Index Catalog // ScholarsArchive@OSU

Creator:: Condon, Lea A. and Pyke, David A.
Abstract:: Shrubs, bunchgrasses and biological soil crusts (biocrusts) are believed to contribute to site resistance to plant invasions in the presence of cattle grazing. Although fire is a concomitant disturbance with grazing, little is known regarding their combined impacts on invasion resistance. We are the first to date to test the...
Resource Type:: Article
Full Text:: on Shrub, Bunchgrass and Biocrust Communities in the Great Basin (USA) Lea A. Condon1,2* and David

Creator:: Wijayratne, Upekala C. and Pyke, David A.
Abstract:: • Premise of the study: Seed longevity and persistence in soil seed banks may be especially important for population persistence in ecosystems where opportunities for seedling establishment and disturbance are unpredictable. The fire regime, an important driver of population dynamics in sagebrush steppe ecosystems, has been altered by exotic annual...
Resource Type:: Article
Full Text:: . WIJAYRATNE 2,3,4 AND DAVID A. PYKE 2 2 U.S. Geological Survey, Forest and

Creator:: Reisner, Michael D., Doescher, Paul S., and Pyke, David A.
Abstract:: Questions: (1) What combinations of overlapping water and heat stress and herbivory disturbance gradients are associated with shifts in interactions between Artemisia tridentata subsp. wyomingensis (Artemisia) and herbaceous beneficiary species? (2) Do interactions between Artemisia and beneficiaries shift from competition to facilitation with increasing stress-disturbance where facilitation and competition are...
Full Text:: (concentration of abundance into a particular community). Indicator values (IV) are the maximum of 100*RF*RA

Creator:: Reisner, Michael D., Doescher, Paul S., and Pyke, David A.
Abstract:: Questions: (1) What combinations of overlapping water and heat stress and herbivory disturbance gradients are associated with shifts in interactions between Artemisia tridentata subsp. wyomingensis (Artemisia) and herbaceous beneficiary species? (2) Do interactions between Artemisia and beneficiaries shift from competition to facilitation with increasing stress-disturbance where facilitation and competition are...
Full Text:: -level cover) and gradients. Abundance measures the location of a species relative to its ecological

Creator:: Reisner, Michael D., Doescher, Paul S., and Pyke, David A.
Abstract:: Questions: (1) What combinations of overlapping water and heat stress and herbivory disturbance gradients are associated with shifts in interactions between Artemisia tridentata subsp. wyomingensis (Artemisia) and herbaceous beneficiary species? (2) Do interactions between Artemisia and beneficiaries shift from competition to facilitation with increasing stress-disturbance where facilitation and competition are...
Full Text:: beneficiary species 2 Plot-level cover (community composition) was used to estimate the location of a focal

Creator:: Reisner, Michael D., Doescher, Paul S., and Pyke, David A.
Abstract:: Questions: (1) What combinations of overlapping water and heat stress and herbivory disturbance gradients are associated with shifts in interactions between Artemisia tridentata subsp. wyomingensis (Artemisia) and herbaceous beneficiary species? (2) Do interactions between Artemisia and beneficiaries shift from competition to facilitation with increasing stress-disturbance where facilitation and competition are...
Full Text:: heat n/a 0.32 0.95 0.38 0.18 Herbivory Distance from nearest water source distance m 100 3560 -0.38

Creator:: Reisner, Michael D., Doescher, Paul S., and Pyke, David A.
Abstract:: Questions: (1) What combinations of overlapping water and heat stress and herbivory disturbance gradients are associated with shifts in interactions between Artemisia tridentata subsp. wyomingensis (Artemisia) and herbaceous beneficiary species? (2) Do interactions between Artemisia and beneficiaries shift from competition to facilitation with increasing stress-disturbance where facilitation and competition are...
Full Text:: of communities. Levels of heat (A), herbivory (B), water (C), and cumulative stress (D) for the

Creator:: Reisner, Michael D., Doescher, Paul S., and Pyke, David A.
Abstract:: Questions: (1) What combinations of overlapping water and heat stress and herbivory disturbance gradients are associated with shifts in interactions between Artemisia tridentata subsp. wyomingensis (Artemisia) and herbaceous beneficiary species? (2) Do interactions between Artemisia and beneficiaries shift from competition to facilitation with increasing stress-disturbance where facilitation and competition are...

Creator:: Reisner, Michael D., Doescher, Paul S., and Pyke, David A.
Abstract:: Questions: (1) What combinations of overlapping water and heat stress and herbivory disturbance gradients are associated with shifts in interactions between Artemisia tridentata subsp. wyomingensis (Artemisia) and herbaceous beneficiary species? (2) Do interactions between Artemisia and beneficiaries shift from competition to facilitation with increasing stress-disturbance where facilitation and competition are...
Full Text:: A. thurberianum the dominate bunchgrasses. 2. Sandy Loam 8-10PZ (203 to 254 mm) with H. comata

Creator:: Reisner, Michael D., Doescher, Paul S., and Pyke, David A.
Abstract:: Questions: (1) What combinations of overlapping water and heat stress and herbivory disturbance gradients are associated with shifts in interactions between Artemisia tridentata subsp. wyomingensis (Artemisia) and herbaceous beneficiary species? (2) Do interactions between Artemisia and beneficiaries shift from competition to facilitation with increasing stress-disturbance where facilitation and competition are...
Full Text:: . Competition as a barrier to establishment of a native perennial grass (Elymus elymoides) in alien annual

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