<?xml version="1.0" encoding="UTF-8" ?><MD_Metadata xmlns="http://www.isotc211.org/2005/gmd" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:gml="http://www.opengis.net/gml" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.isotc211.org/2005/gmd http://www.isotc211.org/2005/gmd/gmd.xsd"><fileIdentifier><gco:CharacterString>georefid:2013-048184</gco:CharacterString></fileIdentifier><contact><CI_ResponsibleParty><organisationName><gco:CharacterString>SEDIS Publication Catalogue</gco:CharacterString></organisationName><contactInfo><CI_Contact><address><CI_Address><electronicMailAddress><gco:CharacterString>ana.macario@awi.de</gco:CharacterString></electronicMailAddress></CI_Address></address><onlineResource><CI_OnlineResource><linkage><URL>http://sedis.iodp.org/pub-catalogue/</URL></linkage><function><CI_OnLineFunctionCode 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biosphere</gco:CharacterString></title><date><CI_Date><date><gco:Date>2012-01-01</gco:Date></date><dateType><CI_DateTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode_publication">publication</CI_DateTypeCode></dateType></CI_Date></date><identifier><MD_Identifier><code><gco:CharacterString>georefid:2013-048184</gco:CharacterString></code></MD_Identifier></identifier><identifier><MD_Identifier><code><gco:CharacterString>doi:10.3389/fmicb.2011.00285</gco:CharacterString></code></MD_Identifier></identifier><citedResponsibleParty><CI_ResponsibleParty><individualName><gco:CharacterString>Biddle, Jennifer F.</gco:CharacterString></individualName><organisationName><gco:CharacterString>University of Delaware, College of Earth, Ocean and the Environment, Lewes, DE, United States</gco:CharacterString></organisationName><role><CI_RoleCode 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University, United States</gco:CharacterString></organisationName><role><CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode_author">author</CI_RoleCode></role></CI_ResponsibleParty></citedResponsibleParty><citedResponsibleParty><CI_ResponsibleParty><individualName><gco:CharacterString>Tully, Benjamin J.</gco:CharacterString></individualName><organisationName><gco:CharacterString>Western Washington University, United States</gco:CharacterString></organisationName><role><CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode_author">author</CI_RoleCode></role></CI_ResponsibleParty></citedResponsibleParty><citedResponsibleParty><CI_ResponsibleParty><individualName><gco:CharacterString>Edwards, Katrina 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The advent of molecular biology has advanced and accelerated the study of evolution by allowing direct examination of the genetic material that ultimately determines the phenotypes upon which selection acts. The study of evolution has been furthered through examination of microbial evolution, with large population numbers, short generation times, and easily extractable DNA. Such work has spawned the study of microbial biogeography, with the realization that concepts developed in population genetics may be applicable to microbial genomes (Martiny et al., 2006; Manhes and Velicer, 2011). Microbial biogeography and adaptation has been examined in many different environments. Here we argue that the deep biosphere is a unique environment for the study of evolution and list specific factors that can be considered and where the studies may be performed. 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