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

Säwström, Christin LU ; Karlsson, Jan; Laybourn-Parry, Johanna and Granéli, Wilhelm LU (2009) In Polar Biology 32(8). p.1195-1202
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Zooplankton, Algae, Antarctic lake, Bacteria, Feeding rates
in
Polar Biology
volume
32
issue
8
pages
1195 - 1202
publisher
Springer
external identifiers
  • wos:000268787700010
  • scopus:70349857920
ISSN
1432-2056
DOI
10.1007/s00300-009-0619-0
language
English
LU publication?
yes
id
6677bfb4-b30f-4d94-9ad1-4053a1caf11b (old id 1477532)
date added to LUP
2009-09-22 10:55:25
date last changed
2017-10-01 03:39:22
@article{6677bfb4-b30f-4d94-9ad1-4053a1caf11b,
  abstract     = {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.},
  author       = {Säwström, Christin and Karlsson, Jan and Laybourn-Parry, Johanna and Granéli, Wilhelm},
  issn         = {1432-2056},
  keyword      = {Zooplankton,Algae,Antarctic lake,Bacteria,Feeding rates},
  language     = {eng},
  number       = {8},
  pages        = {1195--1202},
  publisher    = {Springer},
  series       = {Polar Biology},
  title        = {Zooplankton feeding on algae and bacteria under ice in Lake Druzhby, East Antarctica},
  url          = {http://dx.doi.org/10.1007/s00300-009-0619-0},
  volume       = {32},
  year         = {2009},
}