Undergraduate Thesis Or Project

 

McKenney_2010_Seminar.pdf Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/undergraduate_thesis_or_projects/6m311r00m

Descriptions

Attribute NameValues
Creator
Abstract
  • Farmers rely almost exclusively on the imported European honeybee (Apis mellifera L.) for fruit and vegetable crop pollination services. The recent decline in honeybee health has underscored the danger of relying on a single species to provide vital services. Increasing pollinator biodiversity with native bees may provide biological insurance against the decline of any particular species. By examining cropping systems, it is possible to determine which native bees are providing pollination services and then augment habitat to increase their numbers or attempt domestication. In this study, we examined the native bee populations in the cranberry growing area of southern coastal Oregon in order to determine if native bees play a significant role in cranberry pollination. This two-year study surveyed four farms across a 22 km north-south gradient. At least 27 bee species were observed during cranberry bloom (mid-May to late June), of which five were observed foraging on the cranberry flowers. The imported European honeybee and bumble bees (Bombus spp.) comprised 99.7% of foragers. While honeybees and bumble bees foraged at comparable wind speeds, Bombus spp. foraged at significantly lower average temperatures (P<0.0001). Both honeybees and bumble bees collected cranberry pollen while foraging, but 37.2% of honeybees were observed nectar-robbing (collecting nectar but no pollen) versus only 11.3% of bumble bees. Bumble bees in general, and the western yellow-faced bumble bee (Bombus vosnesenskii Radoszkowski) in particular, are abundant native pollinators of cranberry, and may provide adequate pollination for small Oregon cranberry farms. Conservation of bumble bee habitat and development of managed colonies will help maintain pollination services.
Keyword
Rights Statement
Additional Information
  • description.provenance : Made available in DSpace on 2010-06-09T16:26:49Z (GMT). No. of bitstreams: 3McKenney_2010_Seminar.pdf: 63497891 bytes, checksum: a4c30e6979fd9f6f00f5e82b7a097050 (MD5)McKenney_Thesis_part2v04-b.pdf: 2888180 bytes, checksum: e4d756806bed5dff6c0f2e2f081af4aa (MD5)McKenney_Thesis_part 1v04-a.pdf: 51279 bytes, checksum: 3e181077610065e2457beb06b04b7b13 (MD5)
  • description.provenance : Submitted by Wanda Crannell (crannelw@hort.oregonstate.edu) on 2010-06-08T21:42:10ZNo. of bitstreams: 3McKenney_2010_Seminar.pdf: 63497891 bytes, checksum: a4c30e6979fd9f6f00f5e82b7a097050 (MD5)McKenney_Thesis_part2v04-b.pdf: 2888180 bytes, checksum: e4d756806bed5dff6c0f2e2f081af4aa (MD5)McKenney_Thesis_part 1v04-a.pdf: 51279 bytes, checksum: 3e181077610065e2457beb06b04b7b13 (MD5)
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2010-06-09T16:26:49Z (GMT) No. of bitstreams: 3McKenney_2010_Seminar.pdf: 63497891 bytes, checksum: a4c30e6979fd9f6f00f5e82b7a097050 (MD5)McKenney_Thesis_part2v04-b.pdf: 2888180 bytes, checksum: e4d756806bed5dff6c0f2e2f081af4aa (MD5)McKenney_Thesis_part 1v04-a.pdf: 51279 bytes, checksum: 3e181077610065e2457beb06b04b7b13 (MD5)

Relationships

Parents:

Items