Common diagnostic features of wetlands are hydric soils and hydrophytic vegetation. NRC 1995 Table 1: Excerpts from three wetland definitions distinguishing wetland habitats from other ecosystems ...

Exploring the characteristics of ecosystems and the factors affecting their distribution. This special also looks at the threats they face and considers their impact on an ecosystem's dynamic ...

Hot deserts are found near the tropics of Cancer and Capricorn. The largest hot desert is the Sahara in Africa which spans the whole width of the continent.