Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.pss.2008.10.002 |
Astrobiological significance of the sabkha life and environments of southern Tunisia | |
Stivaletta, Nunzia1; Barbieri, Roberto1; Picard, Christine2; Bosco, Marco2 | |
通讯作者 | Stivaletta, Nunzia |
会议名称 | Symposium on Exploring Mars and its Earth Analogues |
会议日期 | JUN 19-23, 2007 |
会议地点 | Trento, ITALY |
英文摘要 | In high-salinity and water-scarce environments, such as in hot and dry deserts, species develop adaptive strategies that are necessary for living in such harsh conditions. Continental ephemeral salt lakes (sabkhas) with periodic flooding from subsurface groundwater followed by high salt concentrations, such as the ones of the northern Africa Chotts, rank among the geological settings wherein the combined effect of salt concentration and fluctuation of water availability make the environment unstable and can thereafter lead to extreme changes. The present study investigates the continental sabkha environments of southern Tunisia, in which ecological niches (i.e. water and salt precipitates, including halite, gypsum, and dolomite) host microbial life. Halophilic microorganisms can be trapped in the extensive saline crusts of halite and gypsum, which can be regarded as the first step of their delivery to the fossil record. The study of halophiles can provide clues for the understanding of life strategies in extreme terrestrial environments, such as sabkhas, which are potential good terrestrial analogs for evaporite-bearing Martian deposits. (C) 2008 Elsevier Ltd. All rights reserved. |
英文关键词 | Sabkha Evaporite Martian environment Astrobiology |
来源出版物 | PLANETARY AND SPACE SCIENCE |
ISSN | 0032-0633 |
出版年 | 2009 |
卷号 | 57 |
期号 | 5-6 |
页码 | 597-605 |
出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
类型 | Article;Proceedings Paper |
语种 | 英语 |
国家 | Italy |
收录类别 | SCI-E ; CPCI-S |
WOS记录号 | WOS:000266863400008 |
WOS关键词 | HALOTOLERANT BACTERIUM ; OMEGA/MARS EXPRESS ; SNC METEORITES ; SALT CRYSTAL ; GYPSUM CRUST ; MARS ; DESERT ; REGION ; ECOSYSTEMS ; COMMUNITY |
WOS类目 | Astronomy & Astrophysics |
WOS研究方向 | Astronomy & Astrophysics |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/297869 |
作者单位 | 1.Univ Bologna, Dipartimento Sci Terra & Geol Ambientali, I-40126 Bologna, Italy; 2.Univ Bologna, Dipartimento Sci & Tecnol Agroambientali, I-40127 Bologna, Italy |
推荐引用方式 GB/T 7714 | Stivaletta, Nunzia,Barbieri, Roberto,Picard, Christine,et al. Astrobiological significance of the sabkha life and environments of southern Tunisia[C]:PERGAMON-ELSEVIER SCIENCE LTD,2009:597-605. |
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