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  2. File:Lake Erie food web.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Lake_Erie_food_web.pdf

    Lake Erie food web based on: (2003). "Compartments revealed in food-web structure". "Compartments revealed in food-web structure". Nature 426 (6964): 282–285.

  3. File:Lake Superior Food Web.pdf - Wikipedia

    en.wikipedia.org/.../File:Lake_Superior_Food_Web.pdf

    Lake Superior food web based on: (2003). "Compartments revealed in food-web structure". "Compartments revealed in food-web structure". Nature 426 (6964): 282–285.

  4. Food web - Wikipedia

    en.wikipedia.org/wiki/Food_web

    A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.

  5. Soil food web - Wikipedia

    en.wikipedia.org/wiki/Soil_food_web

    An example of a topological food web (image courtesy of USDA) [1]. The soil food web is the community of organisms living all or part of their lives in the soil. It describes a complex living system in the soil and how it interacts with the environment, plants, and animals.

  6. Microbial food web - Wikipedia

    en.wikipedia.org/wiki/Microbial_food_web

    The microbial food web refers to the combined trophic interactions among microbes in aquatic environments. These microbes include viruses, bacteria, algae, heterotrophic protists (such as ciliates and flagellates). [1] In aquatic ecosystems, microbial food webs are essential because they form the basis for the cycling of nutrients and energy.

  7. Marine food web - Wikipedia

    en.wikipedia.org/wiki/Marine_food_web

    The pelagic food web, showing the central involvement of marine microorganisms in how the ocean imports nutrients from and then exports them back to the atmosphere and ocean floor. A marine food web is a food web of marine life. At the base of the ocean food web are single-celled algae and other plant-like organisms known as phytoplankton.

  8. Biological roles of the elements - Wikipedia

    en.wikipedia.org/wiki/Biological_roles_of_the...

    Examples include iron, essential to hemoglobin; and magnesium, essential to chlorophyll. Some elements are essential only to certain taxonomic groups of organisms, particularly the prokaryotes. For instance, the lanthanide series rare earths are essential for methanogens. As shown in the following table, there is strong evidence that 19 of the ...

  9. Trace element - Wikipedia

    en.wikipedia.org/wiki/Trace_element

    An essential trace element is a dietary element, a mineral that is only needed in minute quantities for the proper growth, development, and physiology of the organism. [4] The essential trace elements are those that are required to perform vital metabolic activities in organisms. [ 5 ]