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Proportion and distribution of global forest area by climatic domain, 2020 [1] A forest is an ecosystem characterized by a dense community of trees. [2] Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function.
The forest floor, the bottom-most layer, receives only 2% of the sunlight. Only plants adapted to low light can grow in this region. Away from riverbanks , swamps and clearings, where dense undergrowth is found, the forest floor is relatively clear of vegetation because of the low sunlight penetration.
Forest ecology is the scientific study of the interrelated patterns, processes, flora, fauna, funga, and ecosystems in forests. [1] The management of forests is known as forestry , silviculture , and forest management .
It concluded that the forest is on the brink of [vague] being turned into savanna or desert, with catastrophic consequences for the world's climate. [citation needed] A study published in Nature Communications in October 2020 found that about 40% of the Amazon rainforest is at risk of becoming a savanna-like ecosystem due to reduced rainfall. [130]
An evergreen forest is a forest made up of evergreen trees. They occur across a wide range of climatic zones, and include trees such as conifers and holly in cold climates, eucalyptus , live oak , acacias , magnolia , and banksia in more temperate zones, and rainforest trees in tropical zones.
Forest canopies have unique structural and ecological complexities and are important for the forest ecosystem. They are involved in critical functions such as rainfall interception, light absorption, nutrient and energy cycling, gas exchange, and providing habitat for diverse wildlife. [ 11 ]
A "natural bonsai" in the Mount Hamiguitan National Park in the Philippines, a UNESCO World Heritage Site An elfin forest in Sumatra's Gunung Leuser National Park. Dwarf forest, elfin forest, or pygmy forest is an uncommon ecosystem featuring miniature trees, inhabited by small species of fauna such as rodents and lizards.
The original tropical rainforests, which covered the planet's land surface, were the type of flora that covered Earth.Other canopy forests expanded north-south of the equator during the Paleogene epoch, around 40 million years ago, as a result of the emergence of drier, cooler climates.
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