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Changes in composition and structure of a wild bee community and plant-pollinator interactions in South-Central Ontario over a forty-nine year period

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dc.contributor.advisor Raine, Nigel
dc.contributor.author Rubens, Claire
dc.date.accessioned 2019-09-30T19:58:19Z
dc.date.available 2019-09-30T19:58:19Z
dc.date.copyright 2019-09
dc.date.created 2019-09-03
dc.date.issued 2019-09-30
dc.identifier.uri http://hdl.handle.net/10214/17491
dc.description.abstract Wild pollinators provide important ecosystem services for both agricultural and natural ecosystems. While there is evidence of global pollinator declines, more long-term studies are needed to assess population trends, and the potential impacts of environmental stress factors such as land-use intensification and climate change. This is the first study to examine long-term changes in a wild bee community in Canada. Wild bee abundance, species richness, diversity and evenness were compared across three sampling periods (1968-1969, 2002-03, and 2016-17) in Caledon, Ontario over 49 years. Despite decreases in wild bee abundance since 2002-03, the diversity, evenness and richness increased over time. Extensive restructuring (including loss and frequency changes) of plant-pollinator interactions from 2002-03 to 2016-17 appeared not to affect network resilience. While local trends in land-use patterns did not predict changes in this wild bee community, climatic changes in temperature and snowfall correlated with wild bee abundance at the site. en_US
dc.description.sponsorship This work was supported by funds from the Natural Sciences and Engineering Research Council (NSERC Discovery grant 2015-06783), the Food from Thought: Agricultural Systems for a Healthy Planet Initiative, by the Canada First Research Excellent Fund (grant 000054) and the W. Garfield Weston Foundation awarded to Dr. Raine. en_US
dc.language.iso en en_US
dc.subject bees en_US
dc.subject wild bees en_US
dc.subject pollinators en_US
dc.subject pollination en_US
dc.subject long-term study en_US
dc.subject climate change en_US
dc.subject habitat en_US
dc.subject biodiversity en_US
dc.subject community en_US
dc.subject conservation en_US
dc.subject plant-pollinator interactions en_US
dc.subject ecosystem en_US
dc.title Changes in composition and structure of a wild bee community and plant-pollinator interactions in South-Central Ontario over a forty-nine year period en_US
dc.type Thesis en_US
dc.degree.programme Environmental Sciences en_US
dc.degree.name Master of Science en_US
dc.degree.department School of Environmental Sciences en_US
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