Genetic Differentiation and Demographic History of the Northern Rufous Mouse Lemur ( Microcebus tavaratra ) Across a Fragmented Landscape in Northern Madagascar

摘要: Phylogeographic barriers, together with habitat loss and fragmentation, contribute to the evolution of a species’ genetic diversity by limiting gene flow increasing differentiation among populations. Changes in connectivity can thus affect populations, which may influence evolutionary potential species survival populations long term. We studied little known Northern rufous mouse lemur (Microcebus tavaratra), endemic Madagascar. focused on population M. tavaratra Loky–Manambato region, Madagascar, region delimited two permanent rivers characterized mosaic fragmented forests. genotyped 148 individuals at three mitochondrial loci (D-loop, cytb, cox2) all major forests study region. Our analyses suggest that holds average when compared other species, we identified four clusters pattern similar observed another (Propithecus tattersalli). The main cluster involved samples from mountain were connected until recently. However, river crossing does not appear be strict barrier tavaratra. Finally, inferred demographic history suggests no detectable departure stationarity over last millennia. Comparisons codistributed (P. tattersalli rodents, Eliurus spp.) both differences similarities (i.e., barriers dispersal) history. These comparisons studies are important understand effects landscape features reconstruct changes