Thu, 21 Aug 2008 09:41:11 BST CiteULike: renatomilanis climate http://www.citeulike.org/user/renatomilani/tag/climate CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/renatomilani/article/2776568 <i>Science, Vol. 320, No. 5877. (9 May 2008), pp. 752-753.</i><br /><br />10.1126/science.1158105 ECOLOGY: How the Sahara Became Dry Jonathan Holmes doi:10.1126/science.1158105 Science, Vol. 320, No. 5877. (9 May 2008), pp. 752-753. 2008-05-09T20:24:02-00:00 2008 Science 320 5877 752 753 climate http://www.citeulike.org/user/renatomilani/article/2218997 <i>Science, Vol. 319, No. 5860. (11 January 2008), pp. 169-172.</i><br /><br />The forest biome of Amazonia is one of Earth's greatest biological treasures and a major component of the Earth system. This century, it faces the dual threats of deforestation and stress from climate change. Here, we summarize some of the latest findings and thinking on these threats, explore the consequences for the forest ecosystem and its human residents, and outline options for the future of Amazonia. We also discuss the implications of new proposals to finance preservation of Amazonian forests. 10.1126/science.1146961 Climate Change, Deforestation, and the Fate of the Amazon Yadvinder Malhi Timmons Roberts Richard Betts Timothy Killeen Wenhong Li Carlos Nobre doi:10.1126/science.1146961 Science, Vol. 319, No. 5860. (11 January 2008), pp. 169-172. 2008-01-11T13:42:53-00:00 2008 Science 319 5860 169 172 change climate http://www.citeulike.org/user/renatomilani/article/2113480 <i>Science, Vol. 318, No. 5857. (14 December 2007), pp. 1737-1742.</i><br /><br />Atmospheric carbon dioxide concentration is expected to exceed 500 parts per million and global temperatures to rise by at least 2degreesC by 2050 to 2100, values that significantly exceed those of at least the past 420,000 years during which most extant marine organisms evolved. Under conditions expected in the 21st century, global warming and ocean acidification will compromise carbonate accretion, with corals becoming increasingly rare on reef systems. The result will be less diverse reef communities and carbonate reef structures that fail to be maintained. Climate change also exacerbates local stresses from declining water quality and overexploitation of key species, driving reefs increasingly toward the tipping point for functional collapse. This review presents future scenarios for coral reefs that predict increasingly serious consequences for reef-associated fisheries, tourism, coastal protection, and people. As the International Year of the Reef 2008 begins, scaled-up management intervention and decisive action on global emissions are required if the loss of coral-dominated ecosystems is to be avoided. 10.1126/science.1152509 Coral Reefs Under Rapid Climate Change and Ocean Acidification O Hoegh-Guldberg PJ Mumby AJ Hooten RS Steneck P Greenfield E Gomez CD Harvell PF Sale AJ Edwards K Caldeira N Knowlton CM Eakin R Iglesias-Prieto N Muthiga RH Bradbury A Dubi ME Hatziolos doi:10.1126/science.1152509 Science, Vol. 318, No. 5857. (14 December 2007), pp. 1737-1742. 2007-12-14T12:53:14-00:00 2007 Science 318 5857 1737 1742 change climate