A phase in forest development characterized by a multi-layered structure, old climax tree species, snags, and large amounts of coarse woody debris.
A forest stand usually at least 180-220 years old with moderate to high canopy closure; a multilayered, multispecies canopy dominated by large overstory trees; high incidence of large trees, some with broken tops and other indications of old and decaying wood (decadence); numerous large snags; and heavy accumulations of wood, including large logs on the ground. FEMAT
a wooded area, usually greater than 200 years of age, that has never been altered or harvested by humans. An old-growth forest often has large individual trees, a multi-layered crown canopy, and a significant accumulation of coarse woody debris including snags and fallen logs.
a post-rotational forest.
a forest that has not been logged where the trees are at least 150 years old. Some of the features of an old-growth forest are trees with large crowns; gaps in the canopy from fallen trees; and remains of dead trees in the form of standing snags and rotting logs, which slowly decompose to enrich and thicken the forest floor.
Old single story forest – single canopy layer consisting of large or old trees. Understory trees are often absent, or present in randomly spaced patches. It generally consists of widely spaced, shade-intolerant species, such as ponderosa pine and western larch, and high frequency fire regimes. Old multi-story forest - a forest stand with moderate to high canopy closure—a multi-leveled and multi-species canopy dominated by large overstory trees; high incidence of large trees, some with broken tops and other indications of old and decaying wood; numerous large snags; and heavy accumulations of wood, including large logs on the ground.
a wooded area that has no evidence of harvest or alteration by humans. An old-growth forest often has large individual trees, a multi-layered crown canopy, and a significant accumulation of large woody material, including snags and fallen logs.
Uncut, virgin forest containing trees that are often hundreds, sometimes thousands, of years old. Examples include forests of Douglas fir, Western hemlock, giant sequoia, and coastal redwoods in the Western United States.
the scientific definition adopted by the Regional Forest Agreements and used for Australia's reporting commitments under the international ‘Montreal Process' is “Ecologically mature forests where the effects of disturbances are now negligible.
A forest dominated by mature or overmature trees that has not been significantly influenced by human activity. The stand may contain treesof different ages and various species of vegetation. Vieille forêt (ou de première venue) ; Forêt anciennne
a forest containing large, long-lived trees, large standing dead trees, numerous logs lying about the forest floor, and multiple canopies created by the crowns of trees of various ages.
A mature forest, dominated by long-lived species but also including younger trees, with a complex physical structure that has multiple layers in the canopy, large trees, and many large dead standing trees and dead logs.
A mature forest, characterized by great age and many large and very old trees, with a complex physical structure.
n: Virgin and old, second growth forests containing trees that are often hundreds, sometimes thousands, of years old. These are the richest forest biomes with the widest arrays of niche microhabitats and the broadest biodiversity, especially in the tropics.