caa a22 4500 606149228 CHVBK 20210128100533.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s00531-015-1148-4 doi (NATIONALLICENCE)springer-10.1007/s00531-015-1148-4 Present and future of subsurface biosphere studies in lacustrine sediments through scientific drilling [Elektronische Daten] [Daniel Ariztegui, Camille Thomas, Aurèle Vuillemin] Recently, the discovery of active microbial life in deep-sea sediments has triggered a rapid development of the field known as the "deep biosphere.” Geomicrobiological investigations in lacustrine basins have also shown a substantial microbial impact on lake sediments similar to that described for the marine record. Although only 30% of the lake sites drilled by the International Continental Drilling Program (ICDP) have included microbial investigations, these lakes cover a relatively wide range of salinities (from 0.15 to 33.8%), pH (from 6.0 to 9.8) and environmental conditions (from very arid to humid subtropical conditions). Here, we analyze results of very recent ICDP lake sites including subsurface biosphere research from southern Patagonia (Laguna Potrok Aike) to the Levantine area (Dead Sea) as well as the East Anatolian high plateau (Lake Van) and Macedonia (Lake Ohrid). These various settings allow the examination of the impact of contrasting environments on microbial activity and their subsequent role during early diagenesis. Furthermore, they permit the identification of biosignatures of former microbial activity recorded in the sediments as well as investigating the impact of microbes in biogeochemical cycles. One of the general outcomes of these preliminary investigations is data to support the hypothesis that microbes react to climatically driven environmental changes that have a direct impact on their subsurface distribution and diversity. This is clear at conspicuous levels associated with well-known climatic periods such as the Medieval Climatic Anomaly or the Little Ice Age. Although more research is needed, this relationship between prevailing microbial assemblages and different climatic settings appears to dominate the lacustrine sites studied until to date. The Author(s), 2015 Lakes nationallicence Microbes nationallicence Biosignatures nationallicence Genomics nationallicence Ariztegui Daniel Department of Earth Sciences, University of Geneva, rue des Maraichers 13, 1205, Geneva, Switzerland aut Thomas Camille Department of Earth Sciences, University of Geneva, rue des Maraichers 13, 1205, Geneva, Switzerland aut Vuillemin Aurèle Department of Earth Sciences, University of Geneva, rue des Maraichers 13, 1205, Geneva, Switzerland aut International Journal of Earth Sciences Springer Berlin Heidelberg 104/6(2015-09-01), 1655-1665 1437-3254 104:6<1655 2015 104 531 https://doi.org/10.1007/s00531-015-1148-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 review-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00531-015-1148-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ariztegui Daniel Department of Earth Sciences, University of Geneva, rue des Maraichers 13, 1205, Geneva, Switzerland aut NATIONALLICENCE 700 1- Thomas Camille Department of Earth Sciences, University of Geneva, rue des Maraichers 13, 1205, Geneva, Switzerland aut NATIONALLICENCE 700 1- Vuillemin Aurèle Department of Earth Sciences, University of Geneva, rue des Maraichers 13, 1205, Geneva, Switzerland aut NATIONALLICENCE 773 0- International Journal of Earth Sciences Springer Berlin Heidelberg 104/6(2015-09-01), 1655-1665 1437-3254 104:6<1655 2015 104 531