Peat Properties, Dominant Vegetation Type and Microbial Community Structure in a Tropical Peatland

Girkin, N. T.; Lopes dos Santos, R. A.; Vane, C. H.; Ostle, N.; Turner, B. L.; Sjögersten, S.

Abstract

Tropical peatlands are an important carbon store and source of greenhouse gases, but the microbial component, particularly community structure, remains poorly understood. While microbial communities vary between tropical peatland land uses, and with biogeochemical gradients, it is unclear if their structure varies at smaller spatial scales as has been established for a variety of peat properties. We assessed the abundances of PLFAs and GDGTs, two membrane spanning lipid biomarkers in bacteria and fungi, and bacteria and archaea, respectively, to characterise peat microbial communities under two dominant and contrasting plant species, Campnosperma panamensis (a broadleaved evergreen tree), and Raphia taedigera (a canopy palm), in a Panamanian tropical peatland. The plant communities supported similar microbial communities dominated by Gram negative bacteria (38.9–39.8%), with smaller but significant fungal and archaeal communities. The abundance of specific microbial groups, as well as the ratio of caldarchaeol:crenarchaeol, isoGDGT: brGDGTs and fungi:bacteria were linearly related to gravimetric moisture content, redox potential, pH and organic matter content indicating their role in regulating microbial community structure. These results suggest that tropical peatlands can exhibit significant variability in microbial community abundance even at small spatial scales, driven by both peat botanical origin and localised differences in specific peat properties.

Citation

Girkin, N. T., Lopes dos Santos, R. A., Vane, C. H., Ostle, N., Turner, B. L., & Sjögersten, S. (2020). Peat Properties, Dominant Vegetation Type and Microbial Community Structure in a Tropical Peatland. Wetlands, 40, 1367–1377. https://doi.org/10.1007/s13157-020-01287-4

• Journal Article Type: Article
• Acceptance Date: Mar 6, 2020
• Online Publication Date: Apr 20, 2020
• Publication Date: Oct 1, 2020
• Deposit Date: Jan 17, 2024
• Publicly Available Date: Jan 17, 2024
• Journal: Wetlands
• Print ISSN: 0277-5212
• Electronic ISSN: 1943-6246
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 40
• Pages: 1367–1377
• DOI: https://doi.org/10.1007/s13157-020-01287-4
• Public URL: https://nottingham-repository.worktribe.com/output/4407956
• Publisher URL: https://link.springer.com/article/10.1007/s13157-020-01287-4
• Additional Information: Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.