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Ecosystem

Displaying 2121 - 2140 of 6011 results

Post-wildfire salvage logging is an increasingly used land management tool with poorly understood ecological consequences for understory flowering plants and their interactions with pollinators. Understanding these consequences of salvage logging is…
Author(s): Laura J. Heil, Laura A. Burkle
Year Published:

We discovered an error in our analysis that led us to underestimate tree mortality from fires and beetles in western California and northern Washington. We characterized fire extent and severity using the Monitoring Trends in Burn Severity raster…
Author(s): Logan T. Berner, Beverly E. Law, Arjan J. H. Meddens, Jeffrey A. Hicke
Year Published:

Population monitoring is integral to the conservation and management of wildlife; yet, analyses of population demographic data rarely consider processes occurring across spatial scales, potentially limiting the effectiveness of adaptive management.…
Author(s): Michael S. O'Donnell, David R. Edmunds, Cameron L. Aldridge, Julie A. Heinrichs, Peter S. Coates, Brian G. Prochazka, Steven E. Hanser
Year Published:

In subalpine forests of the western United States that historically experienced infrequent, high‐severity fire, whether fire management can shape 21st‐century fire regimes and forest dynamics to meet natural resource objectives is not known. Managed…
Author(s): Winslow D. Hansen, Diane Abendroth, Werner Rammer, Rupert Seidl, Monica G. Turner
Year Published:

Millions of hectares of lodgepole pine trees have been affected by the recent mountain pine beetle outbreaks, which also left significant numbers of live host trees in some areas. Studies have primarily focused on the changes of forest conditions in…
Author(s): Shiyang Zhao, Jennifer G. Klutsch, Jonathan A. Cale, Nadir Erbilgin
Year Published:

Recent, widespread spruce beetle (Dendroctonus rufipennis) outbreaks have driven extensive tree mortality across western North America. Post-disturbance forest management often includes salvage logging to capture economic value of dead timber,…
Author(s): Lucas R. Mattson, Jonathan D. Coop, Michael A. Battaglia, Anthony S. Cheng, Jason S. Sibold, Sara Viner
Year Published:

Most wildfires in North America are quickly extinguished during initial attack (IA), the first phase of suppression. While rates of success are high, it is not clear how much IA suppression reduces annual fire risk across landscapes. This study…
Author(s): Jonathan Reimer, Dan K. Thompson, Nicholas A. Povak
Year Published:

Wildfires strongly affect soils, including iron biogeochemical cycling and carbon storage. Thus, it is important to reveal the dynamics of iron oxide synthesis and transformations during and after a wildfire. This study investigates the temporal…
Author(s): Neli Jordanova, Diana Jordanova, Antonia Mokreva, Daniel Ishlyamski, Bozhurka Georgieva
Year Published:

Context: Lack of quantitative observations of extent, frequency, and severity of large historical fires constrains awareness of departure of contemporary conditions from those that demonstrated resistance and resilience to frequent fire and…
Author(s): R. Keala Hagmann, Andrew G. Merschel, Matthew J. Reilly
Year Published:

Over the past three decades, wildfires in southwestern US ponderosa pine (Pinus ponderosa Lawson & C. Lawson) forests have increased in size and severity. These wildfires can remove large, contiguous patches of mature forests, alter dominant…
Author(s): Suzanne M. Owen, Adair M. Patterson, Catherine A. Gehring, Carolyn Hull Sieg, L. Scott Baggett, Peter Z. Fule
Year Published:

Residents in the wildland-urban interface (WUI) can play an important role in reducing wildfire’s negative effects by performing wildfire risk mitigation on their property. This report offers insight into the wildfire risk mitigation activities and…
Author(s): James R. Meldrum, Hannah Brenkert-Smith, Pamela Wilson, Patricia A. Champ, Christopher M. Barth, Angela Boag
Year Published:

Wildfires and prescribed fires cause a range of impacts on forest soils depending on the interactions of a nexus of fire severity, scale of fire, slope, infiltration rates, and post-fire rainfall. These factors determine the degree of impact on…
Author(s): Daniel G. Neary
Year Published:

The assessment of burn severity is highly important in order to describe and measure the effects of fire on vegetation, wildlife habitat and soils. The estimation of burn severity based on remote sensing is a powerful tool that, to be useful, needs…
Author(s): Adrián Cardil, Blas Mola-Yudego, Ángela Blázquez-Casado, José Ramón González-Olabarria
Year Published:

Wildfires are increasing in frequency, severity, and size in many parts of the world. Forest fires can fundamentally affect snowpack and watershed hydrology by restructuring forest composition and structure. Topography is an important factor in…
Author(s): Jordan D. Maxwell, Anson Call, Samuel B. St. Clair
Year Published:

Smoke from human-induced fires such as prescribed fires can occasionally cause significant reduction in visibility on highways in the southern United States. Visibility reduction to less than three meters has been termed 'superfog' and environmental…
Author(s): Christian Bartolome, M. Princevac, David R. Weise, Shankar M. Mahalingam, Masoud Ghasemian, Akula Venkatram, Henry Vu, Guillermo Aguilar
Year Published:

Following high-severity wildfire, application of mulch on the soil surface is commonly used to stabilize slopes and limit soil erosion potential, protecting ecosystem values at risk. Despite the widespread use of mulch, relatively little is known…
Author(s): Jayne L. Jonas, Erin Berryman, Brett Wolk, Penelope Morgan, Peter R. Robichaud
Year Published:

Seed mixes used for postfire seeding in the Great Basin are often selected on the basis of short-term rehabilitation objectives, such as ability to rapidly establish and suppress invasive exotic annuals (e.g., cheatgrass, Bromus tectorum L.). Longer…
Author(s): Jeffrey E. Ott, Francis F. Kilkenny, Daniel D. Summers, Tyler W. Thompson
Year Published:

Woody‐plant encroachment represents a global threat to grasslands. Although the causes and consequences of this regime shift have received substantial attention, the processes that constrain reassembly of the grassland state remain poorly understood…
Author(s): Charles B. Halpern, Joseph A. Antos, Shan Kothari, Annette M. Olson
Year Published:

Wildfire, a primary natural disturbance in many forests, affects soil nutrient availability and spatial distributions of forest plants. However, post-fire changes in soil nutrients and spatial patterns of understory environments at fine scales are…
Author(s): Jian-jian Kong, Jian Yang, Bo Liu, Lin Qi
Year Published:

A new statistical model for predicting daily ground level fine scale particulate matter (PM2.5) concentrations at monitoring sites in the western United States was developed and tested operationally during the 2016 and 2017 wildfire seasons. The…
Author(s): Amy Marsha, Narasimhan K. Larkin
Year Published: