Document Type
Article
Publication Date
1-7-2025
Abstract
Lake Sentani is a tropical lake in Indonesia, consisting of four interconnected sub-basins of different water depths. While previous work has highlighted the impact of catchment composition on biogeochemical processes in Lake Sentani, little is currently known about the microbiological characteristics across this unique ecosystem. With recent population growth in this historically rural area, the anthropogenic impact on Lake Sentani and hence its microbial life is also increasing. Therefore, we aimed to explore the influence of environmental and anthropogenic factors on the microbial diversity of Lake Sentani. Here, we present a detailed microbiological evaluation of Lake Sentani, analyzing 49 different sites across the lake, its tributary rivers and their river mouths to assess diversity and community structure using 16S rRNA gene sequencing. Our results reveal distinct communities in lake and river sediments, supporting the observed geochemical differences. Taxonomic assessment showed the potential impact of anthropogenic pressure along the northern, urbanized shore, as river and river mouth samples revealed high abundances of Bacteroidota, Firmicutes, and Cyanobacteria, which could be attributed to pollution and eutrophication. In contrast, lake sediment communities were dominated by Thermodesulfovibrionia, Methanomethylicia, Bathyarchaeia, and Thermoplasmata, suggesting sulfate reducing, thermophilic, acidophilic bacteria and methanogenic archaea to play an important role in tropical lake systems. This study provides novel insights into ecological functions of tropical lakes and contributes to the optimization of management strategies of Lake Sentani, ensuring its holistic preservation in the future.
Recommended Citation
Nomosatryo, Sulung; Lipus, Daniel; Bartholomäus, Alexander; Henny, Cynthia; Ridwansyah, Iwan; Sujarta, Puguh; Yang, Sizhong; Wagner, Dirk; and Kallmeyer, Jens, "The Role of Anthropogenic Influences on a Tropical Lake Ecosystem and Its Surrounding Catchment: A Case Study of Lake Sentani" (2025). College of Life Sciences Faculty Papers. Paper 21.
https://jdc.jefferson.edu/jclsfp/21
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Language
English
Included in
Environmental Microbiology and Microbial Ecology Commons, Terrestrial and Aquatic Ecology Commons
Comments
This article is the author's final published version in FEMS microbiology ecology, Volume 101, Issue 1, January 2025, Article number fiae162.
The published version is available at https://doi.org/10.1093/femsec/fiae162.
Copyright © The Author(s) 2024