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The anoxygenic phototrophic iron oxidation was the first anaerobic metabolism to be described within the iron anaerobic oxidation metabolism. The photoferrotrophic bacteria use Fe 2+ as electron donor and the energy from light to assimilate CO 2 into biomass through the Calvin Benson-Bassam cycle (or rTCA cycle) in a neutrophilic environment (pH 5.5-7.2), producing Fe 3+ oxides as a waste ...
Periodic removal of the algae that has grown inside of an algae scrubber removes nutrients (ammonia, nitrate, phosphate) from the aquarium water, thus providing the needed filtration. An algae scrubber is a water filtering device which uses light to grow algae; in this process, undesirable chemicals are removed from the water. [1]
Abundant growth of cyanobacteria in freshwater, estuarine, and coastal ecosystems due to increased anthropogenic eutrophication and global climate change has created serious concern toward harmful bloom formation and surface water contamination. [8] Cyanobacteria are considered the oldest groups of photosynthetic prokaryotes [9] and possibly ...
Cyanobacteria (blue-green algae) bloom on Lake Erie (United States) in 2009. These kinds of algae can cause harmful algal bloom. A harmful algal bloom (HAB), or excessive algae growth, is an algal bloom that causes negative impacts to other organisms by production of natural algae-produced toxins, water deoxygenation, mechanical damage to other organisms, or by other means.
Blooms cause problems ecologically, economically, and in freshwater systems, adversely affect the quality of drinking water. [45] Spikes in cyanobacteria populations are usually brought on by nutrient increases due to run-off from fertilizers, dust, and sewage. [46] By killing hosts, cyanophages may help restore ecosystems to their natural balance.
Microcystis aeruginosa is a species of freshwater cyanobacteria that can form harmful algal blooms of economic and ecological importance. They are the most common toxic cyanobacterial bloom in eutrophic fresh water. Cyanobacteria produce neurotoxins and peptide hepatotoxins, such as microcystin and cyanopeptolin. [1]
Here are the Cape Cod ponds under alert or watch for cyanobacteria: Orleans. Boland Pond in Orleans is under a public health advisory after a sample was taken on May 29. Observed scum was ...
This picture depicts the initial appearance of three different Winogradsky columns. They are soil and water samples from a river, the later two columns have been modified with phosphate, nitrate, sulfur and oxygen additives. These additions promote the growth of various bacteria specific to the anaerobic and aerobic regions of the column.
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