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Related Experiment Video

Updated: Jan 8, 2026

Evaluating the Impact of Hydraulic Fracturing on Streams using Microbial Molecular Signatures
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Functional redundancy enhances microbial resilience in streams: mitigating flow perturbations.

Qiaoyan Lin1, Yixin Zhang2,3, Rob Marrs4

  • 1The XIPU Institution, Xi'an Jiaotong-Liverpool University, Suzhou, Jiangsu, China.

Frontiers in Microbiology
|December 15, 2025
PubMed
Summary
This summary is machine-generated.

Freshwater stream bacteria show resilience to drying and rewetting disturbances. Habitat complexity and microbial networks aid recovery, maintaining ecosystem functions despite changes in bacterial communities.

Keywords:
anthropogenic disturbanceclimate changeecological resilienceflow intermittencehabitat heterogeneitymicrobial network

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Area of Science:

  • Freshwater ecology
  • Microbial ecology
  • Environmental science

Background:

  • Climate change and human activities cause stream drying and habitat loss, threatening freshwater biodiversity.
  • Understanding how stream ecosystems, particularly microbial communities, respond to multiple disturbances is crucial for conservation.
  • The impact of habitat heterogeneity on microbial resilience to drying and rewetting remains understudied.

Purpose of the Study:

  • To investigate the resilience of benthic bacterial communities to drying and rewetting perturbations.
  • To assess the influence of habitat heterogeneity on microbial community composition, ecological networks, and ecosystem functioning.
  • To determine the recovery potential of stream microbial communities after disturbance.

Main Methods:

  • A mesocosm experiment using an ExStream system with benthic biofilm bacteria as bioindicators.
  • Comparison of bacterial communities across three habitat heterogeneity levels and two drying perturbation types.
  • Analysis of bacterial community composition, microbial network complexity, and functional shifts under drying and rewetting conditions.

Main Results:

  • Drying altered bacterial community composition, reducing richness but increasing diversity (Shannon index).
  • Drying induced more complex and vulnerable microbial networks, which were mitigated by flow resumption.
  • Long-term drying shifted microbial functions, impacting specific degraders, with recovery observed upon rewetting.

Conclusions:

  • Benthic bacterial communities exhibit resilience to drying and rewetting disturbances, influenced by habitat heterogeneity.
  • Hydrological connectivity and functionally analogous species within complex microbial networks are key to stability.
  • These findings highlight the importance of maintaining habitat complexity and connectivity for stream ecosystem health.