reference : Historical changes in northeastern US bee pollinators related to shared ecological traits

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Bibliographic fields
reftype Journal Article
Abstract Pollinators such as bees are essential to the functioning of terrestrial ecosystems. However, despite concerns about a global pollinator crisis, long-term data on the status of bee species are limited. We present a long-term study of relative rates of change for an entire regional bee fauna in the northeastern United States, based on >30,000 museum records representing 438 species. Over a 140-y period, aggregate native species richness weakly decreased, but richness declines were significant only for the genus Bombus. Of 187 native species analyzed individually, only three declined steeply, all of these in the genus Bombus. However, there were large shifts in community composition, as indicated by 56% of species showing significant changes in relative abundance over time. Traits associated with a declining relative abundance include small dietary and phenological breadth and large body size. In addition, species with lower latitudinal range boundaries are increasing in relative abundance, a finding that may represent a response to climate change. We show that despite marked increases in human population density and large changes in anthropogenic land use, aggregate native species richness declines were modest outside of the genus Bombus. At the same time, we find that certain ecological traits are associated with declines in relative abundance. These results should help target conservation efforts focused on maintaining native bee abundance and diversity and therefore the important ecosystems services that they provide.
Author Bartomeus, I.; Ascher, J. S.; Gibbs, J.; Danforth, B. N.; Wagner, D. L.; Hedtke, S. M.; Winfree, R.
DOI 10.1073/pnas.1218503110
Date Mar 19
EPub Date 2013/03/15
ISSN 1091-6490 (Electronic) 0027-8424 (Linking)
Issue 12
Journal Proceedings of the National Academy of Sciences of the United States of America
Keywords Adaptation, Physiological; Animals; Bees/ physiology; Biodiversity; Humans; Pollination; Population Dynamics; United States
Language eng
Name of Database
PMCID 3606985
Pages 4656-4660
Title Historical changes in northeastern US bee pollinators related to shared ecological traits
Volume 110
Year 2013
Bibliographic identifiers
_record_number 4106
_uuid 7cde5513-8e00-4645-80ec-d3c82b9f8984