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  2. Ecosystem - Wikipedia

    en.wikipedia.org/wiki/Ecosystem

    Ecosystem classifications are specific kinds of ecological classifications that consider all four elements of the definition of ecosystems: a biotic component, an abiotic complex, the interactions between and within them, and the physical space they occupy. Biotic factors of the ecosystem are living things; such as plants, animals, and bacteria ...

  3. Ecosystem ecology - Wikipedia

    en.wikipedia.org/wiki/Ecosystem_ecology

    Ecosystem ecology is an inherently interdisciplinary field of study. An individual ecosystem is composed of populations of organisms, interacting within communities, and contributing to the cycling of nutrients and the flow of energy. The ecosystem is the principal unit of study in ecosystem ecology. Population, community, and physiological ...

  4. Natural environment - Wikipedia

    en.wikipedia.org/wiki/Natural_environment

    An image of the Sahara Desert from satellite. It is the world's largest hot desert and third-largest desert after the polar deserts. The natural environment or natural world encompasses all living and non-living things occurring naturally, meaning in this case not artificial.

  5. Ecology - Wikipedia

    en.wikipedia.org/wiki/Ecology

    Ecology (from Ancient Greek οἶκος (oîkos) 'house', and -λογία ( -logía) 'study of') [A] is the natural science of the relationships among living organisms, including humans, and their physical environment. Ecology considers organisms at the individual, population, community, ecosystem, and biosphere levels.

  6. Ecosystem diversity - Wikipedia

    en.wikipedia.org/wiki/Ecosystem_diversity

    Ecosystem diversity addresses the combined characteristics of biotic properties ( biodiversity) and abiotic properties ( geodiversity ). It is a variation in the ecosystems found in a region or the variation in ecosystems over the whole planet. Ecological diversity includes the variation in both terrestrial and aquatic ecosystems.

  7. Terrestrial ecosystem - Wikipedia

    en.wikipedia.org/wiki/Terrestrial_ecosystem

    Terrestrial ecosystem. Terrestrial ecosystems are ecosystems that are found on land. Examples include tundra, taiga, temperate deciduous forest, tropical rain forest, grassland, deserts. [1] Terrestrial ecosystems differ from aquatic ecosystems by the predominant presence of soil rather than water at the surface and by the extension of plants ...

  8. River ecosystem - Wikipedia

    en.wikipedia.org/wiki/River_ecosystem

    River ecosystems are flowing waters that drain the landscape, and include the biotic (living) interactions amongst plants, animals and micro-organisms, as well as abiotic (nonliving) physical and chemical interactions of its many parts. [1] [2] River ecosystems are part of larger watershed networks or catchments, where smaller headwater streams ...

  9. Aquatic ecosystem - Wikipedia

    en.wikipedia.org/wiki/Aquatic_ecosystem

    Aquatic ecosystem. An estuary mouth and marine coastal waters, part of an aquatic ecosystem. An aquatic ecosystem is an ecosystem found in and around a body of water, in contrast to land-based terrestrial ecosystems. Aquatic ecosystems contain communities of organisms — aquatic life —that are dependent on each other and on their environment.