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Sea cucumbers may save Great Barrier Reef http://apocadocs.com/s.pl?1327893578
Tropical sea cucumbers and their faeces could save coral reefs from the harmful impacts of climate change, scientists have found.
Scientists at One Tree Island, the University of Sydney's research station on the Great Barrier Reef, say sea cucumbers reduce the impact of ocean acidification on coral growth.
"When they ingest sand, the natural digestive processes in the sea cucumber's gut increases the pH levels of the water on the reef where they defecate," Tree Island director professor Maria Byrne said....
"The research at One Tree Island showed that, in a healthy reef, dissolution of calcium carbonate sediment by sea cucumbers and other bioeroders appears to be an important component of the natural calcium carbonate turnover."
The ammonia waste produced when sea cucumbers digest sand also serves to fertilise the surrounding area, providing nutrients for coral growth.
Sea cucumbers are among the largest invertebrates found on tropical reefs.
About 30 species are commercially harvested by the fishery industry along the Great Barrier Reef and throughout the tropics.
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