Articles tagged with Trees
A new analysis by Oregon State University and U.S. Geological Survey suggests that dense conifer forests may be harming dozens of animal species dependent on shrubs, herbs, and broad-leaf trees. At least 78 vertebrate species have been documented to require non-coniferous vegetation, which is often scarce in managed forests.
A decade-long experiment found that trees only store significant amounts of carbon when receiving sufficient water and nutrients, suggesting proposals to bank CO2 in trees may not be effective
A CU-Boulder study found that bird presence in conifers increases tree growth by up to one-third, removing damaging insects. The study's findings suggest a complex relationship between birds and trees, with implications for forest health and management.
A study found that mature forest produces almost 10 times as much sugar per hectare than recently logged forest, but overall honey yields are still high due to extensive flowering. Nectar production in young trees regrowing after logging is not significantly affected, contradicting beekeepers' concerns.
A new study published in Biological Conservation shows that wolves are allowing aspen trees to recover in Yellowstone National Park for the first time in over 50 years. The presence of wolves is altering elk behavior, causing them to avoid browsing in certain areas where they feel vulnerable, leading to a significant reduction in elk b...
A new study reveals a significant increase in creeping vines in southeastern US forests, with up to a 10-fold growth in just two decades. The vines' adhesive roots and tendrils are changing the forest's makeup, leading to a decrease in small tree density.
The loss of eastern hemlocks may lead to significant changes in streamflow, forest structure, and soil moisture. Eastern hemlocks play a crucial role in maintaining the ecological balance of mountain ecosystems, providing critical habitat for birds and other animals.
Researchers report that much of Tahiti's original genetic diversity still exists in remnant populations, offering a glimmer of hope for conservation efforts. The study suggests that targeted measures may preserve a representative fraction of the island's endemic tree snail genetic diversity.
Researchers at Oregon State University have successfully manipulated the growth in height of trees using genetic modification, creating miniature trees that can range from a few inches to over 50 feet tall. The findings offer potential for new products in the ornamental and nursery industries, but regulatory hurdles must be overcome.
A new Oregon State University study found that salvage logging and replanting increased fire severity in areas burned by the 2002 Biscuit Fire. Natural regeneration of forests appeared to result in less risk of severe future fires.
Scientists at the University of Liverpool discovered that humans' ability to walk upright developed from ancestors foraging for food in forest tree tops. They found that this trait evolved before walking on all fours on open land, and was later adapted for life on the ground.
A study by researchers found that wild orangutans' upright walking, or bipedalism, may have arisen in tree-dwelling apes, rather than in human ancestors. The discovery challenges the long-held savannah hypothesis and suggests that early human ancestors abandoned high canopies for forest floors, where they remained bipedal.
A recent study by Stanford University researchers found that tropical forest birds can thrive in coffee plantations with minimal restoration, highlighting the importance of preserving remnant trees and riparian corridors. The study suggests that humans and birds may coexist successfully if farmers leave small reserves of native forest.
Researchers reconstruct tree-ring record of upper Colorado streamflows back seven centuries, revealing 25-year drought period with 15% below normal flow. The megadrought spanned 1118-1179, with 13 consecutive years of below-normal flows, and is comparable to the region's last 100 years of below-average flows.
Research led by University of Arizona scientist Paul R. Sheppard found that tree rings from Fallon, Nev. showed quadrupled tungsten levels between 1990 and 2002, preceding a rise in childhood leukemia cases. The study suggests environmental contamination may be to blame for the cluster.
An international team of researchers has found evidence of the Earth's earliest forest trees, dating back 385 million years. The discovery includes upright stumps of fossilized trees that reached at least 8 meters in height, forming the first known forests on earth.
A new study published in Forest Ecology and Management found that logging after a wildfire can lead to high fuel accumulation, regardless of whether the site is logged or unlogged. The research showed that logging residue contributed to four times more fine fuels on the ground, while logging caused fewer snags and large woody debris.
A new study suggests that tropical rainforests are crucial in slowing down global warming, while planting trees in mid- and high-latitude locations could exacerbate climate change. The research confirms that forests in these regions would not only fail to mitigate the effects of global warming but also potentially increase temperatures.
New study suggests tropical forests are efficient at cooling the planet due to their ability to store large amounts of carbon and produce reflective clouds. In contrast, forests in snowy areas can warm the Earth by absorbing sunlight that would otherwise be reflected back into space.
