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Filtering by: Alternative title ssim PNW 347 Committee Member Doescher, Paul Decade 1990-1999

Understory vegetation response and nitrogen cycling following cutting of western juniper

Creator:

Bates, Jonathan D.

Abstract:

Since the late 1880's western juniper has expanded in range and increased in density in sagebrush-bunchgrass, riparian, and forested plant communities of the Pacific Northwest. Succession to western juniper woodland has been shown to reduce the productivity and diversity of the understory component, result in concentration of soil nutrients beneath...

Resource Type:

Dissertation
Vegetation composition and response to fire of native Willamette Valley wetland prairies

Creator:

Pendergrass, Kathy L. (Connelly)

Abstract:

Fires set by Native Americans were important in shaping and maintaining Willamette Valley prairie plant communities. With fire exclusion after Euro-American settlement in the 1840's, composition of the remaining prairies shifted toward shrub and tree dominance with a concomitant decline in endemic prairie plant populations. I hypothesize that by restoring...

Resource Type:

Masters Thesis

Full Text:

; Geoflora in PNW; Loss of species dependent on Late Pliocene-increasing ppt. and decreasing summer