PHOTOSYNTHESIS HAS TWO MAIN REACTIONS
The following characteristics are common to all Rhodophyta (red algae)
There is no evidence that chlorophylld is involved in photosynthesis.
The answers to these questions can have an important bearing on husbandry practices in ways that reef aquarists might not have considered. In particular, topics covered in this article include whether the pH or alkalinity of an aquarium or a refugium might impact the rate of photosynthesis, and whether aquarists should consider the availability of carbon dioxide to photosynthesizing organisms.
quarists can do several things to ensure the ready availability of carbon dioxide to photosynthetic marine organisms. While adequate studies have not been done with the exact species and exact conditions present in a reef aquarium to make definitive statements, it may be prudent to follow the following principles in order to maximize photosynthesis:
Firstly, there are very few single celledred algae.
In most cases, however, this process can account for only a portion of the demand for carbon dioxide. The rate at which carbon dioxide is used by rapidly photosynthesizing organisms is fast enough that organisms can deplete the carbon dioxide in the surrounding seawater faster than it can be replaced by diffusion and other transport mechanisms through the seawater. The depletion is readily observed by the pH in the near surface regions of these organisms, where the pH rises due to carbon dioxide loss. For this reason many marine organisms have developed other means of obtaining carbon dioxide, including processes involving bicarbonate.
arbon dioxide is able to cross cell membranes because it is a small uncharged molecule with reasonable solubility in organic materials. Consequently, organisms that take up carbon dioxide can do so passively (without spending any energy) and with no special mechanisms (such as proteins designed to speed up that process). Many marine algae and other organisms take up some measurable portion of the carbon dioxide that they incorporate during photosynthesis by this process.
Fossils of red algae have been found in rocks 500 million years old.
All algae contain a pigment called chlorophyll a (other types of chlorophyll such as b, c and / or d may also be present) and they make their own food by photosynthesis. The chlorophyll is contained in the chloroplasts and gives many algae their green appearance. However some algae appear brown, yellow or red because in addition to chlorophylls they have other accessory pigments that camouflage the green colour.
Green algae can make their own food through a process of photosynthesis. They are at the beginning of the food chain and are known as primary producers.
simazine), copper will kill redalgae.
NOVA - Official Website | Illuminating Photosynthesis
Third, Simon Ellis presents "Its a Jungle in There" and mentions hisunsuccessful battle with red algae.
01/01/2011 · Illuminating Photosynthesis
Nevertheless, deposited red algae willbenefit from the extra nutrients which can also originate from soils.
Photosynthesis/Algae Flashcards | Quizlet
If nutrients concentrations arereduced in the water column, the algae will suffer.
How Does Seaweed Conduct Photosynthesis? | Sciencing
This classification also suggests groupings of phyla into superphyla and form-superphyla, and a broadened kingdomProtista (including green algae, oomycotes and slime molds but excluding red and brown algae).Phylum and division representthe same level of organization; the former is the zoological term, the latter is the botanical term.
the structure in plant cells that is the site of photosynthesis, ..
In nature, these epiphytic freshwater red algae arefound in fast moving streams which provide a constant, but perhaps lowconcentration supply of nutrients including CO2.
Oxygenic Photosynthesis in Algae and Cyanobacteria ..
They differ from otherphotosynthetic organisms in that they also have accessory pigments such as carotenoids, xanthophylls, phycobillins, and otherforms of chlorophyll.
Red Algae (Rhodophyta) - Facts, Uses, and Health Benefits
Freshwater algae, on the other hand, can sometimes obtain all of their required carbon dioxide by passive uptake. While a review of such literature is unnecessary in this article, I'll give one example. The freshwater chrysophyte alga, , has been shown to have none of the more sophisticated mechanisms for carbon dioxide uptake that are described later in this article, and it relies on simple passive uptake. For this reason it has been shown to photosynthesize most effectively where carbon dioxide concentrations are high, at pH 5-7.
Red Algae In Marine Aquarium - Petcha
The long thread variety is called beard algae (once misprinted as bearalgae), the shorter thread type is called brush algae; and a third type isdescribed as having very short threads and forms dark roundish spots.
Phycobilins - Role of Pigments in Photosynthesis
s mentioned above, few marine organisms have been shown to rely solely on passive carbon dioxide uptake, but the carbon dioxide concentrating mechanisms are often unknown. As stated in a review article in 2005, marine diatoms fix more than 10 billion tons of carbon by photosynthesis each year, but "there are still a number of fundamental unresolved aspects of inorganic carbon assimilation by marine diatoms. It is not clear how the carbon-concentrating mechanism functions."
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