Articles tagged with Trees
A team of Swedish scientists has discovered a key gene controlling tree growth and development, shedding light on the complex mechanisms behind flowering and dormancy. The findings hold promise for revolutionizing forest tree breeding and improving pulp, paper, construction, and bioenergy production.
A team of scientists has found that Pakistan experienced its wettest period in over 1,000 years during the 20th century, with precipitation rates increasing significantly. The study used ancient juniper tree rings to estimate humidity conditions and found parallels with global warming.
Researchers found that garlic mustard targets arbuscular mycorrhizal fungi, harming native plants and disrupting their growth. The invasive plant's phytochemical poisons disrupt native plants' mycorrhizal associations, stunting their growth.
A recent study challenges metabolic ecology models, which failed to explain tropical forest structure and dynamics. Instead, researchers found that environmental conditions and species traits play a crucial role in shaping these ecosystems.
Researchers investigate tropical forest structure, uncovering intricate relationships between tree diversity, spatial distribution, and environmental factors. The study reveals that tropical forests exhibit complex characteristics that resist simplistic explanations, highlighting the need for nuanced understanding of these ecosystems.
Researchers found that forest degradation and human presence significantly influence the prevalence of parasitic nematodes in red colobus monkeys. The study's results suggest that easily measurable indices like stump density can predict host-parasite dynamics and inform conservation efforts.
Researchers have discovered that the sweetgum tree contains significant amounts of shikimic acid, a key ingredient in the production of Tamiflu, a treatment for bird flu. This finding could help alleviate the global shortage of the drug, which has sparked concerns over a potential pandemic.
A study on the 2002 Biscuit Fire in Oregon found that fuel treatments significantly reduced tree damage and mortality. The research team measured the effects of two fuel treatments, including thinning and underburning, and concluded that reducing fine fuels is crucial for minimizing overstory tree damage.
A study of fossilized spiders from the Baltic and Dominican regions provides new insights into ancient spider ecologies. The research found that web-spinning spiders were larger in Baltic amber than in Dominican amber, with the size difference attributed to the type of trees in each region.
A landmark study reveals that older trees in tropical forests are more diverse than younger ones, suggesting that diversity is selected for as each forest matures. This finding highlights the importance of ecological value to species diversity in these complex ecosystems.
A recent study found that biodiversity arises from the same underlying processes in tropical rainforests and Minnesota prairies. Rare trees may have an advantage due to reduced vulnerability to predators and resource competition.
Researchers found that tap roots in deep-rooted plants transfer rainwater to reservoirs underground, redistributing water upwards during dry periods, increasing photosynthesis and transpiration. This effect can increase carbon uptake by 40% and impact global climate globally.
After a high-severity fire, natural conifer regeneration can occur, with seedlings per acre reaching up to 300, but logging reduces this by 71%. Logging can also produce fine fuels that increase fire risk. The study suggests leaving dead trees standing may reduce re-burn risks.
A new study led by Duke University suggests that growing tree plantations to remove carbon dioxide from the atmosphere may trigger environmental changes that outweigh some of its benefits. The research found that these plantations would lead to water and nutrient depletion, increased soil salinity and acidity, and decreased stream flow.
Conifers like Christmas trees survive due to efficient microscopic valves that allow water flow as easily as in flowering trees. The study found resistance to water flow was only 1.2 times greater in conifers, enabling them to dominate forests despite their shorter pipes.
Researchers found that up to half of Amazon's oldest trees are over 300 years old, with some reaching 1,000 years. This challenges previous studies suggesting the Amazon can absorb more carbon dioxide than predicted.
Research from Lawrence Livermore National Laboratory and Carnegie Institution suggests that planting trees in the US could cool the Earth for a few decades, but lead to planetary warming in the long term. Tropical forests, however, can help keep global temperatures cool by evaporating water and absorbing carbon dioxide.
Research suggests that elephants may be 'tipsy' due to marula tree bark containing a beetle pupae, not ethanol from the fruit. A high diet of marula fruit is unlikely to cause intoxication in three-ton elephants.
Research suggests past fires can predict vegetation composition and structure by analyzing tree rings. This insight helps scientists understand the role of fire in shaping ecosystems over time.
A recent study published in the Proceedings of the National Academy of Sciences found that nesting preferences are a crucial factor in determining whether an invasive ant species will establish itself. According to researchers, ground-nesting and arboreal ants with specific biological characteristics are more likely to succeed. The stu...
