<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/94661568-3c5f-42aa-9628-06ae3b3c5152/D70DDB09-51B7-4577-8223-E6195F4DBB58/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.sciencenews.org/index/generic/activity/view/id/42853/title/Antarctic_ecosystem_holds__unusual_microbes" href="http://www.sciencenews.org/index/generic/activity/view/id/42853/title/Antarctic_ecosystem_holds__unusual_microbes" style="font-size: 11px;">www.sciencenews.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciencenews.org/index/generic/activity/view/id/42853/title/Antarctic_ecosystem_holds__unusual_microbes"><DIV class="topic content_description print"> Antarctic ecosystem holds unusual microbes </DIV></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciencenews.org/index/generic/activity/view/id/42853/title/Antarctic_ecosystem_holds__unusual_microbes"><P>A frigid, sulfate-rich pool of anoxic, hypersaline water that hasn’t seen the sun since it was capped by a 400-meter-thick Antarctic glacier at least 1.5 million years ago is host to microbes that derive energy by breathing iron scraped from bedrock.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciencenews.org/index/generic/activity/view/id/42853/title/Antarctic_ecosystem_holds__unusual_microbes"><P>The briny samples include no dissolved oxygen and little organic matter, but plenty of dissolved iron — an element that quickly oxidizes to form blood-red rust when the seepage hits the air. The microbes in the seepage are similar to some species found in modern-day marine environments, the researchers note. And the microbes gain their energy by metabolically transferring electrons from the water’s dissolved sulfates to its iron, which is liberated from the bedrock by the scraping of the glacier, says Mikucki.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciencenews.org/index/generic/activity/view/id/42853/title/Antarctic_ecosystem_holds__unusual_microbes"><P>“This is a great example of electron shuttling sustaining an ecosystem,” says Dianne K. Newman, a geobiologist at MIT.</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/D70DDB09-51B7-4577-8223-E6195F4DBB58/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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