| Issue |
Annls Limnol.
Volume 25, Number 3, 1989
|
|
|---|---|---|
| Page(s) | 205 - 213 | |
| DOI | https://doi.org/10.1051/limn/1989021 | |
| Published online | 15 August 2009 | |
Analyse de la distribution des malacocénoses de 23 lacs français
Distribution of mollusc communities in 23 French lakes
Laboratoire d'Hydrobiologie du CEMAGREF - 3, quai
Chauveau 69336 Lyon Cédex 09
L'application de techniques d'analyses multivariées à l'inventaire malacologique de 23 lacs d'altitude moyenne montre que, suivant l'axe 1 exprimant "l'effet profondeur", s'effectue une simplification verticale des peuplements. L'axe 2 semble essentiellement traduire une modification des malacocénoses sous l'effet d'une accumulation croissante des matières organiques dont l'importance sur la structure et la distribution des peuplements est ainsi mise en évidence.
Abstract
The freshwater Mollusca populations of 23 French lakes situated between 478 and 1152 m height are analysed by means of a factorial correspondence analysis. The first axis represents a "depth effect" factor characterized by a vertical simplification of mollusc communities. The second axis which separates mollusc populations of the littoral zones suggests that the organic matter is the chief factor in the species distribution.
Mots clés : mollusques / lacs / analyses multivariées / matière organique
Key words: mollusca / lakes / multivariates analysis / organic matter
© Masson, 1989
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