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Bee Diversity Keeps Colonies Healthy
The most diverse bee communities have the lowest levels of three common viral pathogens, according to a new analysis of thousands of native and nonnative bees.
Researchers netted and trapped more than 4,000 bees from 60 species at winter squash farms across the state of Michigan, where both managed honey bee colonies and wild native bees pollinate the squash flowers. All but one species
The most diverse bee communities have the lowest levels of three common viral pathogens, according to a new analysis of thousands of native and nonnative bees.
Researchers netted and trapped more than 4,000 bees from 60 species at winter squash farms across the state of Michigan, where both managed honey bee colonies and wild native bees pollinate the squash flowers. All but one species
Apis mellifera, the common European honey bee are native bees. The number of bee species found at each farm ranged from seven to 49.
Consistently, lower virus levels were strongly linked to greater species richness among the local bee communities, according to the study in the journal
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IMAGE: The intermountain bunchgrass prairie at the National Bison Range, Montana, USA at one of the study areas. view more
Credit: Gary Belovsky
Over 40 years of monitoring, an endangered bunchgrass prairie became hotter, drier and more susceptible to fire annually but dramatic seasonal changes (not annual climate trends) seem to be driving the biggest changes in plant production, composition, and summer senescence. Gary Belovsky and Jennifer Slade of The University of Notre Dame, Indiana, present these findings in the open-access journal
PLOS ONE on December 23.
Intermountain bunchgrass prairie is one of North America s most endangered ecosystems, now covering less than 1 percent of the area it once did. Over the past century, bunchgrass prairies have become warmer and drier, and human-driven climate change is expected to continue that trend, with potential impacts on bunchgrass ecosystems. However, bunchgrass is often overlooked in studies of grasslands.