Yliopiston etusivulle Suomeksi På svenska In English Helsingin yliopisto

Habitat use by endemic and introduced rodents along a gradient of forest disturbance in Madagascar

Show full item record

Avaa tiedosto Vie RefWorksiin
Title: Habitat use by endemic and introduced rodents along a gradient of forest disturbance in Madagascar
Author: Lehtonen, J.T.; Mustonen, O.; Ramiarinjanahary, H.; Niemelä, J.; Rita, H.
Citation: Lehtonen, J.T. et al. 2001. Habitat use by endemic and introduced rodents along a gradient of forest disturbance in Madagascar.Biodiversity and Conservation 10: 1185–1202.
ISSN: 1572-9710
Abstract: We used logistic and Poisson regression models to determine factors of forest and landscape structure that influence the presence and abundance of rodent species in the rain forest of Ranomafana National Park in southeastern Madagascar. Rodents were collected using live-traps along a gradient of human disturbance. All five endemic rodent species (Nesomys rufus, N. audeberti, Eliurus tanala, E. minor and E. webbi) and the introduced rat Rattus rattus were captured in both secondary and primary forests, but the introduced Mus musculus was only trapped in secondary forest. The abundance of R. rattus increased with the level of habitat disturbance, and it was most common in the heavily logged secondary forest.

Furthermore, the probability of the presence of R. rattus increased with decreasing distance from forest edge and decreasing canopy cover, while the probability of presence increased with increasing herbaceous cover, altitude and overstory tree height. The species was never observed farther than 500 m away from human habitation or camp-site. N. rufus prefered selectively-logged forest at altitudes above 900 m a.s.l. Its probability of presence increased with increasing canopy cover, herbaceous cover and distance from forest edge, and with decreasing density of fallen logs, overstory tree height and distance from human habitation.

N. audeberti prefered heavily-logged areas, while E. tanala was the only species occurring along the entire range of forest disturbance. We suggest that in the Ranomafana National Park the spread of R. rattus is associated with deforestation.
URI: http://hdl.handle.net/1975/221
Date: 2001

Files in this item

Files Description Size Format View/Open
2001-Habitat_use_by_endemic.pdf 261.4Kb PDF View/Open
This item appears in the following Collection(s)

Show full item record

Search Helda


Advanced Search

Browse

My Account