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Autumn in the Driftless Area of Cross Plains, Wisconsin. The Driftless Area, also known as Bluff Country and the Paleozoic Plateau, is a topographic and cultural region in the Midwestern United States [1] that comprises southwestern Wisconsin, southeastern Minnesota, northeastern Iowa, and the extreme northwestern corner of Illinois.
The region's once-prosperous fishing industry has been devastated, bringing unemployment and economic hardship. The water from the diverted Syr Darya river is used to irrigate about two million hectares (5,000,000 acres) of farmland in the Ferghana Valley. [13] The Aral Sea region is heavily polluted, with consequent serious public health problems.
The W National Park (French: Parc national du W) [1] or W Regional Park (French: W du Niger) is a major national park in West Africa around a meander in the Niger River shaped like the letter W (French: double v). The park includes areas of the three countries Niger, Benin and Burkina Faso, and is governed by the three governments.
The refuge is 19,286,722 acres (78,050.59 km 2) of the Alaska North Slope region, with a northern coastline and vast inland forest, taiga, and tundra regions. [1] ANWR is the largest national wildlife refuge in the country, slightly larger than the Yukon Delta National Wildlife Refuge. The refuge is administered from offices in Fairbanks.
It is greater in the tropics as a result of the warm climate and high primary productivity in the region near the equator. Tropical forest ecosystems cover less than one-fifth of Earth's terrestrial area and contain about 50% of the world's species. [2] There are latitudinal gradients in species diversity for both marine and terrestrial taxa. [3]
A shift of 1 or 100% (darker colours) indicates that the region has fully moved into a completely different biome zone type. [1] Climate change is already now altering biomes, adversely affecting terrestrial and marine ecosystems. [2] [3] Climate change represents long-term changes in temperature and average weather patterns.
Sri Lanka's mangrove ecosystem spans over 7,000 hectares and played a vital role in buffering the force of the waves in the 2004 Indian Ocean tsunami. [178] The island is rich in minerals such as ilmenite , feldspar , graphite , silica , kaolin , mica and thorium .