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

Citation

Sawstrom, C and Karlsson, J and Laybourn-Parry, J and Graneli, W, Zooplankton feeding on algae and bacteria under ice in Lake Druzhby, East Antarctica, Polar Biology, 32, (online) EJ ISSN 0722-4060 (2009) [Refereed Article]


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Copyright Statement

The original publication is available at www.springerlink.com

Official URL: http://www.springerlink.com

DOI: doi:10.1007/s00300-009-0619-0

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 viralinduced bacterial mortality in the lake.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Microbiology
Research Field:Microbial Ecology
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Antarctic and Sub-Antarctic Environments
Author:Laybourn-Parry, J (Professor Johanna Laybourn-Parry)
ID Code:57520
Year Published:2009
Web of Science® Times Cited:8
Deposited By:Research Division
Deposited On:2009-07-23
Last Modified:2010-05-19
Downloads:0

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