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Polysiphonia Devoniensis
''Polysiphonia devoniensis'' is a species of marine algae. It is a small red alga in the Division Rhodophyta. It is a species new to science only described recently and first published in 1993.Maggs, C.A. and Hommersand, M.H. 1993. ''Seaweeds of the British Isles Volume 1 Rhodophyta Part 3A Ceramiales.'' The Natural History Museum, London. Description ''Polysiphonia devoniensis'' grows as a tuft of erect, fine, terete branches up to 2.5 cm long and brown in colour. Each branch consists of an axis of central cells surrounded by 4 perixial cells, all of the same length surrounding the central cells and are ecorticate. Trichoblasts are formed near the tips of the branches and rhizoids grow from the periaxial cells of the prostrate axes and trichoblasts from the apex. The rhizoids remain open with the periaxial cells. Reproduction The plants are dioecious. Spermatangia are borne in loose clusters in clusters. The cystocarps are ovoid or round or slightly urceolate with a larg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Algae
Marine primary production is the chemical synthesis in the ocean of organic compounds from atmospheric or dissolved carbon dioxide. It principally occurs through the process of photosynthesis, which uses light as its source of energy, but it also occurs through chemosynthesis, which uses the oxidation or reduction of inorganic chemical compounds as its source of energy. Almost all life on Earth relies directly or indirectly on primary production. The organisms responsible for primary production are called primary producers or autotrophs. Most marine primary production is generated by a diverse collection of marine microorganisms called algae and cyanobacteria. Together these form the principal primary producers at the base of the ocean food chain and produce half of the world's oxygen. Marine primary producers underpin almost all marine animal life by generating nearly all of the oxygen and food marine animals need to exist. Some marine primary producers are also ecosystem en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
