{"id":7778,"date":"2016-06-14T23:06:23","date_gmt":"2016-06-14T23:06:23","guid":{"rendered":"https:\/\/www.darkenergybiosphere.org\/?post_type=publication&#038;p=7767"},"modified":"2016-10-14T19:06:50","modified_gmt":"2016-10-14T19:06:50","slug":"thermal-and-geochemical-influences-on-microbial-biogeography-in-the-hydrothermal-sediments-of-guaymas-basin-gulf-of-california","status":"publish","type":"publication","link":"https:\/\/www.darkenergybiosphere.org\/publication\/thermal-and-geochemical-influences-on-microbial-biogeography-in-the-hydrothermal-sediments-of-guaymas-basin-gulf-of-california\/","title":{"rendered":"Thermal and geochemical influences on microbial biogeography in the hydrothermal sediments of Guaymas Basin, Gulf of California"},"content":{"rendered":"<p>Extreme thermal gradients and compressed metabolic zones limit the depth range of microbial colonization in hydrothermally active sediments at Guaymas Basin. We investigated the physicochemical characteristics of this ecosystem and their influence on microbial community structure. Temperature\u2010related trends of \u03b4<sup>13<\/sup>C values of methane and dissolved inorganic carbon from 36 sediment cores suggest <em>in situ<\/em> thermal limits for microbial anaerobic methane oxidation and organic carbon re\u2010mineralization near 80\u00b0C and 100\u00b0C respectively. Temperature logging probes deposited in hydrothermal sediments for 8 days demonstrate substantial thermal fluctuations of up to 25\u00b0C. Putative anaerobic methanotroph (ANME) populations dominate the archaeal community, transitioning from ANME\u20101 archaea in warm surficial sediments towards ANME\u20101 Guaymas archaea as temperatures increase downcore. Since ANME archaea performing anaerobic oxidation of methane double on longer time scales (months) compared with relatively rapid <em>in situ<\/em> temperature fluctuations (hours to days), we conclude that ANME archaea possess a high tolerance for short\u2010term shifts in the thermal regime.<\/p>\n","protected":false},"template":"","tags":[],"publication_type":[19],"_links":{"self":[{"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/publication\/7778"}],"collection":[{"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/publication"}],"about":[{"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/types\/publication"}],"wp:attachment":[{"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/media?parent=7778"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/tags?post=7778"},{"taxonomy":"publication_type","embeddable":true,"href":"https:\/\/www.darkenergybiosphere.org\/wp-json\/wp\/v2\/publication_type?post=7778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}