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Observations on impaired vitality of Unio crassus (Bivalvia: Najadae) populations in conjunction with elevated nitrate concentration in running waters

Observations on impaired vitality of Unio crassus (Bivalvia: Najadae) populations in conjunction... A number of publications show relationships between impairment of vitality and reproduction as well as excessive shares of aged individuals within populations of Unio crassus with nitrate concentrations in the field. Our own examination of available data on nitrate concentrations in selected rivers of Brandenburg with known remainder populations of Unio crassus and of rivers without that species confirmed that above 2 mg L–1 NO3–‐N Unio crassus populations are impaired. Current toxicity data on nitrate do not indicate any mechanism by which the observations can be explained. Probably high NO3–‐N concentrations and the impaired production and vitality of Unio crassus populations share the same causes. These need to be identified. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta hydrochimica et hydrobiologica Wiley

Observations on impaired vitality of Unio crassus (Bivalvia: Najadae) populations in conjunction with elevated nitrate concentration in running waters

Acta hydrochimica et hydrobiologica , Volume 34 (4) – Aug 1, 2006

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References (1)

Publisher
Wiley
Copyright
Copyright © 2006 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0323-4320
eISSN
1521-401X
DOI
10.1002/aheh.200500635
Publisher site
See Article on Publisher Site

Abstract

A number of publications show relationships between impairment of vitality and reproduction as well as excessive shares of aged individuals within populations of Unio crassus with nitrate concentrations in the field. Our own examination of available data on nitrate concentrations in selected rivers of Brandenburg with known remainder populations of Unio crassus and of rivers without that species confirmed that above 2 mg L–1 NO3–‐N Unio crassus populations are impaired. Current toxicity data on nitrate do not indicate any mechanism by which the observations can be explained. Probably high NO3–‐N concentrations and the impaired production and vitality of Unio crassus populations share the same causes. These need to be identified.

Journal

Acta hydrochimica et hydrobiologicaWiley

Published: Aug 1, 2006

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