Articles tagged with Trees
A new study published in Molecular Plant found that phosphorus deficiency contributes to the expression of citrus disease Huanglongbing symptoms. The researchers discovered microRNAs that can potentially be used as early diagnosis markers and applied phosphorus solutions to alleviated symptoms and improved fruit yield.
Researchers found that wetland trees are a major source of methane emissions, accounting for up to 80% of total emissions. This challenges current models and highlights the importance of including tree emissions in field campaigns. The study's findings have significant implications for understanding methane flux in tropical wetlands.
A University of Colorado Boulder-led study found significant declines in pinyon pine seed cone production due to regional warming and drought. The biggest declines were at higher elevation sites with more dramatic warming, which likely inhibits cone initiation and development.
A recent study found that hotter temperatures triggered a widespread die-off of Colorado trembling aspen trees, with the drought from 2000-2003 exacerbating the damage. The researchers used oxygen isotope analysis to determine that summer temperatures were the key factor in drying out surface soil and stressing the trees' water-transpo...
A study published in BioMed Central's open access journal Carbon Balance and Management suggests that afforestation can lead to cooler summers and wetter conditions in regions like Europe. Planting trees can provide localized benefits by making the surrounding air moister and cooler, sequestering carbon and protecting biodiversity.
Researchers found that the amino acid composition of red oak and sugar maple leaves is strikingly similar, contradicting conventional wisdom. Protein quality in oak leaves was higher than in maple leaves, partly explaining why maple trees are less nutritious.
A new study by researchers from the University of Gothenburg and Swedish University of Agricultural Sciences found that mixed forests provide positive relationships to six different ecosystem services. The study suggests that promoting more varieties of trees may increase these services, including tree growth, carbon sequestration, and...
A new study predicts that spring budburst will occur 8-40 days earlier by 2100, with the greatest changes in northern states, potentially giving deciduous trees a competitive advantage over evergreens. This shift may alter carbon sequestration and forest composition.
Researchers will analyze DNA of hundreds of balsam poplar trees to identify genes responsible for adaptation traits, combining with satellite maps and modeling techniques to predict regions at risk. This knowledge will help prioritize conservation efforts and understand the health of forests under changing climates.
A new tool devised by Berkeley Lab scientists detects forest mortality patterns and trends using satellite images, simulation modeling, and fieldwork. The study found that 9.1 to 16.9 percent of tree mortality was missing from conventional analyses, equating to over half a million dead trees per year.
Peach trees require specific chilling hours to produce flowers and fruit. Clemson researchers are studying the mechanisms of chilling and heat requirements to help breeders adapt cultivars to warmer winters. The goal is to maintain high fruit-quality traits while breeding for increased heat requirement.
Researchers have identified a genetic trait that enables willow trees to produce more biofuel when grown at an angle, increasing yields by up to five times compared to naturally growing trees. This breakthrough could lead to the development of more productive and sustainable bioenergy crops.
A new study by the USDA Forest Service found an association between tree loss and increased human mortality from cardiovascular and lower respiratory disease. The study analyzed data from 1,296 counties in 15 states and found that Americans living in areas infested with the emerald ash borer suffered from more deaths from these diseases.
A CU-led study reveals that pine beetle outbreaks do not harm adjacent stream water quality, but instead increase the uptake of nitrates by smaller trees and understory vegetation. This compensatory response provides potent water quality protection in western forests.
Researchers at USDA and University of California-Davis discovered distinctive amino acid profiles in oranges grown on HLB-positive or -negative trees. These profiles could serve as an early indicator of the pathogen's presence.
A new computer program, LandTrendr, has successfully teased out subtle changes in forest ecosystems by analyzing vast amounts of scientific data. By comparing satellite images to ground data, scientists uncovered the cause of slow-moving declines and recoveries of trees in Pacific Northwest forests.
Seeds from the Indian mahua and sal trees have shown promising thermal efficiency comparable to biodiesel, producing lower emissions of carbon monoxide and waste hydrocarbons. The use of tree seed oils could also provide additional benefits such as lower viscosity and greater volatility.
A study by Indiana University researchers found flame retardants at global locations, with high concentrations detected in tree bark samples, particularly in urban areas and near manufacturing facilities. The technique of using tree bark as a sampling medium proves effective in detecting these pollutants.
A new study reveals that the native Carolina Willow is thriving in Florida's St. Johns River due to stable water levels created by 1950s water-management projects. The invasive tree forms impenetrable thickets, using tremendous amounts of water and eliminating duck habitats.
A new study finds that climate warming is allowing bark beetles to thrive in previously inhospitable high-elevation forests, posing a significant threat to whitebark pine ecosystems. The insects are attacking trees with weakened defenses, leading to potential cascading effects on mountain ecosystems.
