A new study published by US Forest Service researchers explores the impact of leaf-eating insects on forest ecosystems worldwide. The findings suggest that warmer climates affect plant-herbivore interactions, leading to changes in carbon and nutrient cycling in broadleaved forests globally.
Scientists have discovered that planted mangroves can store a significant amount of carbon, reaching levels comparable to those in intact stands after just 20 years. The study used logistic models compiled from over 700 planted mangrove stands worldwide and found that the trees' carbon stock reached 71-73% of that found in intact stands.
A recent study by USDA Forest Service researchers found that thinning and prescribed fire can significantly reduce tree mortality and increase tree growth. The study compared two thinning methods and found both were effective in reducing tree deaths and promoting healthy forests.
A recent study found that California's urban forest canopy cover per capita is the lowest in the US, despite providing significant ecosystem services valued at $8.3 billion annually. The state's arid climate and high population density may contribute to this result.
Researchers found that Hawaiian birds timed their breeding and molting with the availability of specific flowers, which in turn was linked to heavier rainfall periods. This suggests that climate changes can cascade up the food chain and affect wildlife abundance.
Research by the USDA Forest Service found that specific characteristics, such as water depth and vegetation height, significantly influence Yosemite toad breeding pool suitability. The study's findings provide valuable insights for land managers to conserve the species.
The study found that salvage logging after a severe wildfire did not significantly affect the diversity and abundance of native plant species in the forest. However, some shrub communities were affected due to reproduction cycle timing and seed germination triggered by heat from fire. The research suggests that longer-term studies supp...
Researchers discover first direct evidence of hoary bats going into torpor, or hibernation, in California's redwood forests. The study suggests that the bats' roosting habitat may be the key to understanding why they hibernate despite being migratory species.
A new study estimates California's street trees provide benefits worth $1 billion, including carbon storage, air pollutant removal, and energy savings. The study also highlights the need for tree diversification and density management to optimize urban forest performance.
Research shows that restoring and protecting streamside meadows can help keep streams cool for the California golden trout, which are threatened by rising temperatures. The study found that water temperatures approached the upper limit of tolerance in areas with suitable habitat, but were cooler in ungrazed meadow areas.
A study published in PLOS One reveals that fishers in California are being poisoned by rat poisons used on illegal marijuana farms, leading to a 233% increase in poisoning-related deaths. The toxicants are particularly deadly for male fishers, which are five times more likely to die from poisoning than predation compared to females.
Researchers attached geolocators to Prothonotary Warblers in Louisiana, tracking their migration patterns that spanned at least 5,000 miles across seven countries. The study provides new insights into the birds' migratory behavior and wintering locations.
Climate change and rising temperatures are giving rise to 'hotter' droughts, causing abnormally high levels of forest mortality. Temperate forests may convert to new ecological states, leading to widespread ecosystem service losses.
Researchers identified two genetic lineages of the walnut twig beetle, one native to the Southwest and another invasive throughout the US. Hybridization between lineages was found in areas where the invasive lineage has expanded, threatening eastern black walnut trees.
Researchers found that young tropical forests experienced significant declines in manakin survival during dry weather associated with El Niño events. In contrast, mature forests showed stable survival rates regardless of climatic shifts, suggesting a constant abundance of fruit resources.
A study in California's Sierra Nevada region found a nine-fold increase in standing dead trees and nearly three times more logs on the ground, but smaller and more decayed pieces. This shift poses a challenge for forest managers, who must balance habitat value with fire hazard reduction.
Researchers studied the 2013 Rim Fire in Yosemite National Park and found that extreme weather conditions, such as pyro-convective plumes, significantly influenced burn severity. Forests that experienced recent fires burned at low severity, while those with greater shrub cover burned at higher severity.
A new study finds that soil organic carbon decomposition does not accelerate under climate warming, but its storage remains constant. Ecosystem productivity increases with temperature change, while coarse wood decomposition and plant growth rates rise.
The current state of knowledge on wildland fire emissions highlights critical gaps in understanding their impact on climate and terrestrial carbon cycling. Scientists emphasize the importance of continued research to address these knowledge gaps.
Research by the USDA Forest Service finds that woodland salamander predation on invertebrates increases litter retention and carbon capture. The study, led by Dr. Hartwell Welsh Jr., suggests that these small animals play a significant role in regulating forest ecosystems.
A study of forest changes reveals a 2.4 times increase in tree density since 1929, with fewer pine trees and more fir and cedar, leading to reduced biodiversity and increased susceptibility to severe fires. The findings highlight the importance of restoring fire resilience and improving biodiversity in forests.
Researchers found that site quality affects the relationship between density and mortality in ponderosa pine stands. Thinning forest stands can reduce fuel buildup and enhance growth of residual trees, while early shrub removal and tree density control are most effective ways to reduce fuel buildup.
Researchers found that woodland salamander populations closely track forest stand growth and development, making them a viable indicator of ecosystem recovery. The study's findings suggest that healthy forests support a wide range of species, including rare and native wildlife, and are crucial carbon sinks.
A recent study by the USDA Forest Service's Pacific Southwest Research Station reveals that female fishers living near areas with high concentrations of illegal marijuana sites have higher exposure to rodenticides and lower survival rates. The study's findings underscore the urgent need for regulating pesticide use in these areas.
A recent study published in Atmospheric Environment found that air pollution from wildland fires and urban areas is reducing air quality at Devils Postpile National Monument. Ozone concentrations exceeded California standards, posing a risk to sensitive individuals, and may have phytotoxic effects on plants.
