Theoretical habitat templets, species traits, and species richness: fish in the Upper Rhône River and its floodplain
Identifieur interne : 001333 ( Main/Exploration ); précédent : 001332; suivant : 001334Theoretical habitat templets, species traits, and species richness: fish in the Upper Rhône River and its floodplain
Auteurs : Henri Persat [France] ; Jean-Michel Olivier [France] ; Didier Pont [France]Source :
- Freshwater Biology [ 0046-5070 ] ; 1994-06.
Abstract
1 Recent developments in ecological theory concerned with habitat templets, species assemblages, and life history traits were examined for the riverine fish communities of the Upper Rhône River, France, in the context of spatial–temporal habitat variability. Relationships among species traits, habitat utilization of species, the relationship between species traits and habitat utilization, and trends of species traits and species richness in the spatial–temporal variability of the habitat types were analysed. 2 Relationships among twelve species traits, and utilization of eight habitats were examined for twenty‐five fish species using correspondence analysis; the relationship between species traits and habitat utilization was investigated by co‐inertia analysis. 3 Positive relationships among species traits were observed for size, fecundity, and the number of reproductive cycles per individual. However, species were not well differentiated according to the habitat utilization, except for habitats rarely connected with the main channel (i.e. two types of oxbow lakes). 4 No significant relationship was found between species traits and habitat utilization, nor for either species traits or species richness when examined in the framework of spatial–temporal habitat variability. Only two species traits corresponded (with slight trends) to predictions in a river habitat templet: (i) the number of descendants per reproductive cycle increased along with temporal variability; and (ii) the number of reproductive cycles per individual was either low or high at low temporal variability and intermediate at elevated temporal variability. 5 The discrepancy between the predictions of the river habitat templet as well as of the patch dynamics concept and the results observed for the fish in the Upper Rhône was explained in terms of scale problems, the evolutionary ecology of the European fish fauna, and the history of the Rhône River.
Url:
DOI: 10.1111/j.1365-2427.1994.tb01750.x
Affiliations:
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Relationships among species traits, habitat utilization of species, the relationship between species traits and habitat utilization, and trends of species traits and species richness in the spatial–temporal variability of the habitat types were analysed. 2 Relationships among twelve species traits, and utilization of eight habitats were examined for twenty‐five fish species using correspondence analysis; the relationship between species traits and habitat utilization was investigated by co‐inertia analysis. 3 Positive relationships among species traits were observed for size, fecundity, and the number of reproductive cycles per individual. However, species were not well differentiated according to the habitat utilization, except for habitats rarely connected with the main channel (i.e. two types of oxbow lakes). 4 No significant relationship was found between species traits and habitat utilization, nor for either species traits or species richness when examined in the framework of spatial–temporal habitat variability. Only two species traits corresponded (with slight trends) to predictions in a river habitat templet: (i) the number of descendants per reproductive cycle increased along with temporal variability; and (ii) the number of reproductive cycles per individual was either low or high at low temporal variability and intermediate at elevated temporal variability. 5 The discrepancy between the predictions of the river habitat templet as well as of the patch dynamics concept and the results observed for the fish in the Upper Rhône was explained in terms of scale problems, the evolutionary ecology of the European fish fauna, and the history of the Rhône River.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Auvergne-Rhône-Alpes</li><li>Rhône-Alpes</li></region><settlement><li>Villeurbanne</li></settlement></list><tree><country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Persat, Henri" sort="Persat, Henri" uniqKey="Persat H" first="Henri" last="Persat">Henri Persat</name></region><name sortKey="Olivier, Jean Ichel" sort="Olivier, Jean Ichel" uniqKey="Olivier J" first="Jean-Michel" last="Olivier">Jean-Michel Olivier</name><name sortKey="Pont, Didier" sort="Pont, Didier" uniqKey="Pont D" first="Didier" last="Pont">Didier Pont</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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