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  2. Nutrient cycle - Wikipedia

    en.wikipedia.org/wiki/Nutrient_cycle

    [6] [12] In terms of a food web, a cycle or loop is defined as "a directed sequence of one or more links starting from, and ending at, the same species." [ 13 ] : 185 An example of this is the microbial food web in the ocean, where "bacteria are exploited, and controlled, by protozoa, including heterotrophic microflagellates which are in turn ...

  3. File:Diagram of the water cycle including some human activity ...

    en.wikipedia.org/wiki/File:Diagram_of_the_water...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  4. Marine biogeochemical cycles - Wikipedia

    en.wikipedia.org/wiki/Marine_biogeochemical_cycles

    Since liquid water flows, ocean waters cycle and flow in currents around the world. Since water easily changes phase, it can be carried into the atmosphere as water vapour or frozen as an iceberg. It can then precipitate or melt to become liquid water again. All marine life is immersed in water, the matrix and womb of life itself. [7]

  5. Energy flow (ecology) - Wikipedia

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

    The carbon cycle of a terrestrial ecosystem. [6] Beginning with photosynthesis, water (blue) and carbon dioxide (white) from the air are taken in with solar energy (yellow), and are converted into plant energy (green). [7] 100×10 15 grams of carbon/year fixed by photosynthetic organisms, which is equivalent to 4×10 18 kJ/yr = 4×10 21 J/yr of ...

  6. Slow living - Wikipedia

    en.wikipedia.org/wiki/Slow_living

    Slow living is a lifestyle which encourages a slower approach to aspects of everyday life, [1] involving completing tasks at a leisurely pace. [2] The origins of this lifestyle are linked to the Italian slow food movement, which emphasised traditional food production techniques in response to the emerging popularity of fast food during the ...

  7. River ecosystem - Wikipedia

    en.wikipedia.org/wiki/River_ecosystem

    Water flow can vary between systems, ranging from torrential rapids to slow backwaters that almost seem like lentic systems. The speed or velocity of the water flow of the water column can also vary within a system and is subject to chaotic turbulence, though water velocity tends to be highest in the middle part of the stream channel (known as ...

  8. Carbon cycle - Wikipedia

    en.wikipedia.org/wiki/Carbon_cycle

    The fast or biological cycle can complete within years, moving carbon from atmosphere to biosphere, then back to the atmosphere. The slow or geological cycle may extend deep into the mantle and can take millions of years to complete, moving carbon through the Earth's crust between rocks, soil, ocean and atmosphere. [2]

  9. Ecological succession - Wikipedia

    en.wikipedia.org/wiki/Ecological_succession

    B) Emergent plant life begins to move inward and submerge, filling up the lake. Sediment accumulates as the plants grow and die. Terrestrial plant life increases. C) Sediment fills the lake basin, leaving a swampy center at the surface. Terrestrial plants take over and begin to slowly dry out the damp surface. A hydrosere community