Here the authors show the effects of acidification on benthic ecosystems at shallow coastal sites where volcanic CO2 vents lower the pH of the water column. Along gradients of normal pH (8.1

Rising levels of atmospheric carbon dioxide lead to acidification of the oceans. A site in the Mediterranean, naturally carbonated by under-sea volcanoes, provides clues to the possible effects on marine ecosystems.

Scientists are developing a tsunami warning system for the Mediterranean region which they said on Wednesday should be ready in 2011 and could save thousands of lives. The 40-50 million euro ($63.32 million) project started three years ago, shortly after the December 2004 Indian Ocean tsunami that killed 230,000 people and which prompted Asian nations to develop warning systems. "It is true that in the Mediterranean tsunamis are rare," said project vice chairman Gerassimos Papadopoulos at a geoscience conference.

The municipality of Sidon, Lebanon, has announced a state of environmental emergency after a storm that battered the Lebanese coast caused a landslide at a huge seaside garbage dump and sent more

The only way to save the bluefin tuna, one of the most marvelous and endangered fish in the ocean, may be to domesticate the species. March 2008

Human activities are affecting every square mile of the world's oceans, according to a study by a team of American, British and Canadian researchers who mapped the severity of the effects from pole to pole. The analysis of 17 global data sets, led by Benjamin S. Halpern of the National Center for Ecological Analysis and Synthesis in Santa Barbara, Calif., illustrates the extent to which humans are reshaping the seas through overfishing, air pollution and commercial shipping. The study, published in the journal Science, examines the impacts on nearly two dozen marine ecosystems, including coral reefs and continental shelves. "For the first time we can see where some of the most threatened marine ecosystems are and what might be degrading them,' said Elizabeth Selig, a Ph.D. candidate at the University of North Carolina at Chapel Hill and a co-author, in a statement. "This information enables us to tailor strategies and set priorities for ecosystem management. And it shows that while local efforts are important, we also need to be thinking about global solutions.' The team of scientists analysed factors, including warming ocean temperatures due to greenhouse gas emissions, nutrient runoff and fishing. They found that the areas under the most stress included are "the North and Norwegian seas, South and East China seas, Eastern Caribbean, North American eastern seaboard, Mediterranean, Persian Gulf, Bering Sea, and the waters around Sri Lanka.' Some marine ecosystems are under acute pressure, the scientists concluded, including sea mounts, mangrove swamps, seagrass and coral reefs. Almost half of all coral reefs, they wrote, "experience medium high to very high impact' from humans. Overall, rising ocean temperatures represent the biggest threat to marine ecosystems.

European fisheries ministers have agreed on a 15-year plan to tighten rules protecting threatened tuna fish stocks in the eastern Atlantic Ocean and Mediterranean Sea. The plan obliges member

>> The Mexican police caught six smugglers with about 57,000 Olive Ridley turtle eggs on August 28 in Oaxaca state. The eggs of this endangered species are part of people's traditional diet and

Eye for the rare Slender loris, a nocturnal primate with huge eyes, is endemic to Sri Lanka and is one of the rarest and weirdest animals, which will be the focus of an ambitious conservation

The Mediterranean region, particularly the area around Greece, could be hit by a major tsunami before the end of the century, according to Gerassimos Papadopoulos, a scientist at the Athens Institute