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The Trees of North America. For the purposes of this category, "North America" is defined in accordance with the World Geographical Scheme for Recording Plant Distributions (WGSRPD), which calls it Northern America, namely as one of the nine "botanical continents". It includes the following regions:
Once one of the largest ecosystems in North America, from Virginia south to Florida and west to Texas, it now occupies less than a quarter of the original range. Degradation of the ecosystem is partially due to excessive timber harvesting, urbanization, and fire exclusion. Although the ecosystem is heavily fragmented at present, it still ...
Flowering big bluestem, a characteristic tallgrass prairie plant. The tallgrass prairie is an ecosystem native to central North America.Historically, natural and anthropogenic fire, as well as grazing by large mammals (primarily bison) provided periodic disturbances to these ecosystems, limiting the encroachment of trees, recycling soil nutrients, and facilitating seed dispersal and germination.
In addition, no trees survive on any of the subantarctic islands near the peninsula. [citation needed] Trees growing along the north shore of the Beagle Channel, 55°S. Southern Rata forests exist on Enderby Island and Auckland Islands (both 50°S) and these grow up to an elevation of 370 metres (1,200 ft) in sheltered valleys. These trees ...
Settlement of "America's breadbasket" led to ecological destruction. Widespread agriculture led to the near-complete extermination of the American bison in the late 1800s and the reduction of the tallgrass prairie to less than 1% of its former extent. [2] The plains are now largely agricultural, with large ranches and farms.
The Great Plains Ecoregion; Flora of the Great Plains (North America) Great Plains—related topics; Temperate grasslands, savannas, and shrublands in the United States — biome's ecoregions in the U.S. List of ecoregions in the United States (EPA) List of ecoregions in the United States (WWF) — Region 109 on the map
Pinus ponderosa, commonly known as the ponderosa pine, [3] bull pine, blackjack pine, [4] western yellow-pine, [5] or filipinus pine, [6] is a very large pine tree species of variable habitat native to mountainous regions of western North America. It is the most widely distributed pine species in North America.
Natural surface fire patterns are especially important in pine reproduction. [6] Biotic factors affecting forests take the form of fungal outbreaks in addition to mountain pine beetle and bark beetle infestations. [15] These beetles are particularly prevalent in North America and kill trees by clogging their vascular tissue. [14]