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Between 2010 and 2020, the US forests increased 0.03% annually, according to FAO (Food and Agriculture Organization of the United Nations). [a] Native Americans cleared millions of acres of forest for many reasons, including hunting, farming, berry production, and building materials. [1]
Biodiversity loss has bad effects on the functioning of ecosystems. This in turn affects humans, [45] because affected ecosystems can no longer provide the same quality of ecosystem services, such as crop pollination, cleaning air and water, decomposing waste, and providing forest products as well as areas for recreation and tourism. [122]
In the past 50 years, the world's human population has doubled, [20] [12] per capita gross domestic product has quadrupled, [21] and biodiversity has suffered a catastrophic decline. [22] Most notably, tropical forests have been cleared for cattle pastures in South America and for oil-palm plantations in Southeast Asia. [23]
The tallgrass prairies of North America, on the other hand, have less than 3% of natural ... years that habitat fragmentation has caused a decrease in biodiversity ...
Since 1990, it is estimated that some 420 million hectares of forest have been lost through conversion to other land uses, although the rate of deforestation has decreased over the past three decades. Between 2015 and 2020, the rate of deforestation was estimated at 10 million hectares per year, down from 16 million hectares per year in the 1990s.
Experts predict that if 20-25% of the Amazon is lost, it could go into irretrievable decline but even before this year’s wildfires, up to 17% of the Amazon rainforest was estimated to have ...
The diversity of species and genes in ecological communities affects the functioning of these communities. These ecological effects of biodiversity in turn are affected by both climate change through enhanced greenhouse gases, aerosols and loss of land cover [citation needed], and biological diversity, causing a rapid loss of biodiversity and extinctions of species and local populations.
From 1980 to 2012 in the US, while population increased by 38%, the small ruminant inventory decreased by 42%, the cattle-and-calves inventory decreased by 17%, and methane emissions from livestock decreased by 18%; [70] yet despite the reduction in cattle numbers, US beef production increased over that period.