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Ecosystem

Displaying 1181 - 1200 of 6051 results

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:

The National Cohesive Wildland Fire Management Strategy (hereafter: Cohesive Strategy) mandates the restoration and maintenance of landscapes, with the goal that “landscapes across all jurisdictions are resilient to fire-related disturbances in…
Author(s): Sharon M. Hood, Donald A. Falk, Martin Nie
Year Published:

Air pollution, particularly fine and ultrafine particulate matter aerosols, underlies a wide range of communicable and non-communicable disease affecting many systems including the cardiopulmonary and immune systems, and arises primarily from…
Author(s): Ira Leifer, Michael T. Kleinman, Donald R. Blake, David Tratt, Charlotte Marston
Year Published:

Strong and variable winds in thunderstorm outflow boundaries interact with wildland fires, often spreading flames faster to threaten firefighter safety and amplify economical destruction. These boundaries are difficult to detect in complex terrain…
Author(s): Katja Friedrich, Julie Lundquist
Year Published:

Fire frequency and severity in southern California and across the western United States is increasing, posing a concern to the safety and well-being of communities and ecosystems. Increased aridity coupled with water stressed vegetation from…
Author(s): Alicia M. Kinoshita, Brenton A. Wilder
Year Published:

Numerous studies have linked outdoor levels of PM2.5, PM10, NO2, O3, SO2, and other air pollutants to significantly higher rates of Covid 19 morbidity and mortality, although the rate in which specific concentrations of pollutants increase Covid 19…
Author(s): Luke Curtis
Year Published:

Smoke, as a prominent character of combustion, is widely regarded as a signal of forest fire. Existing in a video-based smoke root detection methods on rely the distance between smoke and the lens, which is one of the most challenging parts. In…
Author(s): Yu Gao, Pengle Cheng
Year Published:

Recent increases in destructive wildfires are driving a need for empirical research documenting factors that contribute to structure loss. Existing studies show that fire risk is complex and varies geographically, and the role of vegetation has been…
Author(s): Alexandra D. Syphard, Heather Rustigian-Romsos, Jon E. Keeley
Year Published:

The advancement of three-dimensional, time-dependent fire behaviour models is best supported by publicly available, co-located, synchronised, quality-assured measures of pre-fire, active fire and post-fire conditions (i.e. integrated datasets).…
Author(s): Derek McNamara, William E. Mell
Year Published: