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Fire and Rangelands

Displaying 41 - 49 of 49

Predicting the Occurrence of Downy Brome (Bromus tectorum) in Central Oregon

Year of Publication
2012
Publication Type

Where the nonnative annual grass downy brome proliferates, it has changed ecosystem processes, such as nutrient, energy, and water cycles; successional pathways; and fire regimes. The objective of this study was to develop a model that predicts the presence of downy brome in Central Oregon and to test whether high presence correlates with greater cover. Understory data from the U.S.

Trajectories of change in sagebrush steppe vegetation communities in relation to multiple wildfires

Year of Publication
2012
Publication Type

Repeated perturbations, both biotic and abiotic, can lead to fundamental changes in the nature of ecosystems, including changes in state. Sagebrush steppe communities provide important habitat for wildlife and grazing for livestock. Fire is an integral part of these systems, but there is concern that increased ignition frequencies and invasive species are fundamentally altering them.

Feedback from Plant Species Change Amplifies CO 2 Enhancement of Grassland Productivity

Year of Publication
2012
Publication Type

Dynamic global vegetation models simulate feedbacks of vegetation change on ecosystem processes, but direct, experimental evidence for feedbacks that result from atmospheric CO 2 enrichment is rare. We hypothesized that feedbacks from species change would amplify the initial CO 2 stimulation of aboveground net primary productivity (ANPP) of tallgrass prairie communities.