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ecomedia.bg floods in Australia are dangerous for corals How will the floods in Australia's Great Barrier Reef? Flood damage corals in different whelk shells ways. On the one hand they can not survive in fresh water, because whelk shells their physiology is adapted to salt water. On the other - the mud darkens the water and block sunlight. This hampers photosynthesis of algae that live in symbiosis with them. Furthermore, all the nutrients such as nitrogen and phosphorous in larger quantities can cause algal blooms, which makes the oxygen deficient water. Pesticides brought back into the ocean with fresh water, are also harmful to corals and kill them. So because of more frequent floods in Australia, tons of fresh water, sediment, soil, pesticides and other chemicals are poured into the ocean. Worse is that fresh water is warmer than the ocean, which further deteriorates the situation of coral and threatening the Great Barrier Reef. Australian scientists have other concerns than those related to coral. Some of them are, that will create conditions for the spread of spiny starfish, which are harmful to the reef and some places will be affected sea grass. And so manatees (dyugongite) will have nothing whelk shells to eat. For the past few weeks in the ocean constantly flow huge amounts whelk shells of fresh water, especially off the coast of Queensland. The process is so huge that it can be seen even on satellite pictures NASA. Scientists described as the most risky Keppel Island whelk shells near Rockhampton, whelk shells Morton Bay and Fraser Island - north of Brisbane. Dr. Alice Jones of Central University of Queensland whelk shells first raises the question of the impact of floods on corals in Keppel Bay. She explains that if you take a camera and start shooting, you can see everything like a big brown soup. Dr. Jones checked 5 island whelk shells and discovers stressed corals around them all. Elena Georgieva
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