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Ecosystem

Displaying 2921 - 2940 of 6066 results

Community‐level climate change indicators have been proposed to appraise the impact of global warming on community composition. However, non‐climate factors may also critically influence species distribution and biological community assembly. The…
Author(s): Adrián Regos, Miguel Clavero, Manuela D'Amen, Antoine Guisan, Lluis Brotons
Year Published:

Whitebark pine (Pinus albicaulis) forests have been declining throughout their range in western North America from the combined effects of mountain pine beetle (Dendroctonus ponderosae) outbreaks, fire exclusion policies, and the exotic disease…
Author(s): Robert E. Keane, Lisa M. Holsinger, M. F. Mahalovich, Diana F. Tomback
Year Published:

Summary: 1) Increased incidence of landscape fire and pollinator declines with co-extinctions of dependent plant species are both globally significant. Fire can alter species distributions, but its effects on plant–pollinator interactions are poorly…
Author(s): Julian Brown, Alan York, Fiona J. Christie, Michael A. McCarthy
Year Published:

The western spruce budworm (Choristoneura occidentalis occidentalis Freeman) is recognized as the most ecologically and economically damaging defoliator in western North America. Synchronous western spruce budworm outbreaks can occur over much of a…
Author(s): Todd M. Ellis, Aquila Flower
Year Published:

Collaborative groups are most effective when the varied stakeholder groups within them understand the risks of wildfire and take proactive steps to manage these risks. Implementing policies for fire risk mitigation and adaptation, however, remains…
Author(s): Antonie Jetter, Steven A. Gray, Lisa M. Ellsworth
Year Published:

Characterizing the impacts of wildland fire and fire suppression is critical information for fire management decision-making. Here, we focus on decisions related to the rare larger and longer-duration fire events, where the scope and scale of…
Author(s): Matthew P. Thompson, Francisco Rodriguez y Silva, David E. Calkin, Michael S. Hand
Year Published:

We characterized wildfire transmission and exposure within a matrix of large land tenures (federal, state, and private) surrounding 56 communities within a 3.3 million ha fire prone region of central Oregon US. Wildfire simulation and network…
Author(s): Alan A. Ager, Cody Evers, Michelle A. Day, Haiganoush K. Preisler, Ana M. G. Barros, Max W. Nielsen-Pincus
Year Published:

We collected field and remotely sensed data spanning 10 years after three 2003 Montana wildfires to monitor ecological change across multiple temporal and spatial scales. Multiple endmember spectral mixture analysis was used to create post-fire maps…
Author(s): Sarah A. Lewis, Andrew T. Hudak, Peter R. Robichaud, Penelope Morgan, K.L. Satterberg, Eva K. Strand, Alistair M. S. Smith, J Zamudio, Leigh B. Lentile
Year Published:

Wildfire and the threat it poses to society represents an example of the complex, dynamic relationship between social and ecological systems. Increasingly, wildfire adaptation is posited as a pathway to shift the approach to fire from a suppression…
Author(s): Hannah Brenkert-Smith, James R. Meldrum, Patricia A. Champ, Christopher M. Barth
Year Published:

Greater sage-grouse (Centrocercus urophasianus) are threatened by a continued loss of sagebrush (Artemisia ssp.) habitat. Recent, large scale wildfires have elevated the risk to sage-grouse as it may take up to several decades to more than a century…
Author(s): Kirk W. Davies, Matthew Madsen, Chad S. Boyd, Michael A. Gregg, April Hulet, Urban Strachan
Year Published:

In this issue of the GSD Update, we take a look back at selected studies of the Grassland, Shrubland and Desert Ecosystems Science Program (GSD) that depict its strengths and focus areas. Significant results of recent research and science delivery…
Author(s): Deborah M. Finch
Year Published:

An increasing number of threats, both natural (e.g. fires, drought) and anthropogenic (e.g. agriculture, infrastructure development), are likely to affect both availability and quality of plants that grouse rely on for cover and food. As such, there…
Author(s): Jennifer Sorensen Forbey, Gail L. Patricelli, Donna M. Delparte, Alan H. Krakauer, Peter J. Olsoy, Marcella R. Fremgen, Jordan D. Nobler, Lucas P. Spaete, Lisa A. Shipley, Janet L. Rachlow, Amy K. Dirksen, Anna Perry, Bryce A. Richardson, Nancy F. Glenn
Year Published:

Wildfire area is predicted to increase with global warming. Empirical statistical models and process-based simulations agree almost universally. The key relationship for this unanimity, observed at multiple spatial and temporal scales, is between…
Author(s): Donald McKenzie, Jeremy S. Littell
Year Published:

Fire is an important disturbance in forest ecosystems globally. Many of the effects of fire on forest processes are mediated through effects on vegetation structure. Understanding how fire properties, fire regimes and environmental variation…
Author(s): Michelle Bassett, Steven W.J. Leonard, Evelyn K. Chia, Michael F. Clarke, Andrew F. Bennett
Year Published:

During active fire incidents, decisions regarding where and how to safely and effectively deploy resources to meet management objectives are often made under rapidly evolving conditions, with limited time to assess management strategies or for…
Author(s): Christopher D. O'Connor, David E. Calkin, Matthew P. Thompson
Year Published:

Wildfire refugia are forest patches that are minimally-impacted by fire and provide critical habitats for fire-sensitive species and seed sources for post-fire forest regeneration. Wildfire refugia are relatively understudied, particularly…
Author(s): Crystal A. Kolden, Tyler M. Bleeker, Alistair M. S. Smith, Helen M. Poulos, A. E. Camp
Year Published:

This proceedings of a workshop summarizes presentations and discussions on ways in which science can help wildland fire planning and management be more strategic, reduce costs, and ultimately increase resilience to wildland fire, both on the land…
Author(s):
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Fire trails provide access into vegetation for controlled burns in fire-prone regions of the world. We examined the ecological impacts of fire trails on plant assemblages in edge habitat adjacent to trails in eucalypt woodlands of World Heritage…
Author(s): Daniel W. Krix, Matthew C. Hingee, Leigh J. Martin, Megan L. Phillips, Brad R. Murray
Year Published:

Wildfire risk assessment is increasingly being adopted to support federal wildfire management decisions in the United States. Existing decision support systems, specifically the Wildland Fire Decision Support System (WFDSS), provide a rich set of…
Author(s): Matthew P. Thompson, David E. Calkin, Joe H. Scott, Michael S. Hand
Year Published:

The effect of topography on wildfire distribution in the Canadian Rockies has been the subject of debate. We suspect the size of the study area, and the assumption fire return intervals are distributed as a Weibull distribution used in many previous…
Author(s): Marie-Pierre Rogeau, Glen W. Armstrong
Year Published: