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  Machine Learning Algorithms Applied to Identify Microbial Species by Their Motility

Riekeles, M., Schirmack, J., Schulze-Makuch, D. (2021): Machine Learning Algorithms Applied to Identify Microbial Species by Their Motility. - Life, 11, 1, 44.
https://doi.org/10.3390/life11010044

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Riekeles, Max1, Autor
Schirmack, Janosch1, Autor
Schulze-Makuch, Dirk2, Autor              
Affiliations:
1External Organizations, ou_persistent22              
23.7 Geomicrobiology, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146043              

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Schlagwörter: machine learning; motility; biosignature; automation; species identification; life detection
 Zusammenfassung: (1) Background: Future missions to potentially habitable places in the Solar System require biochemistry‐independent methods for detecting potential alien life forms. The technology was not advanced enough for onboard machine analysis of microscopic observations to be performed in past missions, but recent increases in computational power make the use of automated in‐situ analyses feasible. (2) Methods: Here, we present a semi‐automated experimental setup, capable of distinguishing the movement of abiotic particles due to Brownian motion from the motility behavior of the bacteria Pseudoalteromonas haloplanktis, Planococcus halocryophilus, Bacillus subtilis, and Escherichia coli. Supervised machine learning algorithms were also used to specifically identify these species based on their characteristic motility behavior. (3) Results: While we were able to distinguish microbial motility from the abiotic movements due to Brownian motion with an accuracy exceeding 99%, the accuracy of the automated identification rates for the selected species does not exceed 82%. (4) Conclusions: Motility is an excellent biosignature, which can be used as a tool for upcoming lifedetection missions. This study serves as the basis for the further development of a microscopic life recognition system for upcoming missions to Mars or the ocean worlds of the outer Solar System.

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 Datum: 2021-01-122021
 Publikationsstatus: Final veröffentlicht
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 Identifikatoren: DOI: 10.3390/life11010044
GFZPOF: p4 T5 Future Landscapes
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Titel: Life
Genre der Quelle: Zeitschrift, SCI, Scopus, oa
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Seiten: - Band / Heft: 11 (1) Artikelnummer: 44 Start- / Endseite: - Identifikator: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/20200429
Publisher: MDPI