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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Density and population size of mammals introduced on a land-bridge island in southeastern Brazil

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Author(s):
Bovendorp, Ricardo Siqueira ; Galetti, Mauro [2]
Total Authors: 2
Document type: Journal article
Source: Biological Invasions; v. 9, n. 3, p. 353-357, Apr. 2007.
Field of knowledge: Biological Sciences - Ecology
Abstract

The introduction of alien species is one of the main threats to the conservation of native species, especially in island ecosystems. Here, we report on the population growth of 15 species of mammals introduced in 1983 on the island of Anchieta, an 828 ha land-bridge island in southeastern Brazil. We estimated the density of mammals through 296 km of line transect census. Five species introduced became extinct (coypu, brocket deer, six-banded armadillo, nine-banded armadillo, maned three-toed sloth); six became overabundant (marmoset, coati, agouti, seven-banded armadillo, and capybara); one has a stable population (capuchin monkey). Anchieta Island has the highest density of mammals in the entire Atlantic forest (486.77 ind/km2), especially nest predators (232.83 ind/km2) and herbivores (253.58 ind/km2). Agoutis (Dasyprocta spp.) and marmosets (Callithrix penicillata) were, by far, the species with the highest population growth. The high density of mammals in this island may have strong consequences for plant recruitment and bird diversity. (AU)

FAPESP's process: 01/14463-5 - Diagnosis of populations of birds and cynegetic mammals in the conservation units of the São Paulo Atlantic Rainforest
Grantee:Mauro Galetti Rodrigues
Support Opportunities: BIOTA-FAPESP Program - Regular Research Grants