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

摘要: 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 natural habitat isolation has affected genetic diversity diploid male production (DMP) two orchid bee species, Euglossa dilemma viridissima, we collected genotyped 1686 males at five microsatellite loci tested for differences allelic richness, heterozygosity DMP across three different types land use (natural, urban) between mainland island populations Yucatan Peninsula Mexico. We also investigated impact geographic on gene flow. E. viridissima seemed be particularly resilient habitat; locations with human impact, did not find reduced diversity, generally showed very little population structure. Only islands show significantly diversity. Even after accounting putative null alleles, was low (0.2–1.3%) all sampling sites, including islands. therefore suggest is an insensitive measure inbreeding decline our study species.