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Aquatic photosynthesis is the occurrence of photosynthesis in the aquatic environment, which includes the freshwater environment and the marine (saltwater) environment. Organisms that perform photosynthesis in the aquatic environment include but are not limited to plants , algae , cyanobacteria , [ 1 ] coral , [ 2 ] phytoplankton (also known as ...
Photoautotrophs are organisms that can utilize light energy from sunlight and elements (such as carbon) from inorganic compounds to produce organic materials needed to sustain their own metabolism (i.e. autotrophy). Such biological activities are known as photosynthesis, and examples of such organisms include plants, algae and cyanobacteria.
Phytoplankton (/ ˌ f aɪ t oʊ ˈ p l æ ŋ k t ə n /) are the autotrophic (self-feeding) components of the plankton community and a key part of ocean and freshwater ecosystems.The name comes from the Greek words φυτόν (phyton), meaning 'plant', and πλαγκτός (planktos), meaning 'wanderer' or 'drifter'.
They can take advantage of different environmental conditions. [4] If a trophic mode is obligate, it is always necessary to sustain growth and maintenance; if facultative, it can be used as a supplemental source. [3] Some organisms have incomplete Calvin cycles, so they are incapable of fixing carbon dioxide and must use organic carbon sources.
Because coccolithophores are photosynthetic organisms, they are able to use some of the CO 2 released in the calcification reaction for photosynthesis. [ 101 ] However, the production of calcium carbonate drives surface alkalinity down, and in conditions of low alkalinity the CO 2 is instead released back into the atmosphere. [ 102 ]
Purple bacteria or purple photosynthetic bacteria are Gram-negative proteobacteria that are phototrophic, capable of producing their own food via photosynthesis. [1] They are pigmented with bacteriochlorophyll a or b , together with various carotenoids , which give them colours ranging between purple, red, brown, and orange.
Photosynthesis is the main means by which plants, algae and many bacteria produce organic compounds and oxygen from carbon dioxide and water (green arrow). 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 .
Rhodopseudomonas palustris – another example – can grow with or without oxygen, use either light, inorganic or organic compounds for energy. [14] Such mixotrophic organisms may dominate their habitat, due to their capability to use more resources than either photoautotrophic or organoheterotrophic organisms. [15]