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Ecosystem

Displaying 941 - 960 of 5949 results

Forest landscapes across western North America (wNA) have experienced extensive changes over the last two centuries, while climatic warming has become a global reality over the last 4 decades. Resulting interactions between historical increases in…
Author(s): Paul F. Hessburg, Susan J. Prichard, R. Keala Hagmann, Nicholas A. Povak, Frank K. Lake
Year Published:

Forest fires are a well-known source of polycyclic aromatic hydrocarbons (PAHs), playing an important role on their formation and redistribution across the terrestrial and aquatic compartments. Fire-induced inputs of PAHs to the environment are of…
Author(s): Isabel Campos, Nelson Abrantes
Year Published:

Regeneration is an essential demographic step that affects plant population persistence, recovery after disturbances, and potential migration to track suitable climate conditions. Challenges of restoring big sagebrush (Artemisia tridentata) after…
Author(s): Daniel Schlaepfer, John Bradford, William Lauenroth, Robert K. Shriver
Year Published:

Post‐fire shifts in vegetation composition will have broad ecological impacts. However, information characterizing post‐fire recovery patterns and their drivers are lacking over large spatial extents. In this analysis we used Landsat imagery…
Author(s): Melanie K. Vanderhoof, Todd J. Hawbaker, Andrea Ku, Kyle E. Merriam, Erin Berryman, Megan E. Cattau
Year Published:

Bark beetle outbreaks and forest fires have imposed severe ecological damage and caused billions of dollars in lost resources in recent decades. The impact of such combined disturbances is projected to become more severe, especially as climate…
Author(s): Peter C. Jentsch, Chris T. Bauch, Madhur Anand
Year Published:

Wildland fire management decision-makers need to quickly understand large amounts of quantitative information under stressful conditions. Categorization and visualization 'schemes' have long been used to help, but how they are done affects the speed…
Author(s): Den Boychuk, Colin B. McFayden, Douglas G. Woolford, B. Mike Wotton, Aaron Stacey, Jordan Evens, Chelene C. Krezek-Hanes, Melanie J. Wheatley
Year Published:

This FEIS species review synthesizes information on the relationship of Lathyrus bijugatus (pinewoods sweetpea) to fire--how fire affects the species and its habitat, and fire management considerations. Information is also provided on the species…
Author(s): Janet L. Fryer
Year Published:

The idea that not all fire regimes are created equal is a central theme in fire research and conservation. Fire frequency (i.e., temporal scale) is likely the most studied fire regime attribute as it relates to conservation of fireadapted ecosystems…
Author(s): David Mason, Marcus A. Lashley
Year Published:

Because fire retardant can enter streams and harm aquatic species including endangered fish, agencies such as the U.S. Forest Service (USFS) must estimate the downstream extent of toxic effects every time fire retardant enters streams (denoted as an…
Author(s): Chris R. Rehmann, P. Ryan Jackson, Holly J. Puglis
Year Published:

Widespread fire activity taxes suppression resources and can compound wildfire hazards. We examine the geographic synchronicity of fire danger across western United States forests as a proxy for the strain on fire suppression resource availability.…
Author(s): John T. Abatzoglou, Caroline S. Juang, A. Park Williams, Crystal A. Kolden, Anthony L. Westerling
Year Published:

Fire behavior is well described by a fire’s direction, rate of spread, and its energy release rate. Fire intensity as defined by Byram (1959) is the most commonly used term describing fire behavior in the wildfire community. It is, however,…
Author(s): Gernot Ruecker, David Leimbach, Joachim Tiemann
Year Published:

Projected warming of global surface air temperatures will further exacerbate droughts, wildfires, and other agents of ecosystem stress. We use latewood blue intensity from high‐elevation Picea engelmannii to reconstruct late‐summer maximum air…
Author(s): Karen J. Heeter, Maegen L. Rochner, Grant Harley
Year Published:

Questions: Relative to a landscape with a mosaic of two sagebrush community types and increasing fire frequency, we asked: 1) Do vegetation characteristics vary significantly with number of times burned for each sagebrush community? 2) How do…
Author(s): Douglas J. Shinneman, Susan K. McIlroy, Marie-Anne de Graaff
Year Published:

Increased frequency and new types of disturbances caused by global change calls for deepened insights into possible alterations of successional pathways. Despite current interest in disturbance interactions there is a striking lack of studies…
Author(s): Lena Gustafsson, Victor Johansson, Alexandro B. Leverkus, Joachim Strengbom, Sofie Wikberg, Gustaf Granath
Year Published:

In response to large, severe wildfires across the western US, federal initiatives have been enacted to increase the pace, scale, and quality of ecological restoration in fire dependent forests. To address uncertainty and controversy in agreement…
Author(s): Kevin J. Barrett, Jeffery B. Cannon, Alex M. Schuetter, Anthony S. Cheng
Year Published:

As wildfires in the western United States continue to increase in size and number due to historical fire suppression and climate change, it is imperative for people living in fire-prone areas to “live with fire.” Fire suppression efforts are…
Author(s): Aaron M. Whittemore
Year Published:

Tree mortality associated with drought and concurrent bark beetle outbreaks is expected to increase with further climate change.When these two types of disturbance occur in concert it complicates our ability to accurately predict future forest…
Author(s): Charlotte C. Reed, Sharon M. Hood
Year Published:

Climate change in concert with fire suppression is increasing the size, severity and frequency of fires globally. At the same time, insects, an exceptionally biodiverse group that provide essential ecosystem services such as pollination and…
Author(s): Stephen C. Mason Jr., Vaughn Shirey, Lauren C. Ponisio, Jon K. Gelhaus
Year Published:

Firebrands are a widely observed phenomenon in wildland fires, which can transport for a long distance, cause spot ignition in the wildland–urban interface (WUI) and increase the rate of wildfire spread. The flame attached to a moving firebrand…
Author(s): Caiyi Xiong, Yanhui Liu, Cangsu Xu, Xinyan Huang
Year Published:

Extreme wildfires are increasing in frequency globally, prompting new efforts to mitigate risk. The ecological appropriateness of risk mitigation strategies, however, depends on what factors are driving these increases. While regional syntheses…
Author(s): Erin J. Hanan, Jianning Ren, Christina Tague, Crystal A. Kolden, John T. Abatzoglou, Ryan R. Bart, Maureen C. Kennedy, Mingliang Liu, Jennifer C. Adam
Year Published: