NDLI: Habitat type plays a greater role than livestock grazing in structuring shrubsteppe plant

Content Provider	Springer Nature Link
Author	Elwell, Sherri L. Griswold, Terry Elle, Elizabeth
Copyright Year	2016
Abstract	Livestock grazing is a widespread grassland disturbance and can negatively impact biodiversity. Pollinators constitute a vital component of grassland ecosystems, but the impact of grazing on pollinator diversity has seldom been evaluated in North America. We assessed vegetation structure, and pollinator and flowering plant abundance, richness, diversity, and community composition in four pairs of spring-grazed/ungrazed sites in south-central British Columbia, Canada. We also investigated whether pollinator or floral communities differed between the two threatened shrubsteppe habitat types we sampled—antelope-brush and big sagebrush shrubsteppe. Pan-trapping surveys captured 5907 bees, flies, beetles, wasps and butterflies constituting 253 species. We found that the percent cover of shrubs and bare soil increased with grazing, while the height of grasses and forbs decreased. In contrast, pollinator and flowering plant abundance, richness, diversity, and community composition were not significantly affected by grazing. Flowering plant and pollinator community composition did differ significantly between shrubsteppe habitats. Our results indicate that grasslands in North America, when managed responsibly, can maintain pollinator and flowering plant diversity under grazing pressure. The continued effort of land managers to balance ecological integrity and economic viability will be important for the conservation of grassland pollination systems.
Starting Page	515
Ending Page	525
Page Count	11
File Format	PDF
ISSN	1366638X
Journal	Journal of Insect Conservation
Volume Number	20
Issue Number	3
e-ISSN	15729753
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-06-18
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biodiversity Community composition Insect conservation Livestock grazing Pollinators Shrubsteppe Entomology Conservation Biology/Ecology Animal Ecology Life Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Animal Science and Zoology Nature and Landscape Conservation Insect Science

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