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  2. Ecological unit - Wikipedia

    en.wikipedia.org/wiki/Ecological_unit

    Ecological units refer to specific levels or degrees of organization within ecological systems. The units that are most commonly used and discussed within ecological systems are those at the levels of individuals, populations , communities , and ecosystems . [ 1 ]

  3. Biological organisation - Wikipedia

    en.wikipedia.org/wiki/Biological_organisation

    Ecological levels: Organism: The basic living system, a functional grouping of the lower-level components, including at least one cell Population: Groups of organisms of the same species: Guild: Interspecific groups of organisms carrying the same ecological function (i.e. herbivores). Community (or biocoenosis)

  4. List of countries by ecological footprint - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    This is a list of countries by ecological footprint. The table is based on data spanning from 1961 to 2013 from the Global Footprint Network's National Footprint Accounts published in 2016. Numbers are given in global hectares per capita. The world-average ecological footprint in 2016 was 2.75 global hectares per person

  5. Minimum viable population - Wikipedia

    en.wikipedia.org/wiki/Minimum_viable_population

    This term is commonly used in the fields of biology, ecology, and conservation biology. MVP refers to the smallest possible size at which a biological population can exist without facing extinction from natural disasters or demographic, environmental, or genetic stochasticity. [1]

  6. Ecology - Wikipedia

    en.wikipedia.org/wiki/Ecology

    The largest scale of ecological organization is the biosphere: the total sum of ecosystems on the planet. ... Population ecology studies the dynamics of species ...

  7. List of countries by population (United Nations) - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    Statistical subregions as defined by the United Nations Statistics Division [1]. This is the list of countries and other inhabited territories of the world by total population, based on estimates published by the United Nations in the 2024 revision of World Population Prospects.

  8. Population ecology - Wikipedia

    en.wikipedia.org/wiki/Population_ecology

    Population ecology is a sub-field of ... it is possible to calculate the population size that produces the largest ... alters conceptions of the organization and ...

  9. Community (ecology) - Wikipedia

    en.wikipedia.org/wiki/Community_(ecology)

    A bear with a salmon. Interspecific interactions such as predation are a key aspect of community ecology.. In ecology, a community is a group or association of populations of two or more different species occupying the same geographical area at the same time, also known as a biocoenosis, biotic community, biological community, ecological community, or life assemblage.