Researchers from Oregon State University found a high level of naturally-regenerating tree seedlings in burned forest lands. The density of surviving conifers was similar to that of traditional old-growth forests, with some plots already having larger trees considered 'free to grow' by forestry standards.
Research reveals tree frogs maintain grip by keeping toe pad angle low, detaching at 90°. Larger species adapt to grasp objects, allowing them to climb like humans.
A comprehensive tree of mammalian evolution puts major diversifications well after dinosaur die-off, casting doubt on their impact. The team constructed a complete evolutionary tree using molecular data and fossil evidence, finding that diversification didn't take off until the Eocene epoch, about 56 to 34 million years ago.
A Smithsonian-led research team has won a scientific prize for their study on the impacts of habitat fragmentation on the Amazon ecosystem. The team found that tree communities are rapidly changing in forest fragments due to ecological changes near the margins, posing a significant threat to Amazonian biodiversity.
Researchers found that asexual bdelloid rotifers have evolved independently into distinct entities, with genetic and morphological cohesion within populations and divergence between them. This suggests that factors other than interbreeding control species cohesion and divergence in these organisms.
A University of Alberta study reveals that tundra treelines are advancing at a faster pace than previously thought, leading to significant changes in vegetation and habitat loss. The researchers found that warmer temperatures triggered an 'upslope surge' of trees, forcing out native species and altering the landscape.
Research in Hluhluwe-Umfolozi Park, South Africa, reveals that elephants' preference for marula fruits poses a risk to female Marula trees, which are more susceptible to damage and death. The study suggests that evolution may have favored the development of trees with better resprouting abilities to counter this selective pressure.
Researchers at the University of Vermont have developed a 'whey-based fungal micro-factory' to combat the eastern hemlock tree's decline due to an exotic pest. The approach involves spraying a sweet whey solution with targeted fungus into infected forests, promoting self-replication and reducing pesticide use.
Researchers found that ski pistes above tree line have fewer species and lower bird numbers compared to natural grassland at similar altitudes. Ecologists warn of potentially serious threat to wildlife habitat conservation in the Alps.
A large-scale study reveals that soil composition significantly influences where certain tree species grow in tropical forests. Researchers found strong associations between tree species and nutrient distributions, suggesting differences in nutrient requirements among trees may help explain coexistence.
Scientists analyzed rafflesia's genome to determine its closest relatives are in the Euphorbiaceae family, with blossoms just a few millimeters in diameter. The plant's massive increase in flower size over millions of years is one of the most significant among living organisms.
In semi-arid environments, trees have evolved to access moisture from bedrock fractures and quickly recover when heavy rains occur. Understanding these surface-atmosphere interactions is crucial for predicting water supplies and managing scarce resources.
Red squirrels have figured out a way to predict spruce tree seed crops months in advance and bet on the most abundant harvests. By producing second litters before bumper crop seasons, they increase their chances of survival and reproductive success.
The production of frankincense is declining in the Horn of Africa due to intensive tapping, which diverts carbohydrates from reproductive organs. The study suggests that less intensive tapping procedures and rest periods are needed to ensure sustainable production.
A new study reveals that planting trees can help slow down global warming, particularly in tropical rainforests where they absorb carbon dioxide and increase cloudiness. However, afforestation in mid- to high-latitude locations may actually create a net warming effect due to the albedo effect of forest canopies.
Scientists have created a reversible, non-destructive chilling method to study below-ground carbon allocation in trees. This technique temporarily interrupts carbon movement and leaves the tree alive, allowing for accurate measurement of carbon storage.
The study found that different seed dispersal methods, such as gravity and wind, result in distinct patterns of tree clustering in tropical forests. Trees with ballistic dispersal tend to cluster tightly, while those with wind-dispersed seeds have surprisingly tight clusters due to the dense forest canopy.
Research reveals that Amazonian forests are undergoing a rapid transformation as a result of fragmentation, leading to the loss of rare and slow-growing tree species. The study found that small, fast-growing trees store less carbon, contributing to global warming.
Researchers found that northern forest fires could lead to a net cooling effect due to the reflection of sunlight by deciduous trees with light green leaves. This study suggests re-examining strategies for reducing carbon dioxide emissions through ecosystem management.
Scientists at UCI found that forest fires can lead to cooling of the northern climate due to increased snow reflectivity. This study suggests that preventing boreal forest fires could have unintended consequences on global temperatures.
A new method of measuring forest cover considers volume, biomass, and captured carbon, showing a growing trend in most countries. Richer nations with higher GDP per capita tend to have more forested areas, biomass, and carbon.
