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  2. Ecological pyramid - Wikipedia

    en.wikipedia.org/wiki/Ecological_pyramid

    Ecological pyramids begin with producers on the bottom (such as plants) and proceed through the various trophic levels (such as herbivores that eat plants, then carnivores that eat flesh, then omnivores that eat both plants and flesh, and so on). The highest level is the top of the food chain. Biomass can be measured by a bomb calorimeter.

  3. Food plot - Wikipedia

    en.wikipedia.org/wiki/Food_plot

    Food plot in Germany. A food plot is a planted area set aside to act as a supplementary food source for wildlife. The term was coined by the U.S. hunting and outdoor industries and food plots are most commonly planted for game species. Food plot crops generally consist of but are not limited to legumes (clovers, alfalfa, beans, etc.), grains ...

  4. Rank abundance curve - Wikipedia

    en.wikipedia.org/wiki/Rank_abundance_curve

    A rank abundance curve or Whittaker plot is a chart used by ecologists to display relative species abundance, a component of biodiversity. It can also be used to visualize species richness and species evenness. It overcomes the shortcomings of biodiversity indices that cannot display the relative role different variables played in their ...

  5. Plot sampling - Wikipedia

    en.wikipedia.org/wiki/Plot_sampling

    In ecology, plot sampling is a widely used method of abundance estimation in which specific areas, or plots, are selected from within a survey region and sampled. This approach allows scientists to make population estimates using statistical techniques such as the Horvitz–Thompson estimator .

  6. Relative species abundance - Wikipedia

    en.wikipedia.org/wiki/Relative_species_abundance

    Frequency histogram (Preston plot): x-axis: logarithm of abundance bins (historically log 2 as a rough approximation to the natural logarithm) y-axis: number of species at given abundance. Rank-abundance diagram (Whittaker plot): x-axis: species list, ranked in order of descending abundance (i.e. from common to rare)

  7. List of countries by arable land density - Wikipedia

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

    Arable density (m² per capita) by country. This is a list of countries ordered by physiological density."Arable land" is defined by the UN's Food and Agriculture Organization, the source of "Arable land (hectares per person)" as land under temporary crops (double-cropped areas are counted once), temporary meadows for mowing or for pasture, land under market or kitchen gardens, and land ...

  8. What Is the Highest Income Level for Food Stamps in 2023? - AOL

    www.aol.com/finance/highest-income-level-food...

    The highest income levels for fiscal year 2023 went into effect on Oct. 1, 2022. SNAP is a federal program that provides food-purchasing assistance to low-income households.

  9. Ecological efficiency - Wikipedia

    en.wikipedia.org/wiki/Ecological_efficiency

    Out of a total of 28,400 terawatt-hours (96.8 × 10 ^ 15 BTU) of energy used in the US in 1999, 10.5% was used in food production, [3] with the percentage accounting for food from both producer and primary consumer trophic levels. In comparing the cultivation of animals versus plants, there is a clear difference in magnitude of energy efficiency.

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