. 25 poz., tab., wykr.

Twórcy

autor

Zajączkowski M. J.

autor

Legeżyńska J.

• Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, PL-81-712 Sopot, Poland,