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Titre :
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The importance of habitat diversity and connectivity for fishes in the Toess River with special emphasis on temporarily isolated pools
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Auteurs :
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P. Ulmann
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Type de document :
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thèse/mémoire
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Année de publication :
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1998
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Format :
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195 p.
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Note générale :
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Sommaire et microfiches conservés à la cote K2393
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Langues:
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= Anglais
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Catégories :
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ECOLOGIE ETUDE DES ECOSYSTEMES
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Mots-clés:
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COURS D'EAU
;
HABITAT
;
POISSON
;
CYPRINIDAE
;
PLAINE D'INONDATION
;
JUVENILE
;
MORPHOLOGIE FLUVIALE
;
CLASSE D'AGE
;
ESPECE
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Résumé :
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Between 1994 and 1998 different fish biology projects were conducted in the River Toess in Canton Zurich, Switzerland. The River Toess is a fourth-order stream having a catchment area of more than 400 square kilometers. As is typical for a river in the Swiss Midlands, contains a series of artificial weirs and the river is heavily altered along most of its 50 km length. In the lower section near its concluence with the Rhine River, however, the River Toess shows an almost natural morphology and pristine pool/riffle structure. The different research projects were developed to investigate the topics of importance for habitat conditions. The fish species, the different age-classed and the abundances of different classes were taken as integral measures of habitat quality. The overriding theme of the research was the role of functional and structural connectivity between the different habitats. An attempt was made to consider the different scales and levels of biotic organisation.
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Diplôme :
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Dissertation for the degree of Doctor of Natural Sciences, Swiss Federal Institute of Technology, Zurich CH
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