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Photosynthesis of corals - Unisense

The brownish-green specks are the zooxanthellae that most shallow, warm-water corals depend on for much of their food.

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Monitor corals photosynthesis in situ

The P-I curves of photosynthesis are different for different corals living in shallow, well-illuminated areas when compared to corals living in shaded or deeper areas.

This increase is primarily due to an increase in the number of zooxanthellae (Sorokin 1993).

In some corals the density of zooxanthellae may also increase with decreasing light, resulting in the often observed “browning up” of corals in light-deficient tanks.

Coral 'Twilight Zone' Reveals New Type of Photosynthesis

Light, photosynthesis and the incredible ability of the corals to photoadapt play an important role in the keeping of corals in our reef aquariums.

The absorption spectrum for zooxanthellae has been shown to have a broad peak in the 400 to 500 nm waveband (blue-green) and a narrow peak in the 650 to 700 (red) waveband.

The zooxanthellae contain various types of pigments: chlorophyll a, chlorophyll c and the carotenoids, such as Beta carotene, peridinnine and dinoxanthines.

How do coral polyps go through photosynthesis? - Quora

Reef-building corals depend  on photosynthesis: they use the unlimited resources of solar energy and air to produce food.

When such a coral is placed in the aquarium under intense light conditions, it is quite likely that the coral may become highly oxygenated during peak photosynthesis and undergoes stress due to oxygen poisoning.

UV radiation is harmful to most zooxanthellae, and the corals harbor pigments that screen out UV to protect the zooxanthellae from radiation damage.

pistillata was not due to the density of zooxanthellae, but due to the average pigment content of the zooxanthellae.
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  • 06/07/2017 · Zooxanthellae have a pretty sweet deal

    Because their algal cells need light for photosynthesis, reef corals require clear water.

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    31/01/2014 · Scientists shine a light on coral photosynthesis January 31, 2014 by Marea Martlew, ..

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    While blue light in the mid-400nm range can activate photosynthesis, corals

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Photosynthetic Gorgonians for the Home Aquaria …

The basic adaptation mechanisms employed are various combinations of change in the chlorophyll content per unit surface area, change in the number and size of zooxanthellae, changes in coral morphology to increase the surface area available for light capture, and changes in respiration rate.

When Corals Met Algae: Symbiotic Relationship Crucial …

More recent research is indicating that the corals may, in fact, harbor different types of zooxanthellae and the corals may be able to change the mix of the zooxanthellae as a photo adaptation response.

Coral 'Twilight Zone' Reveals New Type of ..

The zooxanthellae in wild corals are adapted to a certain irradiance and spectral distribution, and when placed in a aquarium will have to adapt to its new lighting environment.

15/01/2015 · Photosynthesis Basics ..

What is interesting is that photosynthesis may actually be inhibited at high irradiance levels, although photoinhibition has not been reported for corals in the natural environment.

mostly use red light in the 650 to 700 nm range.

The rate at which photosynthesis occurs is dependent on the quality and quantity of light, density of zooxanthellae, composition of pigments, temperature and CO availability.

Corals of the World - Environments

Dustan’s research (1982) states that isolated zooxanthellal cells from corals growing at shallow depths absorb less energy than those from deep waters.

Scleractinian corals in many forms – Photo Synthesis

Photosynthetic pigments in the zooxanthellal cells carry out the collection of the light energy, such that they efficiently absorb light in the 400 to 700 nm range.

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