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Home NEWS Science News Biology

Bee dispersal ability may influence conservation measures

Bioengineer by Bioengineer
February 7, 2019
in Biology
Reading Time: 2 mins read
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Credit: Barbara Driscoll


The abilities of various bee species to disperse influences the pattern of their population’s genetic structure, which, in turn, can constrain how they respond to environmental change, as reported by an international team of researchers.

“Bees are declining around the world, which is a problem because these pollinators are critically important, both ecologically and economically,” said Margarita López-Uribe, assistant professor of entomology, Penn State. “Our study has major implications for bee species conservation. For example, the ability of a species to disperse farther can enable that species to move to suitable areas under scenarios of climate change.”

The team reviewed all pre-existing studies that had measured bee population genetic structure. The researchers related this population genetic structure to the bees’ body size with a goal of determining whether this relationship would provide an indication of how susceptible bees are to barriers to their movement, such as the destruction of habitat due to deforestation or urbanization.

The team’s results appeare online in February in Molecular Ecology.

According to López-Uribe, population genetic structure describes patterns of genetic diversity — the basis of a population’s ability to evolve and adapt to new conditions — among populations within a species. Lower population genetic structure suggests that the genetic diversity of a species is equally distributed across its geographic range, and higher population genetic structure suggests that the genetic diversity is clustered or subdivided into groups.

In addition to body size, López-Uribe and her colleagues also examined the breadth of the bees’ diets and their social behavior — whether they are solitary species or work and live together as part of a group. The team focused on studies that used microsatellite molecular markers — unique bits of DNA that are prone to mutations and allow scientists to quantify genetic diversity in a species and examine the pattern of that species’ population genetic structure.

The scientists found that bee species with larger body sizes and social behaviors exhibit patterns of lower population genetic structure than bees with smaller bodies and solitary behaviors. The team did not find diet specialization to influence the population genetic structure of bees.

“Dispersal is hard to study in small insects,” said López-Uribe. “Our study is the first to link bee body size and sociality with population genetic structure, which means we can predict which species may be at risk of local extinction based on these traits.”

Antonella Soro, research assistant, Martin-Luther University of Halle-Wittenberg, Germany, noted that the study also has important implications for future research.

“It confirms body size as a master trait whose variation and genetic basis should be the focus of further inquiry if we want to understand how bees adapt to a rapidly changing environment,” said Soro.

###

Other authors on the paper include Shalene Jha, associate professor, University of Texas at Austin.

The Army Research Office and the National Science Foundation supported this research.

Media Contact
Sara LaJeunesse
[email protected]
814-865-9481

Tags: BiologyEcology/EnvironmentEntomology
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