Habitat selection in zones of parapatric contact between the Common shrew Sorex araneus and Millet's shrew S. coronatus

Détails

ID Serval
serval:BIB_A71675E6D9E1
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Habitat selection in zones of parapatric contact between the Common shrew Sorex araneus and Millet's shrew S. coronatus
Périodique
Journal of Animal Ecology
Auteur(s)
Neet C.R., Hausser J.
ISSN
0021-8790
Statut éditorial
Publié
Date de publication
1990
Volume
59
Numéro
1
Pages
235-250
Langue
anglais
Résumé
(1) The common shrew Sorex araneus and Millet's shrew S. coronatus are sibling species.They are morphologically and genetically very similar but do not hybridize. Their parapatric distribution throughout south-western Europe, with a few narrow zones of distributional overlap, suggests that they are in competitive parapatry.
(2) Two of these contact zones were studied; there was evidence of coexistence over periods of 2 years as well as habitat segregation. In both zones, the species segregated on litter thickness and humidity variables.
(3) A simple analysis of spatial distribution showed that habitats visible in the field corresponded to the habitats selected by the species. Habitat selection was found throughout the annual life-cycle of the shrews.
(4) In one contact zone, a removal experiment was performed to test whether habitat segregation is induced by interspecific interactions. The experiment showed that the species select habitats differentially when both are present and abandon habitat selection when their competitor is removed.
(5) These results confirm the role of resource partitioning in promoting narrow rangesof distributional overlap between such parapatric species and qualitatively support the prediction of habitat selection theory that, in a two-species system, coexistence may be achieved by differential habitat selection to avoid competition. The results also support the view that the common shrew and Millet's shrew are in competitive parapatry.
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Création de la notice
24/01/2008 19:13
Dernière modification de la notice
20/08/2019 16:11
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