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  2. Ecosystem ecology - Wikipedia

    en.wikipedia.org/wiki/Ecosystem_ecology

    Ecosystem services are ecologically mediated functional processes essential to sustaining healthy human societies. [6] Water provision and filtration, production of biomass in forestry, agriculture, and fisheries, and removal of greenhouse gases such as carbon dioxide (CO 2) from the atmosphere are examples of ecosystem services essential to public health and economic opportunity.

  3. Environmental impacts of animal agriculture - Wikipedia

    en.wikipedia.org/wiki/Environmental_impacts_of...

    An important aspect of energy use in livestock production is the energy consumption that the animals contribute. Feed Conversion Ratio is an animal's ability to convert feed into meat. The Feed Conversion Ratio (FCR) is calculated by taking the energy, protein, or mass input of the feed divided by the output of meat provided by the animal.

  4. Green job - Wikipedia

    en.wikipedia.org/wiki/Green_job

    The Green Jobs Act of 2007 (H.R. 2847), introduced by Reps. Hilda Solis (D-CA) and John Tierney (D-MA), "authorized up to $125 million in funding to establish national and state job training programs, administered by the U.S. Department of Labor, to help address job shortages that are impairing growth in green industries, such as energy ...

  5. Marine biogeochemical cycles - Wikipedia

    en.wikipedia.org/wiki/Marine_biogeochemical_cycles

    Energy flows directionally through ecosystems, entering as sunlight (or inorganic molecules for chemoautotrophs) and leaving as heat during the many transfers between trophic levels. However, the matter that makes up living organisms is conserved and recycled.

  6. Ecosystem - Wikipedia

    en.wikipedia.org/wiki/Ecosystem

    Raymond Lindeman took these ideas further to suggest that the flow of energy through a lake was the primary driver of the ecosystem. Hutchinson's students, brothers Howard T. Odum and Eugene P. Odum, further developed a "systems approach" to the study of ecosystems. This allowed them to study the flow of energy and material through ecological ...

  7. Biogeochemical cycle - Wikipedia

    en.wikipedia.org/wiki/Biogeochemical_cycle

    Generalized biogeochemical cycle [2] Simplified version of the nitrogen cycle. Energy flows directionally through ecosystems, entering as sunlight (or inorganic molecules for chemoautotrophs) and leaving as heat during the many transfers between trophic levels. However, the matter that makes up living organisms is conserved and recycled.

  8. Wildlife conservation - Wikipedia

    en.wikipedia.org/wiki/Wildlife_conservation

    An example of how this may happen is through by-catch.These new species will outcompete the native species and take over, therefore causing the local or global extinction of a species. [32] Due to the fittest animals in the species being hunted or poached, the less fit organisms will mate, causing less fitness in the generations to come.

  9. Ecology - Wikipedia

    en.wikipedia.org/wiki/Ecology

    Radiant energy from the sun generates heat, provides photons of light measured as active energy in the chemical reactions of life, and also acts as a catalyst for genetic mutation. [ 112 ] [ 113 ] [ 173 ] Plants, algae, and some bacteria absorb light and assimilate the energy through photosynthesis .

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