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  2. Ecological efficiency - Wikipedia

    en.wikipedia.org/wiki/Ecological_efficiency

    Edible kilocalories produced from kilocalories of energy required for cultivation are: 18.1% for chicken, 6.7% for grass-fed beef, 5.7% for farmed salmon, and 0.9% for shrimp. In contrast, potatoes yield 123%, corn produce 250%, and soy results in 415% of input calories converted to calories able to be utilized by humans. [ 4 ]

  3. Water-use efficiency - Wikipedia

    en.wikipedia.org/wiki/Water-use_efficiency

    Water-use efficiency is also a much studied trait in Plant ecology, where it has been used already in the early 20th century to study the ecological requirements of Herbaceous plants [12] or forest trees, [13] and is still used today, for example related to a drought-induced limitation of tree growth [14]

  4. Productivity (ecology) - Wikipedia

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

    The formula to calculate net ecosystem production is NEP = GPP - respiration (by autotrophs) - respiration (by heterotrophs). [22] The key difference between NPP and NEP is that NPP focuses primarily on autotrophic production, whereas NEP incorporates the contributions of other aspects of the ecosystem to the total carbon budget.

  5. Redfield ratio - Wikipedia

    en.wikipedia.org/wiki/Redfield_ratio

    For his 1934 paper, Alfred Redfield analyzed nitrate and phosphate data for the Atlantic, Indian, Pacific oceans and Barents Sea. [1] As a Harvard physiologist, Redfield participated in several voyages on board the research vessel Atlantis, analyzing data for C, N, and P content in marine plankton, and referenced data collected by other researchers as early as 1898.

  6. Ecological stoichiometry - Wikipedia

    en.wikipedia.org/wiki/Ecological_stoichiometry

    The difference, or mismatch, between the elemental demands of organisms and the elemental composition of resources leads to an elemental imbalance. Consider termites, which have a tissue carbon:nitrogen ratio (C:N) of about 5 yet consume wood with a C:N ratio of 300–1000. Ecological stoichiometry primarily asks:

  7. Biodynamic wine - Wikipedia

    en.wikipedia.org/wiki/Biodynamic_wine

    Biodynamic wines are wines made employing the pseudo-scientific methods called biodynamic both to grow the fruit and during the post-harvest processing. Biodynamic wine production uses organic farming methods (e.g., employing compost as fertilizer and avoiding most pesticides) while also employing soil supplements prepared according to Rudolf Steiner's formulas, following a planting calendar ...

  8. Ecohydrology - Wikipedia

    en.wikipedia.org/wiki/Ecohydrology

    Conceptual model describing the mechanisms of water flow attenuation within a beaver wetland with an unconfined floodplain. Ecohydrology (from Greek οἶκος, oikos, "house(hold)"; ὕδωρ, hydōr, "water"; and -λογία, -logia) is an interdisciplinary scientific field studying the interactions between water and ecological systems.

  9. Indicator value - Wikipedia

    en.wikipedia.org/wiki/Indicator_value

    Indicator value is a term that is used in the ecology of plants for two different indices. The older usage of the term refers to Ellenberg's indicator values from 1974, which are based on a simple ordinal classification of plants according to the position of their realized ecological niche along an environmental gradient. [1]

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