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  2. Nutrient cycle - Wikipedia

    en.wikipedia.org/wiki/Nutrient_cycle

    The term nutrient recycling appears in a 1964 paper on the food ecology of the wood stork: "While the periodic drying up and reflooding of the marshes creates special survival problems for organisms in the community, the fluctuating water levels favor rapid nutrient recycling and subsequent high rates of primary and secondary production" [47]: 97

  3. Dead zone (ecology) - Wikipedia

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

    It is designed to direct efforts to reduce nutrients in surface water from both point and nonpoint sources in a scientific, reasonable and cost effective manner." [ 66 ] The strategy continues to evolve, using voluntary methods to reduce Iowa's negative contributions through outreach, research, and implementation of nutrient holding practices.

  4. Oligotroph - Wikipedia

    en.wikipedia.org/wiki/Oligotroph

    Most oligotrophs live in lakes where water helps support biochemical processes for growth and survival. [6] Below are some documented examples of oligotrophic environments in Antarctica: Lake Vostok , a freshwater lake which has been isolated from the world beneath 4 km (2.5 mi) of Antarctic ice is frequently held to be a primary example of an ...

  5. Food web - Wikipedia

    en.wikipedia.org/wiki/Food_web

    [55] [56] [57] Bacteria that live in detrital sediments create and cycle nutrients and biominerals. [58] Food web models and nutrient cycles have traditionally been treated separately, but there is a strong functional connection between the two in terms of stability, flux, sources, sinks, and recycling of mineral nutrients. [59] [60]

  6. Trophic state index - Wikipedia

    en.wikipedia.org/wiki/Trophic_state_index

    A water body situated in a nutrient-rich region with high net primary productivity may be naturally eutrophic. Nutrients carried into water bodies from non-point sources such as agricultural runoff, residential fertilisers, and sewage will all increase the algal biomass, and can easily cause an oligotrophic lake to become hypereutrophic. [11 ...

  7. Nutrient - Wikipedia

    en.wikipedia.org/wiki/Nutrient

    A nutrient is a substance used by an organism to survive, grow and reproduce. The requirement for dietary nutrient intake applies to animals, plants, fungi and protists. Nutrients can be incorporated into cells for metabolic purposes or excreted by cells to create non-cellular structures such as hair, scales, feathers, or exoskeletons.