Researchers at Washington University in St. Louis report that Central American farmers have preserved genetic variation in the jocote by growing it locally for family consumption. This practice, despite large-scale deforestation, has helped maintain diversity in the species through multiple domestications.
Children with tree nut allergies can safely eat some nuts as they grow older, according to a new study. Researchers found that 9% of children passed an oral food challenge test, and those with low levels of tree nut antibodies were more likely to succeed.
A study found that approximately 9% of children with tree nut allergies can outgrow their condition, including those who have had previous severe reactions. Children with multiple types of tree nut allergies are unlikely to outgrow their allergy.
A new study reveals that tree diversity in tropical forests plays a crucial role in determining their ability to store carbon and provide other essential ecosystem services. The researchers simulated different extinction scenarios and found that the types of trees remaining had a significant impact on carbon storage capacity.
A new study reveals that selective logging in the Amazon Basin causes widespread destruction, losing an area roughly twice the size of Connecticut annually. This practice, which removes one or two trees and leaves the rest intact, contributes to climate change by releasing more carbon dioxide into the atmosphere than previously assumed.
A new satellite imaging method detects selective logging in the Brazilian Amazon, revealing twice the extent of forest degradation as previously estimated. Logging causes major ecological disruptions, including increased carbon flow to the atmosphere and area damage.
Paleontologist Sankar Chatterjee presents evidence that dinosaurs like Microraptor gui used biplane wings, which were likely the first experiment in natural flight. The discovery supports the trees-down theory, suggesting that avian flight began with gliding and then developed into powered flight.
Research revealed that a massive pinyon pine die-off in the Southwest was caused by hot and dry conditions, which are predicted by global climate change models. The study found that temperatures coupled with drought led to tree mortality, affecting ecosystems for decades.
The National Science Foundation has awarded $19 million in grants to 36 US institutions to better understand genetic processes in plants of economic importance. Researchers will study hybrid vigor, seed production, and trees to develop new products and practices.
Airborne LiDAR technology has been successfully used to monitor and protect rare species such as California spotted owls and Delmarva fox squirrels. The system provides detailed measurements of forest canopy, tree height and biomass, enabling researchers to identify suitable habitats for endangered species.
A team of scientists, led by Henry Howe from the University of Illinois Chicago, will conduct a multi-year test to restore diversity to agricultural landscapes in Veracruz, Mexico. They aim to demonstrate that bird- and bat-dispersed seeds can connect isolated tree species, promoting species diversity.
The emerald ash borer's invasive beetle population is rapidly spreading in Ontario's ash forests, despite containment efforts. The insect's distribution expanded dramatically in 2004, infecting new sites beyond a previously created firewall in Essex County.
A Duke University study found that high carbon dioxide levels stimulate pine needles to grow more, even under drought conditions. The factor most affecting needle volumes was the amount of nitrogen present in the soils.
Researchers have developed a new technique using oxygen isotopes in tree rings to identify past hurricanes. By analyzing late-season growth, they found records of all known hurricanes that hit the Southeastern US over the past 50 years, and even back as far as 1450 AD.
A study by Duke University researchers found that pine trees under elevated CO2 levels experienced increased growth in some years, but not consistently. The findings suggest that pine trees may be able to improve water use efficiency, but the results are mixed and more research is needed.
Scientists used radiocarbon dating to determine that human arrival in the Americas led to the extinction of prehistoric ground sloths. This suggests that big-game hunters had a significant impact on animal populations, contributing to widespread extinctions.
Cornell researchers presented several studies on ecological issues, including a new study that found fruit-eating fish in South America may become extinct due to overfishing. Another study revealed that coral-disease systems are sensitive to temperature fluctuations, with small changes having significant impacts on the ecosystem.
University researchers have discovered a key gene in the monoterpene biosynthesis of bark beetles, which could lead to new methods to disrupt aggregation pheromone production. This breakthrough may help control devastating insect infestations such as those affecting Lake Tahoe and Western forests.
A study by Texas A&M AgriLife Communications reveals that planting containerized seedlings in the fall can significantly increase the survival rate of pine tree seedlings, with a 93% survival rate compared to 67%. The shift in reforestation methods may help landowners improve their forest land management and reduce waste.
Penn State researchers are using neutron activation analysis to measure gold in tree rings and link them to volcanic eruptions. By analyzing the rings' chemical composition, they can identify patterns and correlations with known volcanic events.