A study published in PNAS found that modern humans with feet adapted for terrestrial bipedalism can still climb trees effectively. Researchers observed extreme dorsiflexion and longer muscle fibers in climbing individuals, challenging the idea that a terrestrially adapted foot excludes arboreal behavior.
The loss of hemlock trees due to exotic pests and pathogens has an unexpected benefit: it allows hardwood species to thrive by releasing phosphorus into the soil. However, this shift also leads to increased nitrogen leaching from the soil, which can harm aquatic organisms.
A new study reveals that many Amazon tree species are likely to survive human-caused climate warming in the coming century. However, researchers warn of the impact of extreme drought and forest fires as temperatures rise. Conservation efforts should focus on reducing greenhouse-gas emissions and preventing deforestation.
New genetic analysis reveals that many Amazon tree species are likely to survive man-made climate warming in the coming century. The study finds that these trees have previously survived warmer climates and are expected to endure higher temperatures. However, droughts and forest fires remain major threats to the Amazon's future.
Researchers used infrared sensors and thermal technology to evaluate irrigation strategies in peach orchards. They found that midday canopy-to-air temperature differences were significantly higher in water-stressed trees, indicating the potential for effective management of water use.
Tropical montane cloud forest trees have been found to absorb water directly through their leaves from clouds, providing a crucial survival mechanism in foggy areas. However, the disappearance of these clouds due to climate change may render this adaptation useless for the ecosystem's survival.
A new study has provided detailed knowledge of the resin secretory system in Boswellia trees, revealing a 3-D network of inter-connected canals that allow for efficient transport of resin. This discovery could lead to improved tapping techniques, reducing damage to trees and ensuring their long-term survival.
The world's largest living organisms are facing an alarming decline in death rates among trees 100-300 years old. The study highlights the critical role of large old trees in regulating ecosystems, storing carbon, and supporting biodiversity. Researchers call for urgent action to identify causes and develop strategies for conservation.
Researchers used housing sales data to estimate how much home buyers are willing to pay for scenic vistas, outdoor recreation, and neighborhood tree cover. In Dakota County, home buyers were willing to pay $200-500 more per 10 percent increase in tree cover.
A recent study by George Washington University Professor Amy Zanne found that plants worldwide are operating at their safety threshold for drought, making forests vulnerable to environmental stress. The research reveals that while plants vary in drought resistance, they share similar hydraulic safety thresholds across all forest types.
Researchers at the US Department of Agriculture have developed a deficit-irrigation strategy for early-season peaches, which reduces post-harvest water levels by 25% without significantly affecting next year's yield. The study also found that subsurface drip irrigation systems had minimal effects on yield and fruit quality.
Scientists at Queen Mary University of London have sequenced the genetic code of a dwarf birch tree, a species crucial to British conservation. The decoded genome will aid in understanding disease resistance and growth shape, helping protect against the bronze birch borer pest threatening UK birch populations.
The North American Oak Skeletonizer has invaded Europe on planted Northern Red Oaks since 1989. The moth's arrival is attributed to air transport of cocoons from NATO aircraft, leading to the discovery of this previously unknown species in Europe.
A new study published in Behavioral Ecology and Sociobiology found that male grey tree frogs increase their courtship calls when they can see a female approaching. The research, led by Dr. Michael Reichert, suggests that visual cues play a crucial role in attracting mates in nocturnal anurans.
Researchers found that warmer springs are causing trees to leaf out earlier, threatening tree species like yellow birch and sugar maple. This altered landscape can lead to changes in wildlife populations, including deer replacing moose in the ecosystem.
Climate change, fire suppression, and invasive species are threatening mountain meadows in the Pacific Northwest. These ecosystems, once carpeted with grasses, shrubs, and wildflowers, are declining rapidly, with some areas experiencing a 35% increase in tree occupation over just 57 years.
The article assesses Australia's giant eucalyptus trees' classification as rainforest species, sparked by their unique relationship with fire. The study finds that despite being dependent on fire for regeneration, these trees coexist on the margins of rainforests and should be considered part of the ecosystem.
Researchers have created the most comprehensive family tree for birds, revealing recent and rapid diversification across nearly 10,000 species. Analysis shows that bird diversity has increased over the past 50 million years, with groups in northern North America and Eurasia exhibiting intense recent diversification.
A new study found that over 60% of western aspen trees in Utah and Colorado are triploid, with this genetic anomaly causing altered physical traits such as sterility or reduced fertility. The researchers also discovered a correlation between triploidy rates and regional climate variation.
