Mosseler  , I. Thompson  and B. Pendrel .
Dear EarthTalk : How much "old growth" forest is left in the United States and is it all protected from logging at this point? As crazy as it sounds, no one really knows how much old growth is left in America's forested regions, mainly because various agencies and scientists have different ideas about how to define the term. Generally speaking, "old growth" refers to forests containing trees often hundreds, sometimes thousands, of years old.
Keep it Wild. Make a Donation. Old-growth forests in Oregon can be ancient, such as the to year-old cedar groves in Opal Creek Wilderness and in the Big Bottom area of the Clackamas River.
The soaring canopy and dense understory of an old-growth forest could provide a buffer for plants and animals in a warming world, according to a study from Oregon State University published today in Science Advances. Comparing temperature regimes under the canopy in old-growth and plantation forests in the Oregon Cascades, researchers found that the characteristics of old growth reduce maximum spring and summer air temperatures as much as 2. Landowners who include biodiversity as a management goal, the scientists said, could advance their aims by fostering stands with closed canopies, high biomass and complex understory vegetation.
Of Indiana's original 20 million acres of forest, fewer than 2, acres of old-growth forests remain intact. Most of the sites that remain are now protected as nature preserves, and many have been selected as National Natural Landmarks. The first thing you notice when you enter an old-growth woods is the sheer size of the trees.
This is a list of existing old-growth "virgin" forestsor remnants of forest, of at least 10 acres 4. NB: The terms "old growth" and "virgin" may have various definitions and meanings throughout the world. See old-growth forest for more information.
Mature forest trees range in age from 60 to 80 years, for the younger softwoods or hardwoods respectively, up to years in age. The growth of the trees in a mature forest reduces significantly at this stage. Some fallen trees are typical in this setting, which opens the canopy to sunlight reaching the forest floor.
An old-growth forest — also termed primary forest or late seral forest — is a forest that has attained great age without significant disturbance and thereby exhibits unique ecological features and might be classified as a climax community. The concept of diverse tree structure includes multi-layered canopies and canopy gaps, greatly varying tree heights and diameters, and diverse tree species and classes and sizes of woody debris. Old-growth forests are valuable for economic reasons and for the ecosystem services they provide. This can be a point of contention when some in the logging industry may desire to cut down the forests to obtain valuable timber, while environmentalists seek to preserve the forests for benefits such as maintenance of biodiversity, water regulation, and nutrient cycling.
Click in the image below to download the English version of this document Spanish version also available here. The variety of profiles and knowledgement dictates the necessity to create comprehensive information that responds to the needs of each group and that also provides basic information to non-especialized audiences. For its creation, LIFE Red Bosques has relied on scientific literature and a large group of experienced experts in the matter with the intention to contribute to the appreciation of the last remainings of the Primeval Forest that still exist in our continent.