Soro A, Quezada-Euán J J G, Theodorou P, Moritz R F A, Paxton R J (2017) The
population genetics of two orchid bees suggests high dispersal, low
diploid male production and only an effect of island isolation in
lowering genetic diversity. Conservation Genetics 18(3): 607-619. DOI:10.1007/s10592-016-0912-8
Abstract
Orchid bees (Hymenoptera, Apidae, Euglossini) are important pollinators
of many plant families in Neotropical forests, habitats that have become
increasingly degraded and fragmented by agricultural practices. To
understand the extent to which loss of natural habitat and isolation has
affected the genetic diversity and diploid male production (DMP) of two
orchid bee species,Euglossa dilemma and Euglossa viridissima,
we collected and genotyped 1686 males at five microsatellite loci and
tested for differences in allelic richness, heterozygosity and DMP
across three different types of land use (natural, agricultural and
urban) and between mainland and island populations in the Yucatan
Peninsula of Mexico. We also investigated the impact of land use and
geographic isolation on gene flow. Euglossa dilemma and E. viridissima
seemed to be particularly resilient to loss of natural habitat; in
locations with human impact, we did not find reduced genetic diversity,
and populations generally showed very little population genetic
structure. Only on islands did E. dilemma
show significantly reduced genetic diversity. Even after accounting for
putative null alleles, DMP was very low (0.2–1.3%) across all sampling
sites, including on islands. We therefore suggest that DMP is an
insensitive measure of inbreeding and population decline in our two
study species.
No hay comentarios:
Publicar un comentario