What is the difference between old-growth and secondary growth?

What is the difference between old-growth and secondary growth?

The open canopy structure of old-growth caused by older trees falling down allows for light to reach the forest floor and provide new growing conditions for younger trees and plants. The closed canopy of second growth does not allow for much light to reach the ground, leaving the area homogenous and sparse.

What is the difference between a tree plantation and a second growth forest?

Second-growth forest: A stand of trees resulting from secondary ecological succession. 3. Tree plantation: A managed forest containing only one or two species of trees that are all of the same age.

Is there any old-growth forest left?

Across the country, there are still groves of old-growth forests deep within a wilderness valley, protected in a recreational area or even in someone's backyard.

What percent of old-growth forest remains today?


What does old-growth forest mean?

The definition reads, in part: “Old- growth forests are ecosystems distinguished by old trees and related structural attributes…that may include tree size, ac- cumulations of large dead woody material, number of canopy layers, species composition, and ecosystem function.” Most scientists would now include vertical and ...

Are old-growth forests protected?

Old-growth forests need protection wherever they are found, and regardless of size. These forests, in turn protect us and other life forms in numerous ways. They safely store carbon in the soil and vegetation in this time of global warming.

Where is the largest old growth forest in the US?

Tongass National Forest

How old are old growth trees?

To be considered old growth, these forests are at least 120 years old or have an average tree diameter greater than 10 inches. However, many trees are at least 200 years old, and commonly more than 400 years old. In one old growth forest, researchers found a cedar tree that was nearly 600 years old.

What animals Cannot get cancer?

Bowhead whales can live to 200 and they don't get cancer At the other end of the scale, there are animals that very rarely get cancer. Bowhead whales are the longest living mammals. In May 2007, a bowhead whale caught off the Alaskan coast was found to have the head of a harpoon buried in its blubber.

What is the average life span of a tree?

A recent USDA paper analyzing tree life expectancy in urban areas found the typical street tree lived between 19 and 28 years. To compare, the ideal life span of a white oak is 600 years and the average life span of a red maple can be between 75 to 150 years in the Illinois wilds.

Can plants get drunk?

Can plants get drunk? No, plants can't get drunk. When you get drunk, the ethanol from alcohol gets to the brain from the bloodstream and it affects your nervous system ability to send/receive information. Plants lack the nervous system and don't have a brain, so they can't get drunk.

Will vodka kill my plant?

Hard liquors, such as vodka and whiskey, may be diluted and applied to plants to restrict plant growth. ... The sugar content of beer and wine encourages bacterial and fungal growth, which will damage or kill the plant.

Do plants like alcohol?

Why does booze stunt plant growth? ... "We think it simply might be water stress, that is, the alcohol makes it more difficult for the plant to absorb water, so the plant suffers a slight lack of water, enough to reduce leaf and stem growth, but not enough to affect flower size or flower longevity."