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- Dr. Jim Rivers, College of Forestry, OSU
Can trees be the bees knees? The emergence of pollinator research in - - PowerPoint PPT Presentation
Can trees be the bees knees? The emergence of pollinator research in - - PowerPoint PPT Presentation
Can trees be the bees knees? The emergence of pollinator research in managed conifer forests Dr. Jim Rivers, College of Forestry, OSU Three focal points for this morning The global importance of pollinators Ecology and natural history of native
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A refresher on animal‐mediated pollination
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pollen housed in anthers nectar housed in nectary
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OperationBee.com
>300,000 species of flowering plants benefit from pollinators ~75% of crops benefit from pollinators
Pollinators impact natural ecosystems and global food security
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Kevin Frayer/Getty Images
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8 bee species now listed under the ESA
Johanna James‐Heinz
Recent actions to protect pollinators and their habitats
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Ecology and natural history
- f native bees
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OR Dept. Agriculture
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There are >500 named species of native bees in Oregon
OR Dept. Agriculture
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Mining bees (Andrena spp.) Social nesters Nests in cavities (hives) Adults active year‐round Floral generalists Solitary nesters Nests in the ground Adults active 3‐6 weeks Many floral specialists Honey bee (Apis mellifera)
The honey bee is atypical when it comes to bees
OR Dept. Agriculture
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Arctic lupine (Lupinus latifolius)
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Trailing snowberry (Symphoricarpos hesperius)
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Salal (Gaultheria shallon)
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Mechanical disturbance can provide access to soil for ground‐nesting bees
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Cavities provide nesting sites for many bee species
Blue orchard bee (Osmia lignaria)
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Emerging pollinator research in managed conifer forests
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How do natural disturbances structure pollinator communities?
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4 years post‐harvest
How do forest management practices influence pollinators?
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Scott Harris
15 years post‐harvest
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Years since harvest
2 4 6 8 10 12 14 16
Bee abundance
100 200 300 400 500 600
Years since harvest
2 4 6 8 10 12 14 16
Bee species richness
5 10 15 20 25 30 35
Bee numbers and species decrease with time since harvest during the early‐successional period
Number of bees Number of bee species
Rivers and Betts, unpublished data
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How does herbicide application intensity alter pollinator communities?
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Management intensity
Control Moderate
Pollinator species richness
4 6 8 10 12 14 16 18 20 22 24
Management intensity
Control Moderate
Pollinator abundance
10 20 30 40 50 60
Number of pollinators Number of pollinator species
Kormann et al., unpublished data
Pollinator number and species decrease with increased herbicide application intensity
Herbicide intensity Herbicide intensity
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Do bees from early‐successional forests pollinate adjacent agricultural crops?
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The global importance of pollinators They are critical for healthy (forest) ecosystems Ecology and natural history of native bees Bees excel at pollination via foraging activities Emerging research in managed conifer forests Many new and ongoing studies…stay tuned!
Three focal points for this morning
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Funding
Bureau of Land Management; USDA AFRI; Mealey/Boise Cascade/Boone and Crockett/Noble Endowment Fun at Oregon State University; College Forests at Oregon State University; Fish and Wildlife in Managed Forests Program at Oregon State University; Native Plant Society of Oregon; Katherine Bisbee II Fund of the Oregon Community Foundation
Logistical support
- N. Meehan, S. Holub, G. Johnson, K. Emmons, N. Garlick, I. Lively, T. Squires, K. Wright,
Weyerhaeuser, Hancock, Oregon Dept. Forestry Matt Betts Andy Moldenke Sara Galbraith Jim Cane
Many thanks to…
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http://blogs.oregonstate.edu/beeproject/