Abstract
The aim of this study was to compare the diversity of small rodents along four unequally disturbed habitats in a low deciduous forest in Dzilam de Bravo, Yucatan: an abandoned pastureland (AP) with five-year old (SCA), ten-year old (SDA), and more than ten-year old (SMD) forests. A total of 478 rodents were captured with 1,754 recaptures from May 2005 to April 2006. They were included in six species and two families. Our work was done in two grids of 5,000 m 2 with a distance of 10 m between rows and columns; Sherman’s traps were set two nights per month in all sites. The habitat with the highest diversity ( H’ = 1.328) and specific richness was the site with the highest disturbance and the lowest diversity ( H’ = 0.6321) (PA), but the highest abundance was in the SMD forest. Differences in diversity among sites were significant ( P < 0.05), except between SCA and SDA forests. The abundance values differed strongly in all sites. The abundance patterns of O. phyllotis were influenced by a disturbance gradient due to human influence and topography of the area, factors associated to the diversity observed. Key words: Diversity, abundance, disturbance gradient, small rodents, low deciduous forest, Yucatan, Mexico.
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