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    STUDIA BIOLOGIA - Issue no. 1 / 2019  
         
  Article:   MINERAL PRESERVATION AND PHOTOPROTECTIVE ATTRIBUTES OF HALOPHILIC BACTERIA AND ARCHAEA IN MODERN AND PERMIAN LAKEBED ENVIRONMENTS.

Authors:  SCOTT M. PERL, BONNIE K. BAXTER, AARON J. CELESTIAN.
 
       
         
  Abstract:  Biogenic and inorganic matter can be preserved within inclusions during evaporite mineralization from intermittent hypersaline lakebed systems. The amount of included material within the crystalline precipitates depends on source volumes and time-scales of lakebed formation events (Baxter et al., 2007; Cockell et al., 2018) where photoprotective responses from halophilic organisms are present. We have compared these features against different climate and seasonal settings where solar flux is near constant versus seasonal or removed (buried) completly. These photoprotective features (e.g. carotenoids), can be quantified alongside minerals that assist in the preservation process of both organic byproducts (lipids) and microbial communities (Perl et al., 2019) that have different preservation potentials due to mineral components. The purpose of this presentation is to review the modern hypersaline sites and compare preservation metrics of biogenic features in varied environments and to give insight to upcoming Martian in-situ and future Mars Sample Return analyses.

b<>Keywords: clays, evaporites, halophiles, Mars, photoprotection, salt.
 
         
     
         
         
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