NDLI: Population genetics of orchid bees in a fragmented tropical landscape

Content Provider	Springer Nature Link
Author	Suni, Sevan S. Brosi, Berry J.
Copyright Year	2011
Abstract	The prospects for persistence of bees living in fragmented landscapes is a topic of considerable interest due to bees’ importance as pollinators of agricultural crops and wild plants, coupled with the ubiquity of native habitat loss and evidence that bees may be declining worldwide. Population persistence in fragmented areas depends on dispersal potential and maintenance of gene flow among fragments of habitat. Here we used population genetic techniques to characterize, for two equally abundant orchid bee species that differ in their physiology and ecology, levels of genetic differentiation among fragments of tropical forest in southeastern Costa Rica in a ~200 km2 landscape. We measured population differentiation with ϕPT (an analogue to the traditional summary statistic Fst), as well as two measures that may more accurately reflect the level of differentiation when highly variable loci are used: G’st and Dest. We also calculated pairwise genetic distances among individuals and conducted Mantel tests to test the correlation of genetic and geographic distance, for each species. We found strong differences in genetic structure between the species. Contrary to our expectations, each measure of genetic structure revealed that the larger-bodied species, Eulaema bombiformis, had higher levels of differentiation than the smaller species, Euglossa championi. Furthermore, for Eulaema bombiformis there was a significant positive correlation of genetic and geographic distance while for Euglossa championi there was no significant positive correlation. Our results demonstrate that bee species can have strikingly different levels of gene flow in fragmented habitats, and that body size may not always act as a useful proxy for dispersal, even in closely related taxa.
Starting Page	323
Ending Page	332
Page Count	10
File Format	PDF
ISSN	15660621
Journal	Conservation Genetics
Volume Number	13
Issue Number	2
e-ISSN	15729737
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-11-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Orchid bee Euglossine Genetic differentiation Landscape Dispersal Fragmentation Plant Sciences Animal Anatomy / Morphology / Histology Evolutionary Biology Conservation Biology/Ecology
Content Type	Text
Resource Type	Article
Subject	Genetics Ecology, Evolution, Behavior and Systematics

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