A new study by Oregon State University researchers found that cougar predation has a significant impact on the environment, leading to severe ecological damage and loss of biodiversity in Zion National Park. The 'trophic cascade' effect, where the decline of a major predator leads to changes in herbivore populations and behavior, is ev...
Researchers found that waxed and inactive tree frogs have similar metabolic rates as unwaxed, dehydrating frogs, challenging the idea of a hibernation-like dormant state. Tree frogs use wiping behaviors to conserve energy by reducing surface evaporation by up to 4%, but this does not lead to significant changes in metabolic rate.
A new University of Florida study finds that live oaks are dying off as they are crowded and overshadowed by the encroachment of taller trees, threatening their survival. The study's co-authors mapped crown densities in Alachua County, Florida, revealing that sweet gum, black cherry, and magnolia are among the culprits.
Scientists sequenced the first complete tree genome, poplar, to develop sustainable plantation forestry and biofuels production. The research identified over 45,000 protein-coding genes and 93 genes associated with cellulose production.
Researchers at MIT have found a unique cloud forest in Oman where trees extract moisture from passing clouds, but the ecosystem is under threat from over-grazing camels. The trees' ability to collect water from fog may not be enough to recover if the camels continue to eat too much foliage.
Researchers have successfully unraveled the first tree genome, that of the poplar, revealing approximately 45,000 genes. This knowledge can help accelerate bio-ethanol production and improve trees' efficiency in processing biomass for paper and energy.
A NASA-funded study uses satellite data to monitor forest growth and health, detecting the effects of climate change on tree species and forest composition. The MODIS dataset shows a strong link between forest productivity and the number of tree species, enabling scientists to better predict future changes.
A recent study published in Science found that the number of tree species consumed by rainforest insects is comparable to those in temperate forests. The research, led by University of Minnesota plant biologist George Weiblen, rejects the notion that tropical insects are picky eaters who prefer fewer host plants.
Researchers found that loblolly pines growing under elevated carbon-dioxide concentrations fared better during and after a major ice storm than those with current levels. The study suggests that forests may suffer less damage during each ice storm event in a future with higher atmospheric CO2.
Genetic analysis of Alaskan spruce trees reveals a tree refuge in Alaska during the last glacial period, suggesting slower migration rates than previously thought. The findings have important implications for understanding plant responses to climate change and conserving biodiversity.
The Laccaria genome sequence will provide critical insights into the symbiotic relationship between trees and fungi, enabling faster-growing trees with enhanced biomass production. The study highlights the importance of mycorrhizal fungi in terrestrial ecosystems and their potential to mitigate climate change.
Scientists found that genetic diversity in foundation species, like the cottonwood tree, drives the structure of entire ecosystems. This knowledge has far-reaching implications for conservation efforts and understanding the impact of genetically modified organisms on landscapes.
A recent study published in Science found a direct link between tropical tree species diversity and the diversity of leaf-eating insects. The research team compared insect feeding habits in temperate and tropical forests, concluding that higher tree diversity supports more insect species.
Researchers study the impact of changing river hydrology, exotic pests, land development, and sociopolitical and economic factors on tupelo honey production. Beekeepers face difficulties in producing honey, with some colonies losing up to 50% due to infestations.
Plant diseases such as Dutch elm disease and dogwood anthracnose threaten urban tree health, while environmental stresses like flooding and pollution harm their vitality. Urban forestry experts emphasize the importance of managing these issues for community well-being.
Scientists found that the same mechanism regulates vein formation in leaves and branches, changing plant development studies. The discovery sheds light on plant growth and may lead to new ways of manipulating plant development.
Researchers found evidence of ancient fig domestication at Gilgal I site, suggesting humans selectively propagated a parthenocarpic mutant around 11,400 years ago. This marked the beginning of agriculture and a significant change in human history.
Researchers have identified the genes CO and FT responsible for tree flowering and reproduction, which could lead to faster breeding programs and strategies. This breakthrough may also help predict how trees will respond to climate change.
Researchers used tree-ring records and gauged streamflows to reconstruct historic Colorado River streamflows, dating back to 1490. The reconstructions suggest that droughts more severe than the recent 100-year period occurred in the past, with at least eight droughts similar in severity to the 2000-2004 drought.
Scientists have discovered that ancient genes, including Constans (CO) and Flowering Locus T (FT), dictate flowering and fall bud set in trees. This finding has significant implications for understanding tree maturation and adaptation to climate change, as well as speeding up tree breeding.