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Trophic Niche Partitioning Between Two Native and Two Exotic Carnivores in SW Portugal : Volume 7, Issue 1 (30/05/2007)

By Santos, M. J.

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Book Id: WPLBN0004023382
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Trophic Niche Partitioning Between Two Native and Two Exotic Carnivores in SW Portugal : Volume 7, Issue 1 (30/05/2007)  
Author: Santos, M. J.
Volume: Vol. 7, Issue 1
Language: English
Subject: Science, Ecology
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Santos, M. J., Pinto, B. M., & Santos-Reis, M. (2007). Trophic Niche Partitioning Between Two Native and Two Exotic Carnivores in SW Portugal : Volume 7, Issue 1 (30/05/2007). Retrieved from

Description: Univ. de Lisboa, Centro de Biologia Ambiental, Faculdade de Ciências, Ed. C2, 3° Piso, Campo Grande, 1749016 Lisboa, Portugal. The introduction of exotic species is one of the most pervasive consequences of the increased human mobility. The most known negative effects are the decrease or extinction of natives. The common-genet, Genetta genetta, and the Egyptian mongoose, Herpestes ichneumon, were introduced in the Iberian Peninsula in the 15th and 19th centuries, respectively. The competitive exclusion principle defines that two ecologically similar species cannot coexist. Thus, some degree of partitioning has to occur in species realized niche, which can occur at the trophic level. To test this hypothesis of partitioning we compared the diet of these two exotic species with that of two native species (stone marten, Martes foina, and red fox, Vulpes vulpes). The results show a high degree of overlap (>45%) between the diets of species similar in their feeding strategies (arboreal and ground feeding). Nonetheless, at the finer scale of prey consumed at the species level some differences are found between the native and exotic species. These results suggest that if coexistence is due to trophic niche partitioning it only occurs at the level of the consumed species. However, coexistence may also be due to a combination of different strategies (home-range size, time and space use) that structured the different realized niches of each species.

Trophic niche partitioning between two native and two exotic carnivores in SW Portugal


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