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tree : a woody perennial plant having a single usually elongate main stem generally with few or no branches on its lower part — Webster
Tree is a perennial plant with an elongated stem, or trunk, supporting branches and leaves in most species. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a woody trunk and branches as a way to tower above other plants to compete for sunlight. In looser senses, the taller palms, the tree ferns, bananas and bamboos are also trees. Trees tend to be long-lived, some reaching several thousand years old. The tallest known tree, a coast redwood named Hyperion, stands 115.6 m (379 ft) high. Trees have been in existence for 370 million years. — Wikipedia
Trees News -- ScienceDaily Read all about trees, including the latest research on many tree species, insect infestations, and the role of trees in ecology. Full articles, photos, free.
Genetic differences in trees untouched by...
on August 16, 2018 at 7:31 pm
A researcher has discovered that mountain pine beetles may avoid certain trees within a population they normally would kill due to genetics in the trees. […]
Logging permit fraud threatens timber species in...
on August 15, 2018 at 7:45 pm
Timber harvested illegally under fraudulent permits is undercutting conservation efforts in the Brazilian Amazon, new research by an international collaboration shows. […]
Frequent fires make droughts harder for young...
on August 15, 2018 at 7:44 pm
Forests in the eastern United States may have had it easy compared to their western counterparts, with the intense, prolonged droughts and wildfires that have become typical out west in recent years. But as the climate changes over time, eastern forests are also likely to experience longer droughts. And although wildfires are comparatively rare, prescriptive fires are increasingly used in the east. How will these forests fare in the future? A new study provides answers. […]
Protecting trees from imported pests
on August 15, 2018 at 12:59 pm
New research unravels the dynamics of tree production, economics and variability in demand to show how to reduce the risks of importing such damaging forest pests and diseases as oak processionary moth and ash dieback. […]
Trees and climate change: Faster growth, lighter...
on August 14, 2018 at 2:15 pm
Trees are growing more rapidly due to climate change. This sounds like good news. After all, this means that trees are storing more carbon dioxide from the atmosphere in their wood and hence taking away the key ingredient in global warming. But is it that simple? A team analyzed wood samples from the oldest existing experimental areas spanning a period of 150 years -- and reached a surprising conclusion. […]