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Keyword: Geographic variation

International Limber Pine Provenance Study (ILPPS): Rocky Mountain adaptive variation experiment

Projects Posted on: August 14, 2017
Limber pine is threatened by climate change, white pine blister, dwarf mistletoe, and mountain pine beetle. Scientists have planted limber pine in two contrasting environments to assess adaptive trait variation and plasticity, as well as climate interactions. Research such as the International Limber Pine Provenance Study (ILPPS) will support proactive managment to keep limber pine populations sustainable and prevent limber pine from following the same trajectory as whitebark pine.

Geographic variation in foraging ecologies of breeding and nonbreeding birds in oak woodlands

Publications Posted on: June 16, 2016
I studied geographic variation in the foraging ecology of four breeding and four non breeding species in three oak (Quercus spp.) woodlands of California. Variations were evident for all species. Variations in tree-species use, foraging tactics, substrates, and behaviors were species-specific.

Twenty-two year results of a Scots pine (Pinus sylvestris L.) provenance test in North Dakota

Publications Posted on: May 12, 2016
A provenance test of 49 seed sources of Scots pine (Pinus sylvestris L.) from eastern Europe, Russia, and Siberia was established in two plantations in north-central North Dakota. After 22 years, trees from seed sources within the region bounded by 20° to 57° east longitude and 50° to 58° north latitude were taller, and larger in diameter, and had denser crown and greener winter foliage.

Data product containing 16-year tree heights, survival, and genetic variation for "Genetic Variation in Blue Spruce: A Test of Populations in Nebraska"

Datasets Posted on: March 27, 2015
In the fall of 1969 seeds were collected from more than 400 trees throughout the natural range of blue spruce (Wyoming, Utah, Colorado, Arizona, and New Mexico). These seeds were sown in a nursery in Michigan in 1970. In 1973 over 800 of those seedlings were planted in a plantation in Horning, Nebraska. This dataset contains annual tree heights of surviving trees from 1973 to 1988.

Scotch pine for the northern Great Plains

Publications Posted on: September 29, 2006
A provenance test of 49 origins of Scotch pine (Pinus sylvestris L.) from eastern Europe, Russia, and Siberia was established at three locations in North Dakota and one in Nebraska. After 10 years (7 in Nebraska), trees from 50º to 55º latitude and 20º to 40º longitude survived best, were taller, and had greener winter foliage. Several provenances appear to be well suited for planting in shelterbelts and for Christmas tree culture.