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dc.contributor.authorIngole, B.S.
dc.contributor.authorDhargalkar, V.K.
dc.date.accessioned2009-01-11T11:51:26Z
dc.date.available2009-01-11T11:51:26Z
dc.date.issued1998
dc.identifier.citationCurrent Science, Vol.74; 529-534p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/1888
dc.description.abstractThe scale and magnitude of probable impact of human activities over a decade (1983-1994) on the freshwater lake Priyadarshini, at Schirmacher Oasis, East Antarctica, was assessed through an ecological study conducted over an annual cycle during January 1993 to January 1994. Air temperature ranged from -34.5 degrees C to +8.2 degrees C, water temperature (below frozen layer) from -1.5 degrees to +4.7 degrees C, and pH from 8.10 to 8.77. Dissolved oxygen varied from 8.4 to 12.1 mg l sup(-1) with higher values during winter months (June-July). The biological parameters - phytoplankton, chlorophyll-a and microbenthos - showed a bi-modal pattern of fluctuations with one maxima in austral summer and another in spring (late winter). Fluctuations in the hydrobiological parameters were closely related to meteorological conditions over the area. Biological productivity of the lake was dependent on the availability of ice-free water and increase in atmospheric temperature. An in-depth analysis and comparison of certain lake environmental aspects over a decadal period indicate that the lake environment is in a healthy condition. However, intensive human activities in the catchment area may deteriorate the ecosystem and hence regular monitoring and stringent regulations are needed to maintain its quality.
dc.language.isoen
dc.publisherCurrent Science Association
dc.rightsCopyright [1998]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subjectfreshwater lakes
dc.subjectfreshwater ecology
dc.subjectman-induced effects
dc.subjectair temperature
dc.subjectwater temperature
dc.subjectph
dc.subjectdissolved oxygen
dc.subjecthydrobiology
dc.subjectbiological production
dc.titleEcobiological assessment of a freshwater lake at Schirmacher Oasis, East Antarctica, with reference to human activities
dc.typeJournal Article


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