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  2. Photoautotroph - Wikipedia

    en.wikipedia.org/wiki/Photoautotroph

    Cyanobacteria is the only prokaryotic group that performs oxygenic photosynthesis. Anoxygenic photosynthetic bacteria use PSI- and PSII-like photosystems, which are pigment protein complexes for capturing light. [5] Both of these photosystems use bacteriochlorophyll. There are multiple hypotheses for how oxygenic photosynthesis evolved.

  3. Autotroph - Wikipedia

    en.wikipedia.org/wiki/Autotroph

    Autotrophs possibly evolved into heterotrophs when they were at low H 2 partial pressures where the first form of heterotrophy were likely amino acid and clostridial type purine fermentations. [19] It has been suggested that photosynthesis emerged in the presence of faint near infrared light emitted by hydrothermal vents.

  4. Primary nutritional groups - Wikipedia

    en.wikipedia.org/wiki/Primary_nutritional_groups

    Primary nutritional groups are groups of organisms, divided in relation to the nutrition mode according to the sources of energy and carbon, needed for living, growth and reproduction. The sources of energy can be light or chemical compounds; the sources of carbon can be of organic or inorganic origin.

  5. Terrestrial biological carbon cycle - Wikipedia

    en.wikipedia.org/wiki/Terrestrial_biological...

    Autotrophs, such as trees and other green plants, use photosynthesis to convert carbon dioxide during primary production, releasing oxygen in the process. This process occurs most quickly in ecosystems with high amounts of growth, such as in young forests.

  6. Carbon source (biology) - Wikipedia

    en.wikipedia.org/wiki/Carbon_source_(biology)

    An autotroph is an organism that can convert abiotic sources of energy into energy stored in organic compounds, which can be used by other organisms.Autotrophs produce complex organic compounds (such as carbohydrates, fats, and proteins) using carbon from simple substances such as carbon dioxide, [1] generally using energy from light or inorganic chemical reactions. [2]

  7. Marine primary production - Wikipedia

    en.wikipedia.org/wiki/Marine_primary_production

    Chloroplasts (from the Greek chloros for green, and plastes for "the one who forms" [31]) are organelles that conduct photosynthesis, where the photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules while freeing oxygen from water in plant and algal cells.

  8. Fractionation of carbon isotopes in oxygenic photosynthesis

    en.wikipedia.org/wiki/Fractionation_of_carbon...

    Oxygenic photosynthesis is a metabolic pathway facilitated by autotrophs, including plants, algae, and cyanobacteria. This pathway converts inorganic carbon dioxide from the atmosphere or aquatic environment into carbohydrates, using water and energy from light, then releases molecular oxygen as a product

  9. Phototroph - Wikipedia

    en.wikipedia.org/wiki/Phototroph

    It is a common misconception that phototrophs are obligatorily photosynthetic. Many, but not all, phototrophs often photosynthesize: they anabolically convert carbon dioxide into organic material to be utilized structurally, functionally, or as a source for later catabolic processes (e.g. in the form of starches, sugars and fats).