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Image of the Aral Sea in 1989 (left) and 2014. The Aral Sea is an example of a Collapsed (CO) ecosystem. [1] (image source: NASA)The Red List of Ecosystems was created to carry out assessments of biodiversity at a level of biological organization above species. [2]
An ecosystem (or ecological system) is a system formed by organisms in interaction with their environment. [2]: 458 The biotic and abiotic components are linked together through nutrient cycles and energy flows. Ecosystems are controlled by external and internal factors.
Pages in category "Ecosystems" The following 108 pages are in this category, out of 108 total. This list may not reflect recent changes. ...
This is a list of terrestrial ecoregions as compiled by the World Wildlife Fund (WWF). The WWF identifies terrestrial , freshwater , and marine ecoregions . The terrestrial scheme divides the Earth's land surface into 8 biogeographic realms , containing 867 smaller ecoregions.
Level IV mapping is still underway but is complete across most of the United States. For an example of Level IV data, see List of ecoregions in Oregon and the associated articles. The classification system excludes the U.S. state of Hawaii, which is not part of the North American continent.
List of terrestrial ecoregions (WWF) 867 terrestrial ecoregions. List of marine ecoregions (WWF), 232 marine ecoregions of the coastal and continental shelf areas. List of freshwater ecoregions (WWF), 426 freshwater ecoregions. Lists of ecoregions by country; Lists of ecoregions by continent. List of ecoregions in Africa; List of ecoregions in ...
Terrestrial ecosystems occupy 55,660,000 mi 2 (144,150,000 km 2), or 28.26% of Earth's surface. [5] Major plant taxa in terrestrial ecosystems are members of the division Magnoliophyta (flowering plants), of which there are about 275,000 species, and the division Pinophyta (conifers), of which there are about 500 species.
Lentic ecosystems can be compared with lotic ecosystems, which involve flowing terrestrial waters such as rivers and streams. Together, these two ecosystems are examples of freshwater ecosystems. Lentic systems are diverse, ranging from a small, temporary rainwater pool a few inches deep to Lake Baikal, which has a maximum depth of 1642 m. [10]