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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Predicting animal cadmium concentrations in lakes

Article Abstract:

The laboratory-based free ion activity model is used to determine the cadmium (Cd) concentrations in aquatic organisms that act as biomonitors for the prediction of biologically related Cd concentrations in lakes. In the aquatic insect larva, Chaoborus punctipennis, the complexation between Cd and organic matter, and the struggle of hydrogen and Cd ions for biological uptake sites regulates the Cd level in the organism. The larvae act as an effective biomonitor as they are wide spread, and found over a range of pH, organic matter and metal content.

Author: Hare, Landis, Tessier, Andre
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
Usage, Observations, Cadmium, Aquatic animals

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Ecocide in the Caspian Sea

Article Abstract:

Flooding from the rising level of Caspian sea, which began in 1978, is causing grave ecological problems for Russia, Kazakhstan, Turkmenistan, Iran, Azerbaijan, and the countries surrounding it, according to a joint study by the World Bank and the United Nations. Ecological complications may turn the Caspian into a dead sea. Impact of the poor ecological management by the former Soviet Union government and toxicological wastes leakage into the lake is discussed. Proposed conservation plans for improving the situation are discussed.

Author: Dumont, Henri
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
Environmental policy, Caspian Sea, Former Soviet Union

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Lakes under a three-pronged attack

Article Abstract:

Climate warming, acid deposition, and ozone depletion are the causes of environmental damage to lakes in Canada. The ultraviolet radiation (UV) penetrates into lake waters, inhibiting phytoplankton photosynthesis and increasing plant fungal infections. Climate warming and acid rain reduce dissolved organic carbon compounds, which inhibit the deeper penetration of UV-rays into the water. The environmental damage to lakes is a cause of concern among the scientific communities.

Author: Gorham, Eville
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
Canada, Environmental impact analysis, Ozone layer depletion

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Subjects list: Environmental aspects, Lakes
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