Schwantes wild bees living on the edge
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Transcript of Schwantes wild bees living on the edge
Wild Bees Living on the Edge Collin Schwantes, Adrian Carper and Mary Jamieson
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Bee diversity
Natural History
Solitary spp. > 95%
Natural History
Majority of Bees are GROUND nesNng
Natural History
Pollen is protein Nectar is carbohydrate
Scale
Greenleaf et al. 2007
Bee Body size is related to foraging distance Bigger bees forage farther A majority of bee species are foraging about 1km
Vulnerable to Land Use Change
• Solitary • Soil NesNng • Poor Dispersers • Dependent on Specific Flowers
Land Use Change
Land Use Change
Historically, grasslands are the most converted habitat type
Land Use Change Spatially explicit land-use and land-cover
scenarios for the Great Plains of the United States
Sohl et al. 2012
Roadside Edge
QuesNon
1) Characterize the Bee Community
2) Characterize the Landscape 3) Examine relaNonship between amount of Roadside edge and Bee Community
Hypothesis: Bee communiNes will differ based on the amount of edge habitat in the landscape.
Site SelecNon
Site SelecNon
Characterizing the Landscape
• Reclassify and extract data from CDL
• Delineate and buffer roads, extract areas
Crop Land Data Layer
ExtracNng Data from the CDL
• Used 2013 CDL • Reclassified into 6 class
• Extracted Values to 2km polygon
ExtracNng Roadside Edge
• Buffered TIGER road lines to cover road
• Buffered TIGER road lines to cover edge
• Erased road polygons
• Extracted Area to 2km circle
ExtracNng Roadside Edge
Roads Buffer Roads Erase
Buffer Central Point extract edge area in buffer
intersect edge with buffer
Characterizing the Landscape
Characterizing the Landscape
Characterize the Bee Community
Characterizing the Bees
Characterizing the Bees
Characterizing the Bees
p < 0.001 p < 0.001
Characterizing the Bees
Characterizing the Bees
Red = High Diversity Blue = Low diversity
Spline based interpolaNon
Characterizing Bee CommuniNes
Characterizing Bee Community
= Helianthus pe-olaris feeders
Results Roadside Edge
High
Low
stress = 8.52 X axis explains 44% of variaNon, Y axis explains 33%
Conclusions
• Roadside edges airact large numbers bees from diverse genera
• Sunflower feeding genera dominate bee communiNes
• CommuniNes diverge when liile roadside edge is in the landscape
Future direcNons
• Raster based extracNons of edge habitat with species level taxonomic resoluNon
• Patch Size ~ how big is the grassland that our site is situated in?
• Combine local and landscape factors
References DeFries, R., Foley, J., & Asner, G. (2004). Land-‐Use Choices : Balancing Human Needs and Ecosystem FuncNon Author. Fron-ers in Ecology and the Environment, 2(5), 249–257. Retrieved from hip://www.jstor.org/stable/3868265 Greenleaf, S. S., Williams, N. M., Winfree, R., & Kremen, C. (2007). Bee foraging ranges and their relaNonship to body size. Oecologia, 153(3), 589–96. doi:10.1007/s00442-‐007-‐0752-‐9 Hurd, P. D., Laberge, W. E., & Linsley, E. G. (1980). Prinicipal Sunflower Bees of North America with Emphasis on the Southwestern United States (Hymenopter: Apoidea). Smithsonian Contribu-ons to Zoology, (310). Kremen, C., Williams, N. M., & Thorp, R. W. (2002). Crop pollinaNon from naNve bees at risk from agricultural intensificaNon. Proceedings of the Na-onal Academy of Sciences of the United States of America, 99(26), 16812–6. doi:10.1073/pnas.262413599 Leibold, M., Economo, E., & Peres-‐Neto, P. (2010). Metacommunity phylogeneNcs: separaNng the roles of environmental filters and historical biogeography. Ecology LeHers, 13(10), 1290–9. doi:10.1111/j.1461-‐0248.2010.01523.x Marshall, E., & Moonen, A. (2002). Field margins in northern Europe: their funcNons and interacNons with agriculture. Agriculture, Ecosystems & Environment, 89, 5–21. Retrieved from hip://www.sciencedirect.com/science/arNcle/pii/S0167880901003152 Scoi, V., Ascher, J., Griswold, T., & Nufio, C. (2011). The Bees of Colorado, (23). Retrieved from hip://cumuseum.colorado.edu/sites/default/files/The Bees of Colorado.pdf Sipes, S., & Tepedino, V. (2005). Pollen-‐host specificity and evoluNonary paierns of host switching in a clade of specialist bees (Apoidea: Diadasia). Biological Journal of the Linnean Society, 86, 487–505. Retrieved from hip://onlinelibrary.wiley.com/doi/10.1111/j.1095-‐8312.2005.00544.x/full Sohl, T. L., Sleeter, B. M., Sayler, K. L., Bouchard, M. A., Reker, R. R., Bennei, S. L., ... & Zhu, Z. (2012). SpaNally explicit land-‐use and land-‐cover scenarios for the Great Plains of the United States. Agriculture, Ecosystems & Environment, 153, 1-‐15. Williams, N., & Kremen, C. (2007). Resource distribuNons among habitats determine solitary bee offspring producNon in a mosaic landscape. Ecological Applica-ons, 17(3), 910–921. Retrieved from hip://www.esajournals.org/doi/abs/10.1890/06-‐0269
Acknowledgements
Photo Credit: J. Travis Bildalh Sam Droege Collin Schwantes
Funding and InsNtuNons: United States Department of Agriculture GIS Colorado University of Colorado Boulder University of Wisconsin Madison Colorado State University
Collaborators: Mary Jamieson Adrian Carper Stacey Edriss Bernadeie Kuhn Deane Bowers Andrew Norton
Acknowledgements: Virginia Scoi Amber Churchill Karen Wright QDT Group at CU Boulder Field and Laboratory Technicians
QuesNons?