Meny

Javascript verkar inte påslaget? - Vissa delar av Lunds universitets webbplats fungerar inte optimalt utan javascript, kontrollera din webbläsares inställningar.
Du är här

Zooplankton feeding on algae and bacteria under ice in Lake Druzhby, East Antarctica

Författare:
  • Christin Säwström
  • Jan Karlsson
  • Johanna Laybourn-Parry
  • Wilhelm Granéli
Publiceringsår: 2009
Språk: Engelska
Sidor: 1195-1202
Publikation/Tidskrift/Serie: Polar Biology
Volym: 32
Nummer: 8
Dokumenttyp: Artikel i tidskrift
Förlag: Springer

Abstract english

The feeding of the cladoceran Daphniopsis studeri on algae and bacteria was investigated under ice in an ultra-oligotrophic Antarctic lake from late autumn (May) to early spring (October) in 2004. D. studeri fed on both algae and bacteria with estimated filtering rates of 0.048 and 0.061 l ind(-1) day(-1)), respectively. Algae seemed to be the major food resource for the D. studeri population, however at times of low algal densities the bacterioplankton represented an important alternative food resource. The D. studeri grazing impact on the algal and bacterial standing stock was in general low (0.6-4.6% removed per day), but during the winter period this organism can remove up to 34% of the bacterial production (BP). At times D. studeri grazing can temporarily have a significant impact on the BP rates, though their impact was relatively low when compared to viral-induced bacterial mortality in the lake.

Keywords

  • Ecology
  • Zooplankton
  • Algae
  • Antarctic lake
  • Bacteria
  • Feeding rates

Other

Published
  • ISSN: 1432-2056
Wilhelm Granéli
E-post: wilhelm [dot] graneli [at] biol [dot] lu [dot] se

Professor emeritus

Akvatisk ekologi

+46 70 279 82 34

E-D123

50

Forskargrupp

Akvatisk ekologi