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| Name: | devonrobinson  |
| E-Mail: | devonrobinson sina.com |
| Homepage: | http://salemonclerdown.com |
| Time: | 12/25/2012 at 12:45pm (UTC) |
| Message: | New Australian research shows coral reefs are more resistant to ocean acidification than first thought. Scientists have been concerned that coral is vulnerable when carbon levels in the atmosphere rise, along with the acidity of the ocean. But an Australian National University study on the Great Barrier Reef suggests otherwise.Amid the threat to reefs from the effects of climate change, pollution and overfishing, Australian researchers have found some rare good news.A team at the Australia National University in Canberra has been investigating coralline algae, which are plants that act like a glue to bind coral. One useful analogy is that the algae are the cement, while the coral are the bricks that comprise a reef system. A new study has found that dolomite, a carbonate mineral, helps to protect reefs from rising ocean acidity, which is caused by the absorption of carbon dioxide from the atmosphere.Lead author Merinda Nash, a doctoral student, says it is an important discovery. There was a lot of concern that the coralline algae, which plays a key role in building the reef and binding corals together, that this would be the first thing to dissolve as CO2 went up and that that would impact the reef structure, she said. So we found that this presence of dolomite actually reduced the dissolution rate significantly to about one tenth the rate of the algae without the dolomite, so that s quite good news. Many scientists believe that carbon emissions from the burning of fossil fuels are making the oceans more acidic.Coral reefs are home to hundreds of fish, sea stars, crabs and marine worms, as well as a wondrous array of other animals and shellfish.Reefs across the Asia-Pacific are widely considered to be at risk from a variety of threats. Conservationists say Australia s iconic Great Barrier Reef is at risk from industrial development, including dredging to build giant coal ports in the state of Queensland and from the run-off of pesticides from farms. By 2020 it is estimated that 7,000 ships will travel across the reef every year, as the export of Australia s natural resources intensifies.The reef is the largest in the world and snakes for about 2,500 kilometers down Australia s northeastern coast. It is the only living thing visible from space. |
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| Time: | 12/17/2012 at 7:50am (UTC) |
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| Time: | 12/16/2012 at 10:49pm (UTC) |
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| Time: | 12/15/2012 at 11:14am (UTC) |
| Message: | Gaza: Clinton works for truce 'in the days ahead' Israeli air strikes shook the Gaza Strip and Palestinian rockets struck across the border as U.S. Secretary of State Hillary Clinton held talks in Jerusalem in the early hours of Wednesday, seeking a truce that can hold back Israel's ground troops. Hamas, the Islamist movement controlling Gaza, and Egypt, whose new, Islamist government is trying to broker a truce, had floated hopes for a ceasefire by late Tuesday; but by the time Clinton met Israeli Prime Minister Benjamin Netanyahu it was clear there would be more argument, and more violence, first. Hamas leaders in Cairo accused the Jewish state of failing to respond to proposals and said an announcement on holding fire would not come before daylight on Wednesday. Israel Radio quoted an Israeli official saying a truce was held up due to "a last-minute delay in the understandings between Hamas and Israel". Who is Hamas? 5 questions about the Palestinian militant group. An initial halt to attacks may, however, not see the sides stand their forces down from battle stations immediately; Clinton, who flies to Cairo to see Egyptian President Mohamed Mursi later on Wednesday, spoke of a deal "in the days ahead". As she arrived in Israel after nightfall, Israel was stepping up its bombardment. Artillery shells and missiles fired from naval gunboats offshore slammed into the territory and air strikes came at a frequency of about one every 10 minutes. |
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| Time: | 12/10/2012 at 11:41pm (UTC) |
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| Time: | 11/12/2012 at 4:09pm (UTC) |
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