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pH Drives Differences in Bacterial Community β-Diversity in Hydrologically Connected Lake Sediments
Haiguang Pu1,2, Yuxiang Yuan1, Lei Qin1
1Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.
Microorganisms
|March 29, 2023
Summary
Microbial communities in Xingkai Lake sediments are influenced by environmental factors. Higher pH levels were found to decrease bacterial community diversity, offering insights for lake ecosystem protection.
Area of Science:
- Environmental Microbiology
- Lake Sediment Ecology
- Microbial Community Structure
Background:
- Lake sediment microbial communities are sensitive indicators of environmental health.
- Understanding microbial diversity is crucial for lake ecosystem protection and sediment status assessment.
- Xingkai Lake basin faces pressures from agricultural practices and human activities.
Purpose of the Study:
- To investigate the physicochemical properties and bacterial community structure in sediments of Xiao Xingkai Lake and Xingkai Lake.
- To analyze the relationship between sediment properties and bacterial community diversity across different hydrological regions.
- To identify key environmental factors influencing bacterial community assembly in lake sediments.
Main Methods:
- High-throughput sequencing of bacterial communities in surface sediments.
- Analysis of physicochemical properties including nutrients and carbon content.
- Statistical analyses including Non-metric multidimensional scaling (NMDS) and Partial Least Squares Path Analysis (PLS-PA).
Main Results:
- Significant enrichment of nutrients (nitrogen, phosphorus) and carbon (DOC, LOC, TC) in the XXLD region.
- Proteobacteria, Firmicutes, and Bacteroidetes were the dominant bacterial phyla.
- Bacterial community structure (β-diversity) varied significantly among regions, driven by environmental factors.
- Higher pH was identified as the primary factor reducing bacterial community β-diversity.
Conclusions:
- Sediment environmental factors, particularly pH, play a critical role in shaping bacterial community assembly and diversity in Xingkai Lake.
- Higher pH levels lead to decreased bacterial community β-diversity in lake sediments.
- This study provides valuable data for future research on sediment microorganisms and lake ecosystem management in the Xingkai Lake basin.
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