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  2. 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.

  3. Essential gene - Wikipedia

    en.wikipedia.org/wiki/Essential_gene

    In yeast, few of the essential genes are duplicated within the genome: 8.5% of the non-essential genes, but only 1% of the essential genes have a homologue in the yeast genome. [ 59 ] In the worm C. elegans , non-essential genes are highly over-represented among duplicates, possibly because duplication of essential genes causes overexpression ...

  4. 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 ...

  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. 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.

  7. Benthic-pelagic coupling - Wikipedia

    en.wikipedia.org/wiki/Benthic-pelagic_coupling

    Benthic-pelagic coupling are processes that connect the benthic zone and the pelagic zone through the exchange of energy, mass, or nutrients. These processes play a prominent role in both freshwater and marine ecosystems and are influenced by a number of chemical, biological, and physical forces that are crucial to functions from nutrient cycling to energy transfer in food webs.

  8. Her daughter's suicide shocked the community. Now, she's ...

    www.aol.com/her-daughters-suicide-shocked...

    Editor’s note: This article discusses suicide and suicidal ideation. If you or someone you know is struggling or in crisis, help is available. Call or text 988 or chat at 988lifeline.org ...

  9. Mineral (nutrient) - Wikipedia

    en.wikipedia.org/wiki/Mineral_(nutrient)

    For example, whether chromium is essential in humans is debated. No Cr-containing biochemical has been purified. The United States and Japan designate chromium as an essential nutrient, [11] [12] but the European Food Safety Authority (EFSA), representing the European Union, reviewed the question in 2014 and does not agree. [13]