Other factors contributing to coral reef bleaching are Local pollution disease

Other factors contributing to coral reef bleaching

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Other factors contributing to coral reef bleaching are: Local pollution, disease, sedimentation, changes in salinity, and ocean acidification. All these factors can weaken the coral and make the reef more vulnerable when a threshold temperature of 86 0 F (30 0 C) is reached for more than a short period of time.
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Coral Reef Bleaching Has become a worldwide phenomena. (Coral reef damage exists in almost 100 countries around the world.) Corals are expelling algae on a worldwide basis in areas where the threshold temperature of 86 0 F (30 0 C) is reached for more than a short period of time . As average ocean temperatures climb higher, coral reef bleaching is not a temporary phenomena, but is continuing worldwide . It is an indicator of environmental trauma. Sea surface temperatures have risen 1.8 0 F – 3.6 0 F as a result of climate change. 90% of the excess heat from climate change is going into the oceans .
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Impacts of Coral Reef Bleaching 1) Major source of protein in tropical areas. Reef based fisheries are based there, and the destruction of the reefs from bleaching wipes out marine life. 2) They act as a breakwater to stop hurricanes. So when they die out, it increases the danger from hurricanes. 3) Much of tourism in these areas is based upon snorkeling and scuba diving. Death of the coral reefs cripples the tourist industry. Australia, for example, earns $52 billion a year from its marine resources. (This is more than the value of all its agricultural production put together.)
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Impact of Warming on All Oceans As ocean waters warm they can hold less dissolved oxygen. Marine species need this dissolved oxygen to survive. Less available oxygen reduces populations of fish and other marine species . Some areas of the ocean are now devoid of oxygen. Warmer waters also tend to have less nutrients in them than cold water. This also reduces marine populations.
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Present Impacts of Climate Change on Living Species 1) In Canada 4 million acres of spruce trees have been killed by the spruce bark beetle, a pest that thrives in the warmer temperatures that have occurred because of climate change. White spruce is the most valuable timber species of the North American boreal forest. Summer temperatures have frequently exceeded the tree’s critical threshold temperature. 2) Migration of maple trees northward. 3) Increases in asthma among children on the Caribbean islands resulting from dust blown in from parts of Africa that are experiencing severe drought . 4) Woodland caribou in the Ontario Province of Canada are headed for extinction. One half of their habitat has been lost in the last 120 years. Every 10 years the boundary of their habitat moves 21 miles (34 kilometers) north.
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5) More than 279 species of plants and animals have been documented as having already responded to climate change by moving closer to the poles. 6) Malaria has now spread to higher altitudes in the Columbian Andes at an altitude of 7,000 feet.
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