benthic communities
DESCRIPTION
Benthic Communities. living along the bottom of the ocean. Benthic Communities. Coral Reefs. Coral Reefs. Corals Are animals (Cnidarians) Small (ant-sized) polyps live in large colonies Hermatypic corals secret a calcium carbonate skeleton…the reef. Coral Reefs. Zooxanthellae - PowerPoint PPT PresentationTRANSCRIPT
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Benthic Communities
living along the
bottom of the ocean
![Page 2: Benthic Communities](https://reader035.vdocument.in/reader035/viewer/2022062304/56812c2e550346895d90b287/html5/thumbnails/2.jpg)
Benthic Communities
• Coral Reefs
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Coral Reefs
• Corals– Are animals (Cnidarians)– Small (ant-sized) polyps live in large colonies– Hermatypic corals secret a calcium carbonate
skeleton…the reef
![Page 4: Benthic Communities](https://reader035.vdocument.in/reader035/viewer/2022062304/56812c2e550346895d90b287/html5/thumbnails/4.jpg)
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Coral Reefs
• Zooxanthellae– Dinoflagellate that lives within the coral polyp– A mutualism– Algae provide food, speeds up calcium
carbonate deposition & get nutrients in return
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Coral Reefs
• Hermatypic Coral’s ideal habitat is 5-10 m (16-33 ft) depth & temperatures warmer than 18-21oC (64-70oF)
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Fig. 14-12, p. 294
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Coral Reefs
• Reefs support a large diversity of other organisms– Home to 25% of the world’s marine species