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The largest cells, Chattonella marina, produced up to 100 times more superoxide than most other marine algae (see figure in [49]). The authors suggest that since ROS is produced as a byproduct of metabolism, and larger cells are more metabolically active than smaller cells, it follows that larger cells should produce more ROS.
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 ocean produces about half of the world's oxygen and stores 50 times more carbon dioxide than the atmosphere. [17] Prochlorococcus, an influential bacterium which produces much of the world's oxygen. Among the phytoplankton are members from a phylum of bacteria called cyanobacteria. Marine cyanobacteria include the smallest known ...
In 1965, the Russian CELSS experiment BIOS-3 determined that 8 m 2 of exposed Chlorella could remove carbon dioxide and replace oxygen within the sealed environment for a single human. The algae were grown in vats underneath artificial light.
First, in diatoms, and likely some other algae, there is a urea cycle. [97] [98] [99] The long-known function of the urea cycle in animals is to excrete excess nitrogen produced by amino acid Catabolism; like photorespiration, the urea cycle had long been considered a waste pathway.
The green surface indicates algae growth seen from the Lake Hopatcong Foundation's Floating Classroom. Sept. 19, 2019. "Once the oxygen gets low, the bond breaks and the phosphorus is released ...
Oxygen concentrations in the atmosphere remained around or below 0.001% of today's level until 2.4 Ga ago (the Great Oxygenation Event). [178] The rise in oxygen may have caused a fall in the concentration of atmospheric methane, and triggered the Huronian glaciation from around 2.4 to 2.1 Ga ago. In this way, cyanobacteria may have killed off ...
The largest and most complex marine algae are called seaweeds. In contrast, the most complex freshwater forms are the Charophyta, a division of green algae which includes, for example, Spirogyra and stoneworts. Algae that are carried passively by water are plankton, specifically phytoplankton.