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Local-scale and foraging-scale habit...

Greenleaf, Sarah Ann Smith.

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Local-scale and foraging-scale habitats affect bee community abundance, species richness, and pollination services in northern California.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Local-scale and foraging-scale habitats affect bee community abundance, species richness, and pollination services in northern California./
作者:	Greenleaf, Sarah Ann Smith.
面頁冊數:	98 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-12, Section: B, page: 6151.
Contained By:	Dissertation Abstracts International65-12B.
標題:	Biology, Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3156040
ISBN:	9780496166336

Local-scale and foraging-scale habitats affect bee community abundance, species richness, and pollination services in northern California.
Greenleaf, Sarah Ann Smith.

Local-scale and foraging-scale habitats affect bee community abundance, species richness, and pollination services in northern California. - 98 p.

Source: Dissertation Abstracts International, Volume: 65-12, Section: B, page: 6151.

Thesis (Ph.D.)--Princeton University, 2005.

As pollinators, bees are vital to the reproduction of most flowering plants and to the production of 15--30% of the United States' human food supply. The world's most important crop pollinator is the European honey bee, a domesticated species. With worldwide declines in honey bees and possible declines in wild bees, research has begun to investigate the ecological processes that are important for delivering crop pollination and to document how wild bees and their pollination services are affected by changing land use. This dissertation focuses on (1) the effects of local-scale and landscape-scale habitat variation on wild bee communities and (2) the role of wild bee community abundance and species richness in delivering pollination services.

ISBN: 9780496166336Subjects--Topical Terms:

1017726
Biology, Ecology.

Local-scale and foraging-scale habitats affect bee community abundance, species richness, and pollination services in northern California.
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245 1 0 $a Local-scale and foraging-scale habitats affect bee community abundance, species richness, and pollination services in northern California.
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500 $a Source: Dissertation Abstracts International, Volume: 65-12, Section: B, page: 6151.
500 $a Adviser: Claire Kremen.
502 $a Thesis (Ph.D.)--Princeton University, 2005.
520 $a As pollinators, bees are vital to the reproduction of most flowering plants and to the production of 15--30% of the United States' human food supply. The world's most important crop pollinator is the European honey bee, a domesticated species. With worldwide declines in honey bees and possible declines in wild bees, research has begun to investigate the ecological processes that are important for delivering crop pollination and to document how wild bees and their pollination services are affected by changing land use. This dissertation focuses on (1) the effects of local-scale and landscape-scale habitat variation on wild bee communities and (2) the role of wild bee community abundance and species richness in delivering pollination services.
520 $a I carried out both descriptive and experimental research across agricultural and wild habitats in Northern California. I found that when more wild habitat was within foraging range, bee community abundance and species richness on sunflower crops increased. Experimentally placed bumble bee colonies produced more workers when more wild habitat was within their foraging range. An interaction between local and foraging scale habitat was associated with an increase in maximum colony weight.
520 $a I found that species richness is important for maintaining pollination services. First, certain bee species are highly efficient pollinators for some but not for other crops. Thus, to maintain pollination services for various crops, a species-rich bee community is beneficial. Second, synergism exists between bee species. Wild bees altered the foraging patterns of honey bees, making them substantially more efficient pollinators than when foraging alone. Third, bees are lost nonrandomly from the community, with the two most efficient direct sunflower pollinators being among the most extinction-prone species. Fourth, community abundance and species richness are correlated. Whether those two variables are driven by a third factor, such as habitat quality, or whether species richness covaries directly with community abundance, diminished species richness indicates depressed pollination services.
520 $a I suggest actions for maintaining pollination services. Effective approaches may be preserving wild habitat across the landscape, reintroducing locally extinct bees, and improving on-farm habit.
590 $a School code: 0181.
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