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Trace element distributions in an antarctic meromictic lake

Trace element distributions in an antarctic meromictic lake 1. The relative abundance in Lake Bonney of the trace elements studied was B≫M>Fe>Cu>Ni>Mo>Co, with more than 90 per cent of each element in the monimolimnion. 2. The monimolimnion contains concentrations of B which are probably toxic to phytoplankton, and Cu concentrations which are at least potetially toxic to these organisms. 3. Concentrations of B, Cu, and Mn in the mixolimnion occassionally reach potentially toxic concentrations, but there exist mitigating influences such as high calcium levels. 4. The relative amounts of trace elements contributed by the Sollas-Lacroix meltstream to the lake were Mn>Fe>Cu>Ni≃Co>B. Except for Co and Mo, the Sollas-Lacroix meltstream did not appear to contribute trace elements in quantities which would explain the weekly changes found in the mixolimnion. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aquatic Ecology Springer Journals

Trace element distributions in an antarctic meromictic lake

Weand, Barron; Hoehn, Robert; Parker, Bruce
Aquatic Ecology , Volume 10 (2) – Dec 1, 2005
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References (33)

Publisher
Springer Journals
Copyright
Copyright
Subject
Life Sciences; Freshwater & Marine Ecology; Ecosystems
ISSN
1386-2588
eISSN
1573-5125
DOI
10.1007/BF02282218
Publisher site
See Article on Publisher Site

Abstract

1. The relative abundance in Lake Bonney of the trace elements studied was B≫M>Fe>Cu>Ni>Mo>Co, with more than 90 per cent of each element in the monimolimnion. 2. The monimolimnion contains concentrations of B which are probably toxic to phytoplankton, and Cu concentrations which are at least potetially toxic to these organisms. 3. Concentrations of B, Cu, and Mn in the mixolimnion occassionally reach potentially toxic concentrations, but there exist mitigating influences such as high calcium levels. 4. The relative amounts of trace elements contributed by the Sollas-Lacroix meltstream to the lake were Mn>Fe>Cu>Ni≃Co>B. Except for Co and Mo, the Sollas-Lacroix meltstream did not appear to contribute trace elements in quantities which would explain the weekly changes found in the mixolimnion.

Journal

Aquatic Ecology – Springer Journals

Published: Dec 1, 2005

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