2025年1月17日 · Desert, any large, extremely dry area of land with sparse vegetation. It is one of Earth’s major types of ecosystems, supporting a community of plants and animals specially adapted to the harsh environment.

2025年1月17日 · The arid conditions of the major desert areas result from their position in subtropical regions to either side of the moist equatorial belt. The atmospheric circulation pattern known as the Hadley cell plays an important role in desert climate.

2025年1月17日 · Desert - Adaptation, Ecosystems, Communities: Desert plants and animals have many peculiar adaptations that enable them to survive long periods of moisture shortage and to take maximal advantage of short, infrequent wet periods.

When people think of a desert, they usually think of a sandy, hot, and dry place. But there are other types of deserts as well. A desert is any large region that gets very little rain each year. Very few plants or animals live in desert areas.

2024年12月28日 · Sahara, largest desert in the world. Filling nearly all of northern Africa, it measures approximately 3,000 miles (4,800 km) from east to west and between 800 to 1,200 miles from north to south and has a total area of some 3,320,000 square miles (8,600,000 square km).

2025年1月17日 · Desert - Flora, Fauna, Ecosystems: In most cases floristic links among desert regions are indicated by the presence of related species; it is unusual for identical species to be found in more than one region, except where they have been introduced by humans.

Differences in latitude, elevation, climate, topography, vegetation, soil, and human use have allowed the North American Desert to be subdivided into regions of cold mid-latitude and hot mid-latitude desert.

desert, Large, extremely dry area of land with fairly sparse vegetation. It is one of the Earth’s major types of ecosystems. Areas with a mean annual precipitation of 10 in. (250 mm) or less are generally considered deserts.

More than half of desert animals live at least part of the time underground, where it is cooler and more humid. Another strategy is migration: many birds and other desert animals survive by regularly moving to areas that have recently received rain.

The spread or encroachment of a desert environment into a nondesert region is a process known as desertification. This process results from a number of factors, including changes in climate and the influence of human activities.