Physiological Tolerances of Some Antarctic ZooplanktonsEntry ID: ASAC_308
Abstract: Colonisation of Lake Fletcher, a hypersaline, meromictic lake in the Vestfold Hills, Antarctica, by the calanoid copepod Drepanopus bispinosus, the cyclopoid copepod Oncea curvata and an undescribed cydippid ctenophore is discussed. In 1978, salinity direstly under the ice was 66 ppt and repeated net hauls found no zooplankton. In 1983, adults of D. bispinosus were found, and in 1984, a ... reproductively active population of this species. Surface water salinity in 1984 was 56 ppt. During winter 1986, surface salinity was 54 ppt and three zooplankton species (D. bispinosus, O curvata and an undescribed cydippid ctenophore) had established populations in the lake. In 1986/87, high tides caused nearby Taynaya Bay to flood into the lake, and three further species (the calanoid, Paralabidocera antarctica, and two harpacticoids, Harpacticus furcatus and Idomene sp.) were found in the lake. It appears that periodic flooding after 1978 caused a salinity decrease in the lake from 66 to 54 ppt, and this enabled some invertebrate species to maintain year-round populations, whereas others require marine incursions to re-establish summer only populations.
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Data Set Citation
Dataset Originator/Creator: Burton, H.
Dataset Title: Physiological Tolerances of Some Antarctic Zooplanktons
Dataset Series Name: CAASM Metadata
Dataset Release Date: 2003-03-17
Dataset Publisher: Australian Antarctic Data Centre
Dataset DOI: doi:10.4225/15/57C917914860DOnline Resource: https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD...
Start Date: 1978-01-01Stop Date: 1987-02-20
Quality Start date given in temporal coverage is approximate only. The year is correct.
Access Constraints These data are publicly available for download from the provided URL. Files are stored as excel spreadsheets.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_308 when using these data.
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Distribution Media: HTTP
Distribution Size: 5 kb
Distribution Format: .xls
Eslake, D., Kirkwood, R., Burton, H., Wang, Zipan (1991), Temporal changes in zooplankton composition in a hypersaline, Antarctic lake subject to periodic seawater incursions., Hydrobiologia, 210, 93-99
Eslake, D., Kirkwood, R., Burton, H.R., Wang, Zipan (1988), The effect of spatial and temporal salinity changes on a copepod population in a hypersaline lake subject to periodic seawater incursions (Abstract)., Fifth SCAR Symposium on Antarctic Biology
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2000-07-26
Last DIF Revision Date: 2016-10-18