Water

Earth's water cycle involves the atmosphere, land, and bodies of water.

John M. Evans, USGS

  • Drought in Eastern Africa Featured Article Drought in Eastern Africa Drought in Eastern Africa

    More Frequent Drought Likely in Eastern Africa The increased frequency of drought observed in eastern Africa over the last 20 years is likely to continue as long as... More »

  • Evidence: Benefits of Biodiversity Featured Article Evidence: Benefits of Biodiversity Evidence: Benefits of Biodiversity

    Precedent-Setting Evidence of the Benefits of Biodiversity New evidence that biodiversity promotes water quality suggests that accelerating species losses may... More »

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Evidence: Benefits of Biodiversity Last Updated on 2011-04-06 00:00:00 Precedent-Setting Evidence of the Benefits of Biodiversity New evidence that biodiversity promotes water quality suggests that accelerating species losses may compromise water quality View a webcast with Bradley Cardinale of the University of Michigan. Frequent reports of accelerating species losses invariably raise questions about why such losses matter and why we should work to conserve biodiversity. Biologists have traditionally responded to such questions by citing societal benefits that are often presumed to be offered by biodiversity--benefits like controlling pests and diseases, promoting the productivity of fisheries, and helping to purify air and water, among many others. Nevertheless, many of these presumed benefits are have yet to be supported by rigorous scientific data. But Bradley J. Cardinale of the University of Michigan... More »
Drought in Eastern Africa Last Updated on 2011-01-29 00:00:00 More Frequent Drought Likely in Eastern Africa The increased frequency of drought observed in eastern Africa over the last 20 years is likely to continue as long as global temperatures continue to rise, according to research published in Climate Dynamics. This poses increased risk to the estimated 17.5 million people in the Greater Horn of Africa who currently face potential food shortages. Scientists from the U.S. Geological Survey and the University of California, Santa Barbara, determined that warming of the Indian Ocean, which causes decreased rainfall in eastern Africa, is linked to global warming. These new projections of continued drought contradict previous scenarios by the Intergovernmental Panel on Climate Change predicting increased rainfall in eastern Africa. This new research supports efforts by the USGS and the U.S. Agency for International Development... More »
Microbial Electrosynthesis: Carbon Dioxide and Water to Extracellular Organics Last Updated on 2010-12-11 00:00:00 This article appeared first in mBio, an open-access journal of the American Society for Microbiology operating under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License. The article is a verbatim version of the original and is not available for edits or additions by Encyclopedia of Earth editors or authors. Companion articles on the same topic that are editable may exist within the Encyclopedia of Earth.   Microbial Electrosynthesis: Feeding Microbes Electricity To Convert Carbon Dioxide and Water to Multicarbon Extracellular Organic Compounds Abstract The possibility of providing the acetogenic microorganism Sporomusa ovata with electrons delivered directly to the cells with a graphite electrode for the reduction of carbon dioxide to organic compounds was investigated. Biofilms of S. ovata growing on... More »