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Grazing rates of calanoid copepod (Paralabidocera antarctica) in a continental Antarctic lake

Citation

Swadling, KM and Gibson, JAE, Grazing rates of calanoid copepod (Paralabidocera antarctica) in a continental Antarctic lake, Polar Biology, 23, (5) pp. 301-308. ISSN 0722-4060 (2000) [Refereed Article]

DOI: doi:10.1007/s003000050449

Abstract

The presence of crustaceans in some Antarctic lakes adds a level of complexity to the food webs of these environments. The grazing pressure of the crustaceans on phytoplankton and other protists, and the role they play in controlling food web structure, has not yet been examined in any detail. This paper presents the first data on grazing pressure of crustacean zooplankton in continental Antarctic lakes. In this study the grazing rates of Paralabidocera antarctica in saline Ace Lake, Vestfold Hills, were assessed using a radio-tracer method. Clearance rates ranged from approximately 1 to 8 ml ind.-1 day-1, depending on developmental stage. Due to their high abundance, nauplii exhibited the highest daily carbon ingestion rates. The population cleared about 3% of the water column per day, accounting for a significant fraction of primary production. P. antarctica has a considerable impact on the carbon cycle in Ace Lake and, by inference, in the other lakes in which it occurs.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Evolutionary Biology
Research Field:Animal Systematics and Taxonomy
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Antarctic and Sub-Antarctic Flora, Fauna and Biodiversity
Author:Swadling, KM (Dr Kerrie Swadling)
Author:Gibson, JAE (Dr John Gibson)
ID Code:50640
Year Published:2000
Web of Science® Times Cited:7
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2008-05-19
Last Modified:2011-11-24
Downloads:0

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