Alien terrestrial mammals in Brazil: current status and management
2017
The invasion of
alienspecies is an important cause of biodiversity loss worldwide, and many
mammalsare considered successful invaders outside their former range, with recognized detrimental effects to native ecosystems. Our aim was to review the current literature on
alien
mammalsthat have established feral populations in Brazil and to systematize the existing knowledge. Furthermore, we evaluated the current distributions of all invasion
mammalsand discuss different management actions, including eradication techniques for island populations. We found 17 species of
alien
mammalsliving in the wild in Brazil. Based on the current literature and databases regarding
invasive species, Lepus europaeus and Sus scrofa had the largest distributions in the Brazilian territory and seem to continue expanding their geographic distributions. Feral dogs and cats were the main
alienpredators threatening
wildlife conservation, especially in protected areas. Further, we call attention to the invasion of
Bubalusbubalis, a large species that currently thrives in isolated populations but seems to be quickly expanding its distribution. In conclusion,
alien
mammalsare widespread in Southern and Southeastern Brazil, but at least four
ungulatespecies (Indian sambar, horse, goat, and axis deer) still have small and isolated populations. Finally, future efforts need to evaluate the impacts of
alien
mammalsin Brazil and techniques for their control.
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