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Semi-arid lands, which stretch across 15.2 percent of the Earth’s land surface, have an aridity index of 0.2–0.5. Annual rainfall in these areas tends to be around 500-800 millimeters, and the presence of dry gale-force winds and very high air temperatures keeps evaporation rates high. Because there is not enough vegetation for stationary ...
Distribution of forests and other land uses. Of the world’s 6.1 billion hectares of drylands, the assessment classified 18 percent as forest and 10 percent as other wooded land. The remaining 71 percent was classified as other land, comprising predominantly barren land, such as bare soil and rock (28 percent of total dryland area), grasslands ...
Drylands refer to land areas where the mean annual precipitation (P) is less than two thirds of potential evapotranspiration (PET = potential evaporation from soil plus transpiration by plants), excluding polar regions and some high mountain areas which meet this criterion but have completely different ecological characteristics.
9 de nov. de 2021 · These drylands are at risk of desertification. In this Review, the changes observed in China’s drylands are synthesized, with a focus on their drivers and the effects of 13 large-scale land ...
A place that receives less than 10 inches (25 centimeters) of rain per year is considered a desert. Deserts are part of a wider class of regions called drylands. These areas exist under a ...
Drylands contain about half of New Zealand's most threatened plant species. There is a very high diversity of native herbs, sub-shrubs and grasses. Exotic plants species are often seen such as mouse-ear hawkweed and sweet brier. The animals in drylands are mostly lizards and invertebrates. Drylands are also important habitats for birds, such as ...
can preserve drylands biodiversity, restore ecosystem functions, and halt land degradation. What is the issue? Drylands are places of water scarcity, where rainfall may be limited or may only be abundant for a short period. They experience high mean temperatures, leading to high rates of water loss to evaporation and transpiration.
