Friday, 11 September 2015

bosque fotos

forest

noun
  1. 1.
    a large area covered chiefly with trees and undergrowth.
    "a pine forest"
    synonyms:wood(s), woodland, trees, tree plantation, plantation; More
  2. 2.
    a large number or dense mass of vertical or tangled objects.
    "a forest of high-rise apartments"
verb
  1. 1.
    cover (land) with forest; plant with trees.
    "a forested hillside"


A forest is a large area of land covered with trees or other woody vegetation. Hundreds of more precise definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing and ecological function.According to the widely-used United Nations Food and Agriculture Organization definition, forests covered an area of four billion hectares (15 million square miles) or approximately 30 percent of the world's land area in 2006.









Forests are the dominant terrestrial ecosystem of Earth, and are distributed across the globe. Forests account for 75% of the gross primary productivity of the Earth's biosphere, and contain 80% of the Earth's plant biomass.






Forests at different latitudes form distinctly different ecozones: boreal forests near the poles tend to consist of evergreens, while tropical forests near the equator tend to be distinct from the temperate forests at mid-latitude. The amount of precipitation and the elevation of the forest also affects forest composition.








Human society and forests influence each other in both positive and negative ways. Forests provide ecosystem services to humans and serve as tourist attractions. Forests can also impose costs, affect people's health, and interfere with tourist enjoyment. Human activities, including harvesting forest resources, can negatively affect forest ecosystems.




Although forest is a term of common parlance, there is no universally recognised precise definition, with more than 800 definitions of forest used around the world.Although a forest is usually defined by the presence of trees, under many definitions an area completely lacking trees may still be considered a forest if it grew trees in the past, will grow trees in the future, or was legally designated as a forest regardless of vegetation type. 




































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