A recent study by the USDA Forest Service's Pacific Southwest Research Station has found that fisher populations in the southern Sierra Nevada are stable. The research, which monitored fisher distribution across a 7,606-square-mile area over eight years, found no increase or decrease in population numbers.
A new study by the USDA Forest Service reveals that climate conditions significantly impact bark beetle outbreaks, with optimal temperatures ranging from 1-4 degrees Celsius. Lower cumulative precipitation in prior years and higher current year precipitation also increase the likelihood of outbreaks.
A recent study found that native plant restoration alone is not enough to prevent non-native species invasion in Hawaii's tropical dry forests. Instead, long-term sustainability measures are needed to manage non-native species and ensure ecosystem resilience.
A recent report synthesizes published studies on the impact of bark beetles on wildfires, revealing that tree mortality can indeed affect fuels and fire behavior. However, the extent of these effects depends on various factors, including the time since the outbreak and the type of fuel or fire characteristic being studied.
A team of scientists created a methodology that considers timber vulnerability, harvesting value, and fire behavior to estimate potential net losses from timber production and fire survival probability. This approach helps fire managers and planners evaluate the economic impacts of wildfires on timber resources.
A recent study by USDA Forest Service researchers found that removing the invasive Tamaligi tree greatly improves the health of its diverse native forests in American Samoa. Native tree species quickly recover and persist after control efforts, while biomass levels are restored to equivalent pre-invasion levels.
A recent study published in Ecological Applications found that wildfires in northwestern California have not become more severe, despite increasing in size. The study suggests that less intense fires can be used to achieve ecological and management goals, offering a new approach to wildfire management.
Researchers developed topographic models using LiDAR data to predict habitat suitability for endangered plants in dry environments. The team plans to use satellite observations to create digital elevation models, guiding effective restoration efforts and identifying suitable areas for plant growth.
Researchers have developed an interactive tool to visualize how changes in date and weather conditions affect bat presence at wind energy facilities. The tool can help reduce bat fatalities by maximizing energy production on nights with low fatality risk while minimizing impacts on migratory bats.
Researchers found a 60% decrease in marten detections since the 1980s due to habitat degradation. Suitable habitat for martens has decreased by 25% since the 1980s.
Research on Rana boylii reveals tadpoles are weak swimmers and don't survive high-flow events, while habitat modeling tools provide reliable predictions. The study's findings guide conservation planning for the species, emphasizing the importance of mimicking natural flow patterns to conserve riverine species.
A recent study found that mangroves store up to four times more carbon per hectare than most tropical forests. The high-carbon storage capacity of mangroves can be attributed to their deep organic-rich soils and complex root systems.
A team of scientists has developed new methods for mapping carbon in Hawaii's forests, resulting in more accurate estimates and a lower cost. The approach reveals fundamental ecological controls over carbon storage and provides valuable insights into the state and dynamics of the world's forests.
A study by the US Forest Service and University of California, Santa Barbara found that warmer temperatures and reduced precipitation lead to lower tree fitness in southwestern US forests. This weakening of forest health has resulted in higher mortality rates from wildfires and bark beetle attacks.
The research team aims to create hybrid ecosystems with a mix of native and non-native species, optimizing carbon storage and supporting native biodiversity. The project will begin in April 2011 and be conducted over five years, focusing on finding ways to co-exist with invasive species.
The USDA Forest Service's More Kids in the Woods program provides week-long summer day camps focused on natural resources themes. The camps, supported by local partners, promote environmental awareness and stewardship among young people.
A new guide from the USDA Forest Service provides a tool to calculate the benefits of urban trees in Northern California. The study found that large-stature trees produce the highest benefit-to-cost ratio and can provide $516,800 in benefits over 40 years.
A new literature review synthesizes information on climate change, pathogens, and forests to inform land managers. The study reveals that climate change generally leads to reductions in tree health and improves conditions for certain damaging pathogens, such as Phytophthora and Red Band Needle Blight.
Research on the Sierra Nevada yellow-legged frog reveals strong site fidelity, but also highlights the negative impacts of a changing climate and introduced non-native trout. The study found that frogs with strong site fidelity are returning to lakes that dry up or have reduced breeding success due to predation by invasive trout.
New research documents American pika's wider temperature tolerance than previously thought, with 12% of occupied sites below historic records. Rock formations buffer pikas from warming temperatures, suggesting a greater distribution in the region.
Dr. Constance Millar has been recognized with the USDA Forest Service Deputy Chief's Distinguished Science award for her groundbreaking research on forest ecosystems' response to climate change. Her work aims to inform land management planning and adaptation strategies for a changing climate.
A rare beetle, Agrilus coxalis, has attacked 67 percent of oak trees in an area east of San Diego, threatening fire danger and wildlife habitats. The beetle's origin and spread are still unknown, but research is needed to determine its distribution, seasonal active periods, and natural enemies.
A study published in Northwest Science has verified the origins of a California wolverine through genetic analysis. The animal, photographed in 2008, is most closely related to Rocky Mountain populations and shares unique genetic characteristics with other North American wolverines.
Removing non-native trout from mountain lakes reverses their impact on aquatic insect populations. Aquatic insect abundance increases quickly after trout removal, but suspension of stocking alone is ineffective in restoring insect numbers.
A study by the USDA Forest Service found that aerial application of laminated flakes containing verbenone reduced mountain pine beetle attack rates by three-fold in California and Idaho. The technique could provide a large-scale solution to slow the spread of the beetles, which are devastating lodgepole pine stands across the West.