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Keyword: resilience

Big trees, bark beetles, goshawks, and timber

Science Spotlights Posted on: August 21, 2019
Throughout the Rocky Mountains over the last century, large ponderosa pine trees provided lumber for growing cities and towns, along with fuel and timber for the mining and railroad industries. Most of these forests are now occupied by dense young and mid-aged forests highly susceptible to being killed by bark beetles and burned by wildfires. These conditions have been exacerbated by fire suppression and urban encroachment. As a result, knowledge is needed to inform management actions directed at restoring and conserving ponderosa pine forests. 

Stable or seral? Fire-driven alternative states in aspen forests of western North America

Publications Posted on: August 19, 2019
As important centres for biological diversity, aspen forests are essential to the function and aesthetics of montane ecosystems in western North America. Aspen stands are maintained by a nuanced relationship with wildfire, although in recent decades aspen mortality has increased.

Integration and tradeoffs [Chapter 9]

Publications Posted on: August 14, 2019
Managing for sagebrush ecosystems that are resilient to disturbance and resistant to invasive plants often requires managers to make tough decisions in the face of considerable complexity and uncertainty. The decisionmaking environment is often characterized by multiple management objectives, limited management authority and capabilities, dynamic ecosystems and plant communities, and uncertain responses to management actions.

Wild horse and burro considerations [Chapter 8]

Publications Posted on: August 14, 2019
Wild horses (Equus caballus) and wild burros (E. asinus), like domestic livestock, can alter sagebrush ecosystem structure and composition and affect habitat quality for sagebrush dependent species (Beever and Aldridge 2011). The presence of Federally protected wild horses and wild burros can also have substantial effects on the capacity for habitat restoration efforts to achieve conservation and restoration goals.

Livestock grazing management [Chapter 7]

Publications Posted on: August 14, 2019
Part 1 of the Science Framework identifies livestock grazing as the most widespread land use in the sagebrush biome (Chambers et al. 2017a; hereafter, Part 1). In the Conservation Objectives Team Report (USDOI FWS 2013) improper livestock grazing is considered a present and widespread threat to Greater sage-grouse (Centrocercus urophasianus; hereafter, GRSG) for most GRSG populations.

Application of national seed strategy concepts [Chapter 6]

Publications Posted on: August 14, 2019
Native plant species are the foundation of sagebrush ecosystems and provide essential habitat for wildlife species, such as Greater sage-grouse (Centrocercus urophasianus; hereafter, GRSG).

Invasive plant management [Chapter 5]

Publications Posted on: August 14, 2019
One of the most significant stressors to the sagebrush biome is expansion and dominance of nonnative ecosystem-transforming species, particularly invasive annual and perennial plants.

Wildland fire and vegetation management [Chapter 4]

Publications Posted on: August 14, 2019
Wildland fire has always been an important ecosystem process across the sagebrush biome. Recently, the scale of sagebrush ecosystem loss and fragmentation has increased due to a combination of uncharacteristic wildland fire, invasive annual grasses, juniper (Juniperus spp.) and piñon (Pinus spp.) expansion, and anthropogenic land use and development.

Climate adaptation [Chapter 3]

Publications Posted on: August 14, 2019
Management actions that enable adaptation to climate change and promote resilience to disturbance are becoming increasingly important in the sagebrush biome. In recent decades temperatures have increased, growing seasons have lengthened, and in many areas the timing and amount of precipitation has changed (Chambers et al. 2017 [hereafter, Part 1], section 4; Kunkel et al. 2013a,b,c).

Adaptive management and monitoring [Chapter 2]

Publications Posted on: August 14, 2019
Monitoring programs designed to track ecosystem changes in response to both stressors and disturbances use repeated observations of ecosystem attributes. Such programs can increase our understanding of how interactions among resilience to disturbance, resistance to invasive species, and “change agents” including management actions influence resource conditions (or status) and trends and outcomes of conservation and restoration actions.

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