What requirements do the dinoflagellates Zooxanthellae have?

What requirements do the dinoflagellates Zooxanthellae have?

During the day, they provide their host with the organic carbon products of photosynthesis, sometimes providing up to 90% of their host’s energy needs for metabolism, growth and reproduction. In return, they receive nutrients, carbon dioxide, and an elevated position with access to sunshine.

Where are Scleractinians found?

Ahermatypic corals are either colonial or solitary and are found in all regions of the ocean and do not build reefs. Some live in tropical waters but some inhabit temperate seas, polar waters, or live at great depths, from the photic zone down to about 6,000 m (20,000 ft).

Do Hermatypic corals have zooxanthellae?

Corals that build reefs are called hermatypic corals, while those that do not build reefs are called ahermatypic corals. Most hermatypic corals have zooxanthellae algae living symbiotically inside of the coral polyps.

What does zooxanthellae need to survive?

Tiny plant cells called zooxanthellae live within most types of coral polyps. They help the coral survive by providing it with food resulting from photosynthesis. In turn, the coral polyps provide the cells with a protected environment and the nutrients they need to carry out photosynthesis.

What type of symbiotic relationship do corals and zooxanthellae have?

The symbiosis between corals and zooxanthellae is supposed to be mutualistic, meaning that they both receive positive benefits from their partnership. Zooxanthellae are provided with a safe place to live within the coral tissue, and they also get to use the coral’s waste products as nutrients to power photosynthesis.

What is coral stone?

The Red Coral Stone, widely known as Moonga or Praval Ratna is a dark red organic stone harvested deep under the seabed by oceanic creatures called coral polyps.

When did Scleractinia appear?

about 240 Ma
The Scleractinia suddenly appear in the fossil record about 240 Ma, but the range of morphological variation seen in these Middle Triassic fossils is comparable to that of modern scleractinians, implying much earlier origins that have so far remained elusive.

How do hermatypic corals feed?

What do corals eat? Coral polyps with extended tentacles feeding on zooplankton. During feeding, a coral polyp will extend its tentacles out from its body and wave them in the water current where they encounter zooplankton, bacterioplankton, or other food particles.

How do you think hermatypic corals obtain nutrients?

Many reef-forming corals contain symbiotic photosynthetic zooxanthellae, which contribute to their nutritional needs.

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