Old growth forest : Uncut or regenerated primary forest that has not been seriously disturbed by human activities or natural disasters for several hundred years or more.
Are uniformly aged tree forests of one species that are often harvested once they become commercially valuable?
A tree plantation , also called a tree farm or commercial forest, is a managed tract with uniformly aged trees of one or two genetically uniform species that usually are harvested by clear-cutting as soon as they become commercially valuable. ... Forests provide major ecological and economic services.
Which of the following refers to the temporary or permanent removal of large expanses of forest for agriculture settlements or other uses?
Deforestation is the temporary or permanent removal of large expanses of forest for agriculture, settlements, or other uses.
What term refers to a stand of trees resulting from secondary ecological succession?
Second-Growth Forest . A stand of trees resulting from secondary ecological succession.
What are some ecological benefits of occasional surface fires?
- Burn away flammable ground material such as brush.
- Free up nutrients in slowly-decomposing leaf litter and brush.
- Release seeds from the cones of certain tree species.
- Stimulate germination of certain tree seeds.
- Help to control tree diseases and insects.
What is deforestation and why is it important?
Deforestation not only removes vegetation that is important for removing carbon dioxide from the air, but the act of clearing the forests also produces greenhouse gas emissions. ... In fact, deforestation accounts for nearly 20% of greenhouse gas emissions.
What is the most efficient and least costly way to harvest trees?
Clear-cutting is the most efficient and often the least costly way to harvest trees, but it can do considerable harm to an ecosystem. Strip cutting involves clear-cutting a strip of trees along the contour of the land within a corridor narrow enough to allow natural forest regeneration within a few years.
What percent of old-growth forest remains today?
As human populations grow, forest fragmentation and degradation continues. One result has been the loss of extensive areas of old-growth forest. According to one estimate, stands of century-old forest now account for only 7% of forest cover in the United States (USDA-FS 2000).
What is considered old growth?
The DNR defines old growth forests as forests that have developed over a long period of time , essentially free from catastrophic disturbances. They contain large, old trees of long-lived species that are beyond traditional rotation (harvest) age.
Which tree harvesting method removes whole trees in rows in several cuttings over several years?
Shelterwood cutting also removes all the trees in an area, but does it in stages over several years.
What is secondary succession give an example?
secondary succession, type of ecological succession (the evolution of a biological community's ecological structure) in which plants and animals recolonize a habitat after a major disturbance —such as a devastating flood, wildfire, landslide, lava flow, or human activity (e.g., farming or road or building construction)— ...
What are 2 examples of primary succession?
- Volcanic eruptions.
- Retreat of glaciers.
- Flooding accompanied by severe soil erosion.
- Landslides.
- Nuclear explosions.
- Oil spills.
- Abandonment of a manmade structure, such as a paved parking lot.
What are the two types of succession?
ecological succession, the process by which the structure of a biological community evolves over time. Two different types of succession— primary and secondary —have been distinguished.
What are the negatives of wildfires?
Wildfires release harmful pollutants including particulate matter and toxic gases such as carbon monoxide, nitrogen oxides, and non-methane organic compounds into the atmosphere . Wildfires can cause displacement, stress and anguish to people who have to flee them, beyond those who suffer direct impacts.
Which is a reason that fires can be beneficial to ecosystems quizlet?
How does fire benefit or threaten forest ecosystems? Explain. 1. release minerals and seeds in pinecones and undergrowth, burns away flammable ground material, stimulate the germination of certain seeds, and help control tree diseases and insects .
What are the positive and negative effects of fire?
Fire is often associated with negative impacts on the environment. We usually think of the damage and devastation fire causes to wildlife and vegetation, but a fire event can also be beneficial for our plants and animals. For example, fire: ... encourages new growth that provides food for many animals.
