2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/23/2019 | 3:00 PM - 3:15 PM | MICROBIAL COMMUNITY AS A BIOMARKER TO REFLECT THE ANTHROPOGENIC LEVEL ON RIVER ECOSYSTEM | 150 DEF
MICROBIAL COMMUNITY AS A BIOMARKER TO REFLECT THE ANTHROPOGENIC LEVEL ON RIVER ECOSYSTEM
Anthropogenic activities (e.g. wastewater discharge and pesticide use) have a great impact on the biotic properties of natural aquatic ecosystems, especially the microbial community. Microbes may also respond to the anthropogenic activities, and thus can potentially be an indicator to reflect the level of anthropogenic activity. Here we integrated flow cytometry, 16S rRNA sequencing and natural organic matter metabolism determination to investigate the microbial biomass, composition, and function in three areas along a gradient of anthropogenic disturbance (less-disturbed mountain area, wastewater-discharged urban area, and pesticide-using agricultural area) in a river ecosystem. Multiple statistical methods were used to explore the causal relationships between the changes in environmental factors and the microbial variation. Results showed that anthropogenic activities (wastewater discharge and agricultural fertilizer) facilitated bacterial production, affected the distribution of dominant species, and accelerated the natural organic matter (NOM) metabolic rate of microbes. After screening the factors characterizing the changes in the microbial communities, we found that the concentration of Cyanobacteria could be used as a diagnostic indicator reflecting the nutrient level. Notably, we developed a NOM metabolic index to quantitatively reflect the holistic influence of nutrients and micropollutants.
- Bacteria
- Periphyton
- Restoration
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Presenters/Authors
Yaohui Bai
(), Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China, yhbai@rcees.ac.cn;
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