2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2019 | 9:45 AM - 10:00 AM | BACTERIAL SUCCESSION IN HEADWATER BIOFILMS | 151 ABC
BACTERIAL SUCCESSION IN HEADWATER BIOFILMS
Microbial biofilms are vital components of nutrient uptake and cycling processes in freshwater ecosystems, but we are still learning how microbes colonize and develop to mature biofilms in stream waters. We evaluated succession of microbial communities initiated in both summer and winter in a well-studied catchment in southeastern Pennsylvania, USA. High throughput sequencing of 16S rRNA genes suggested distinct biofilm structures starting from different seasons. Phototrophic and heterotrophic microbes showed different strategies, with a higher percentage (62.94%) of chloroplasts in winter-initiated biofilms but higher abundance of Proteobacteria (60.22%) in summer-initiated samples in the first month. Interestingly, after the first month both summer and winter-initiated successions had similar community composition, indicating tendency and stability of the internal community structure. Network analysis showed more robust correlations between algae and Cyanobacteria with heterotrophic bacteria in winter than in summer, especially for the first month, suggesting a strong competition for habitats. Results from this study have identified unique roles of phototrophic and heterotrophic bacteria in early and later stages of succession in freshwater streams, which is a key part for understanding ecological roles of microbes in freshwater as well as global aquatic ecosystems.
- Biodiversity
- Distribution
- Microbial
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Presenters/Authors
Jinjun Kan
(), Stroud Water Research Center, jkan@stroudcenter.org;
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Jing Wang
(), Stroud Water Research Center, jwang_hku@163.com;
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Marc Peipoch
(), Stroud Water Research Center, mpeipoch@stroudcenter.org;
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Raven Bier
(), Stroud Water Research Center, rbier@stroudcenter.org;
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