Abstract：
:Meaningful motion is an unambiguous biosignature, but because life in the Solar System is most likely to be microbial, the question is whether such motion may be detected effectively on the micrometer scale. Recent results on microbial motility in various Earth environments have provided insight into the physics and biology that determine whether and how microorganisms as small as bacteria and archaea swim, under which conditions, and at which speeds. These discoveries have not yet been reviewed in an astrobiological context. This paper discusses these findings in the context of Earth analog environments and environments expected to be encountered in the outer Solar System, particularly the jovian and saturnian moons. We also review the imaging technologies capable of recording motility of submicrometer-sized organisms and discuss how an instrument would interface with several types of sample-collection strategies. Key Words: In situ measurement-Biosignatures-Microbiology-Europa-Ice. Astrobiology 16, 755-774.
journal_name
Astrobiologyjournal_title
Astrobiologyauthors
Nadeau J,Lindensmith C,Deming JW,Fernandez VI,Stocker Rdoi
10.1089/ast.2015.1376subject
Has Abstractpub_date
2016-10-01 00:00:00pages
755-774issue
10eissn
1531-1074issn
1557-8070journal_volume
16pub_type
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