A new software called Notung allows researchers to identify genes that arose recently and understand their role in modern organisms. The tool uses evolutionary scenarios and gene duplications to provide insights into gene evolution and function.
A USGS study reveals that the world's most productive forests, which add new growth each year, have lower birth and death rates. However, if these rates suddenly stop or double, tree numbers would halve in just 30 years. The study suggests that environmental changes considered beneficial to forests may bring about unexpected changes.
Research reveals a parallel between global forest productivity patterns and tree birth and death rates. In contrast, highly productive tropical forests undergo rapid tree replacement cycles.
A dynamic landscape model developed by Lieven Claessens predicts landslide-prone areas and calculates rainfall effects. The research aims to conserve kauri forests, which have prevented landslides for over 1,000 years in New Zealand's Waitakere Ranges Regional Park.
ParksWatch's investigation reveals widespread, unregulated mahogany logging within the remote Alto Purús National Park in the Peruvian Amazon. The report exposes the illicit trade of this valuable timber species, which threatens its survival and ecosystem health.
Researchers used high-altitude airborne imaging spectroscopy to identify two invading plant species, Myrica faya and Kahili ginger, in the Hawaii Volcanoes National Park. The study found that these invaders are altering the forest ecosystem by changing leaf nitrogen and water content, with potential domino effects on native species.
Researchers used tree-ring data to reconstruct years of low river flows in the Columbia River Basin back 250 years, revealing six multiyear droughts that were much more severe than anything in recent memory. These droughts persisted for years, including one that lasted 12 years.
Researchers have discovered that most C. atratus workers can glide back to their home tree after falling, a behavior crucial for survival in the high-risk tropical forest canopy. The ants use visual orientation and mechanisms to change direction and maintain a steady glide path through the air.
Researchers discovered that gliding ants, like Cephalotes atratus, can land on tree trunks and climb back up, with 85% success rate. The ants' ability to change direction mid-air is still a mystery, but it's likely due to their unique morphology, including flattened hind legs and head flanges.
Scientists at the University of Nevada discovered that plants absorb mercury from the atmosphere through their leaves, releasing it back into the environment. This finding has significant global implications for mercury controls and highlights the need for a collaborative effort to mitigate mercury pollution.
Dwarf mistletoe has an extreme water-pump seed ejection system that fires seeds up to 20 meters. This discovery could aid disease control by targeting the unique characteristics of dwarf mistletoe reproduction.
A NASA study reveals that planting trees on marginal agricultural lands can sequester significant amounts of carbon dioxide, potentially offsetting one-fifth of the US's annual fossil fuel emissions. Additionally, research suggests that insect outbreaks linked to droughts and heat waves may contribute to increased greenhouse gas levels.
Researchers identified phenolic compounds in pine bark extract with high biological activity, including potent inhibition of nitric oxide and prostaglandin production. The study suggests that consuming pine bark-based food supplements may help alleviate arthritis symptoms.
A Stanford University team is working to restore native forests in Hawaii by offering landowners financial incentives. They are focusing on the restoration of koa trees, which provide numerous ecosystem services including recharging freshwater aquifers and storing carbon.
The loss of gray wolves in western North America has triggered ecological effects on elk populations, beaver, birds, fish, and even tree species, leading to collapsing health of aspen and other vegetation.
Researchers constructed a phylogenetic tree using only 16,000 protein and DNA sequences from green plants, demonstrating the power of data-driven approaches in biology. By leveraging sequence databases, scientists can now refine their understanding of biodiversity with greater precision.
A five-year study by Virginia Tech researchers found that lead bullets do not leach into water tables or streams after landing on controlled shooting ranges. The study's findings suggest that lead is mostly absorbed in the top few inches of soil and does not pose a significant risk to wildlife.
Studies suggest that maximum parsimony, a simpler method, is more accurate than maximum likelihood in inferring historical relationships among species. The results published in Nature challenge the state-of-the-art technique's accuracy and highlight its limitations.
A $3 million NSF grant is enabling researchers to combine expertise and solve classification problems for flowering plants. The new system has broken up traditional groups and shuffled others, with Amborella forming the base of the tree.
A multi-species herbivore outbreak occurred in Panama following an El Niño drought, causing moth larvae to devour 250% more leaf material than usual. The short-lived event was brought under control quickly by natural predators and diseases, but highlights the potential impact of climate change on forest ecosystems.