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Tehuantepec Canyon and Plain with Low Tropical Deciduous Forest and Low Thorn Forest 14.5.2: South Pacific Hills and Piedmonts with Low Tropical Deciduous Forest 14.6: Sierra and Plains of El Cabo 14.6.1: Los Cabos Plains and Hills with Low Tropical Deciduous Forest and Xeric Shrub 14.6.2: La Laguna Mountains with Oak and Conifer Forests 15
The vegetation of the area is less diverse and includes oak, hickory, loblolly, and shortleaf pines. The Ozark and Ouachita-Appalachian Forests region is an area mostly consisting of hills and low mountains, with some wild valleys that make up the 518,690 square kilometres (200,270 sq mi) of land.
A myth has developed that prior to European culture the New World was a pristine wilderness. In fact, the vegetation conditions that the European settlers observed were changing rapidly because of aboriginal depopulation. As a result, canopy closure and forest tree density were increasing throughout the region. [6]
The United States is part of North America. The environment of the United States comprises diverse biotas, climates, and geologies. This diversity leads to a number of different distinct regions and geographies in which human communities live. This includes a rich variety of species of animals, fungi, plants and other organisms.
The Tropical Wet Forests ecoregion in North America includes the southern tip of the Florida Peninsula in the United States; within Mexico, the Gulf Coastal Plain, the western and southern part of the Pacific Coastal Plain, most of the Yucatán Peninsula and the lowlands of the Chiapas Sierra Madre, which continue south to Central and South ...
The most heavily forested regions of the U.S. are Maine, New Hampshire, American Samoa, the Northern Mariana Islands and West Virginia; the least heavily forested regions are North Dakota, Nebraska, and South Dakota. [2] The U.S. had a 2018 Forest Landscape Integrity Index mean score of 6.65/10, ranking it 67th globally out of 172 countries. [6]
Plants in these deserts are brush and scrub, adapted to the low rainfall. Common plant species include creosote bush, blackbrush, greasewood, saltbush, big sagebrush, low sagebrush, and shadscale. [6] Higher elevations have more precipitation, which allows drought-resistant trees to grow, such as western juniper and pinyon pine. [6]
The adversity of soil and climatic conditions proves to low production levels, as well as little biomass accumulation due to slow rates of nutrient release in cold and wet soils, specifically as a result of limited nitrogen and phosphorus (Nadelhoffer et al. 1996) Additionally, there are low temperatures and strong winds in the tundra causing most vegetation to be dominated by woody plants ...