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The antelope-brush ecosystem of British Columbia’s South Okanagan region is one of the 4 most endangered ecosystems in Canada. Approximately 9% of this ecosystem remains relatively undisturbed. Widespread livestock grazing is 1 of the major disturbances to this ecosystem’s community of arthropods, including ants. The effects of grazing on ant biodiversity are relatively unknown, partly owing to the lack of research on the ant fauna of British Columbia. The objective of this study is to compile an up-to-date list of ant species within this antelope-brush ecosystem, and to determine the effects of grazing on ant biodiversity. Approximately 95,000 ants were collected by pitfall trapping at 10 study sites over a 2-year study period (May 1994–October 1995). Each study site was classified as ungrazed, moderately grazed, or heavily grazed. Average catch per trap over this collection period was highest in the heavily grazed sites. Identification of ants from 1 collection period (June–July 1995) shows that the highest
Heron, Jennifer. 1999. The Effect of Grazing on Ant Biodiversity in the South Okanagan (in Proc. Conference Biology & Management of Species and Habitats at Risk). Ministry of Environment, Lands and Parks; University College of the Cariboo. Conference Biology & ManagementProceedings
Other Identifier: University College of the Cariboo
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