The UK Government has imposed a ban on importing foreign ash trees due to the risk of fungal disease Chalara. Researchers argue that the nursery trade and plant buying public need to be more aware of biosecurity risks, and that public debate is needed to establish tougher international regulation.
A 20-year study at Harvard Forest Long-Term Ecological Research site reveals that leaving storm-damaged trees intact allows native plants and wildlife to thrive. The forest recovers naturally, with original conditions recovering more readily than after salvage logging.
A University of Tennessee study suggests recent droughts may be the new normal, posing significant threats to the nation's forests. The researchers found that the US has experienced several mega-droughts in the last 1,000 years, and projections indicate worsening drought and increased tree mortality by 2050.
A 12-year-long study by ICRAF reveals that combining legume trees with maize fields increases yield stability and reduces fertilizer use. This sustainable solution helps farmers cope with droughts and degraded soils, producing consistent and relatively high yields year after year.
A Yale University study found that most Northern conifer species emerged within the past 5 million years, with mountainous environments driving the formation of new species. The researchers also discovered significant differences in conifer evolutionary dynamics between the Southern and Northern Hemispheres.
Researchers at UC Berkeley have found that fox squirrels engage in a long-term savings strategy by diversifying their nut storage, with some nuts hidden up to 100 meters away. By studying this behavior, the team aims to understand how squirrels remember where they hide their nuts and develop insights into human decision-making.
USDA scientists are working to minimize the threat of Laurel wilt disease caused by the fungus Raffaelea lauricola, vectored by the redbay ambrosia beetle. Chemical attractants for beetle traps and fungicides to slow disease spread have been developed.
Researchers found that warmer temperatures and increased atmospheric evaporative demand will lead to widespread tree mortality and changes in forest distributions. The study used a 'Forest Drought Stress Index' to estimate annual regional tree-growth variability with exceptional accuracy.
The study reveals that southwestern forests face significant challenges due to climate change, including increased drought stress and mortality. The researchers developed a Forest Drought-Stress Index that shows a strong correlation with tree growth, death from drought, and area burned by forest fires.
Researchers have developed semi-dwarf trees through genetic modification, which can improve wood production, biomass production, branching, water-use efficiency, and root structure. The modified trees can also be more resistant to drought stress and better sequester carbon.
Researchers propose a new way to restore Africa's depleted soils through 'perenniation,' which combines food crops with trees and perennial plants, reducing the need for artificial inputs and improving soil health.
Researchers at UCSB and colleagues found that diagrams with a diagonal tree extending from left to right tend to be more easily accessible, leading to increased accuracy in comprehension. The study suggests that diagrams should be angled downward for better understanding.
A study led by Rice University found that the Pacific island of Guam has a staggering 40 times more spiders than neighboring islands due to the loss of forest birds caused by the invasive brown treesnake. The loss of birds, which consume spiders and compete with them for insects, has led to an increase in spider populations.
Researchers found that Western scrub jays gather around a dead bird's body and call loudly, attracting other birds to join in. The purpose of this behavior is unclear, but it may serve as a warning system or teach young jays about dangers.
Researchers found that droughts exacerbated by warming temperatures are causing plants to experience stressful growing conditions, especially in low to middle elevations. The study used a growing season index to model and map potential plant responses to droughts under past, present, and future conditions.
A new analysis examines the effects of widespread forest die-offs on ecosystem processes, species diversity, and human services such as water purification and real-estate property values. The study highlights the need for a multidisciplinary approach to understand the complex consequences of climate-driven forest mortality.
A study found that natural regeneration accounts for two-thirds of urban trees, but newly established young trees are less likely to be planted, with rates ranging from 1 in 12 to 1 in 20. The proportion of naturally regenerated trees is higher in grassland or desert regions and decreases in forested areas.
The Neolithic Age saw a direct connection between the development of an agricultural society and the emergence of sophisticated carpentry. Archaeological evidence suggests that as humans transitioned from hunter-gatherers to farmers, they also developed heavier axes and woodworking tools capable of felling trees.
A study by Carnegie Mellon University reveals that biogenic particles formed from pine tree emissions are chemically transformed by free radicals, altering their properties and concentrations. This finding can help improve climate and air quality prediction models and enable regulatory agencies to make more effective decisions.
Researchers at Yale University have discovered that diseased trees in forests can produce massive amounts of methane, a potent greenhouse gas. The estimated emission rate from an upland site is equivalent to burning 40 gallons of gasoline per hectare of forest per year.
The US Forest Service study found that New Hampshire has the highest percent tree cover (89%) and Connecticut has the highest urban tree cover (67%). Urban forestry is essential for sustaining urban forests, which provide environmental benefits such as air pollution reduction and heat island mitigation.