Rewetting the hyper-arid Atacama Desert soil reactivates a carbon-starved microbial decomposer community and also triggers archaeal metabolism
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| Title: | Main Title: Rewetting the hyper-arid Atacama Desert soil reactivates a carbon-starved microbial decomposer community and also triggers archaeal metabolism |
| Description: | Abstract: Extreme environmental conditions make soils of the hyper-arid Atacama Desert one of the most hostile habitats for life on the planet. During the short intervals of moisture availability that occur, it remains unresolved how soil microorgan- isms physiologically respond to such dramatic environmental changes. Therefore, we simulated a precipitation event – without (H2O) and with (H2O + C) labile carbon (C) supplementation – and investigated the responses in microbial communities (using phospholipid fatty acids (PLFAs) and archaeal glycerol dialkyl glycerol tetraether (GDGTs)) and physiology (by means of respiration, bacterial and fungal growth and C-use efficiency (CUE)) during a five-day incu- bation. We demonstrated that bacterial and fungal growth does occur in these extreme soils following rewetting, albeit at 100–10,000-fold lower rates compared to previously studied soil systems. C supplementation increased levels of bacterial growth and respiration responses by 5- and 50-fold, respectively, demonstrating a C-limited microbial de- composer community. While the microbial CUE following rewetting was c. 14 %, the addition of labile C during rewetting resulted in a substantial reduction (c. 1.6 %). Consistent with these interpretations, the PLFA composition clearly shifted from saturated towards more unsaturated and branched PLFAs, which could arise from (i) a physiolog- ical adaptation of the cell membrane to changing osmotic conditions or (ii) a community composition shift. Significant increases in total PLFA concentrations were solely found with H2O + C addition. Contrary to other recent studies, we found evidence for a metabolically active archaeal community in these hyper-arid soils upon rewetting. We conclude that (i) microorganisms in this extreme soil habitat can be activated and grow within days following rewetting, (ii)available C is the limiting factor for microbial growth and biomass gains, and (iii) that an optimization of tolerating the extreme conditions while maintaining a high CUE comes at the expense of very poor resource-use efficiency during high resource availability. |
| Identifier: | https://doi.org/10.1016/j.scitotenv.2023.164785. (DOI) |
| Citation Advice: | Rosinger, C., Rousk, J., Bonkowski, M., Rethemeyer, J., and Jaeschke, A. (2023). Rewetting the hyper-arid Atacama Desert soil reactivates a carbon-starved microbial decomposer community and also triggers archaeal metabolism. Science of the Total Environment 892, 164785. |
Responsible Party
| Creators: | Christoph Rosinger (Author), Johannes Rousk (Author), Michael Bonkowski (Author), Janet Rethemeyer (Author), Andrea Jaeschke (Author) |
| Funding Reference: | Deutsche Forschungsgemeinschaft (DFG): CRC 1211: Earth - Evolution at the Dry Limit |
| Publisher: | Elsevier |
| Publication Year: | 2023 |
Topic
| CRC1211 Topic: | Biology |
| Related Subproject: | D4 |
| Subjects: | Keywords: Organic Geochemistry, Geobiology, Soil Sciences |
| Geogr. Information Topic: | Biota |
File Details
| Filename: | Rosinger2023.pdf |
| Data Type: | Data Paper - Article |
| File Size: | 1.4 MB |
| Date: | Accepted: 07.06.2023 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Free |
| General Access and Use Conditions: | According to the CRC1211DB data policy agreement. |
| Access Limitations: | According to the CRC1211DB data policy agreement. |
| Licence: | [Creative Commons] Attribution 4.0 International (CC BY 4.0) |
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Specific Information - Publication
| Publication Status: | Peer-Reviewed |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Science of the Total Environment |
| Source Website: | www.elsevier.com/locate/scitotenv |
| Volume: | 892 |
| Number of Pages: | 8 (1 - 8) |
Metadata Details
| Metadata Creator: | Andrea Jaeschke |
| Metadata Created: | 20.06.2023 |
| Metadata Last Updated: | 20.06.2023 |
| Subproject: | D4 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 61 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 0 |
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