Relationships between macrophytic vegetation and physical features of river habitats: the need for a morphological approach

Hydrobiologia - Tập 570 - Trang 11-17 - 2006
H. Daniel1, I. Bernez2,3, J. Haury2
1Institut National d’Horticulture, UMR A 462 SAGAH INRA/INH/Univ. Angers, Angers Cedex 01, France
2Agrocampus Rennes, UMR INRA-Agrocampus Ecobiologie et Qualité des Hydrosystèmes Continentaux, Rennes Cedex, France
3Forestry Department, Instituto Superior de Agronomia, Univ. Tech. Lisboa, Lisboa Codex, Portugal

Tóm tắt

The aim of this paper is to study the relationships between the physical features of rivers and the distribution of macrophyte vegetation. Field work was undertaken at 207 stations along the Scorff River and its tributaries, a salmon river system in southern Brittany (western France). The physical features were considered using a principal component analysis (PCA). Stepwise multiple regression models made it possible to assess their relationships with the botanical data. The first five axes of the physical PCA (used as explicative variables) were initially linked to the most frequently surveyed species, then to their eco-morphological types, and, finally to Arber’s (1920. Water Plants. A Study of Aquatic Angiosperms. Cambridge Univ. Press, Cambridge, 414 pp) morphological classification. It was concluded that plant morphology was closely related to these environmental factors. This could contribute to the development of predictive models for plant distribution and could increase the knowledge of reference vegetation related to bioindication systems.

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Hydrobiologia

Tập 570

11-17

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