The ecozone , kingdom , biogeographic zone is a unit of biogeographic separation of the Earth’s surface of the highest level, based on the historical and evolutionary distribution of the distribution pattern of plants and animals. Ecozones represent large areas of the earth's surface where flora and fauna developed in relative isolation over a long period of time, separated from each other by large features of the relief, such as the ocean and large deserts or mountain ranges , which created barriers to the migration of animals and plants. Ecozones correspond to floristic zoning in botany or zoogeographic regions in zoology . In other words, they are plants and animals within a region separated by geographical barriers.
Ecozones are characterized by a special evolutionary history of plants and animals living within them. As a rule, within the ecozone, flora and fauna are characterized by a certain uniformity. Biomes are characterized by the appearance of menopause vegetation, regardless of the evolutionary origin of some species of animals and plants. Each ecozone can contain a large number of diverse biomes. The tropical rain forests of Central America , for example, may be similar to the tropical rain forests of New Guinea in terms of the nature of vegetation, climate , soil , etc., however, these forests are inhabited by plants and animals of different evolutionary origin.
The distribution patterns of animals and plants over the Earth’s eco-zones are largely determined by plate tectonics , that is, the distribution of land masses.
The term "ecozone" itself is a relatively recent concept, instead of which, in the same sense, the terms "kingdom", "region", "biogeographic zone" and others have traditionally been used.
WWF
Ecozones are based primarily on biogeographic areas as defined by Pielou (1979) and Uddward (1975). A group of biologists working at the World Wildlife Fund (WWF) has developed a system of eight eco-zones within the classification of 800 terrestrial ecoregions .
- Nearctic - 22.9 million km² (includes most of North America )
- Palearctic - 54.1 million km² (includes most of Eurasia and North Africa )
- Afrotropic - 22.1 million km² (includes sub-Saharan Africa )
- Indomali zone - 7.5 million km ² (includes Afghanistan , Pakistan , Hindustan Peninsula and Southeast Asia )
- Australasia - 7.7 million km² (includes Australia , New Guinea and nearby islands). The northern boundary of this zone is the Wallas Line .
- Neotropics - 19.0 million km ² (includes South America and the Caribbean )
- Oceania - 1.0 million km² (includes Polynesia , Fiji and Micronesia )
- Antarctica - 0.3 million km² (includes Antarctica ).
The WWF scheme as a whole is similar to another widespread separation, the Uwardi system, the main difference between them is the separation of the Australasian ecozone from the Antarctic, Oceanian and Indomalai ecozone. Under the WWF system, the Australasian ecozone includes Australia , Tasmania , Wallacea Islands, New Guinea , Eastern Melanesian Islands , New Caledonia and New Zealand Islands. According to the Udwardi system, the Australasian ecozone includes only Australia and Tasmania, Wallacea belongs to the Indomalayan ecozone, New Guinea and New Caledonia to Oceanian, New Zealand to the Antarctic.
See also
- Faunistic zoning