Microbial Communities Are Well Adapted to Disturbances in Energy Input.

Area of Science:

• Microbial Ecology
• Ecosystem Dynamics

Background:

• Microbial systems offer insights into ecological theory, but responses to long-term periodic perturbations are poorly understood.
• Diel oscillations are the primary focus, leaving longer cycles understudied.

Purpose of the Study:

• To investigate methanotrophic microbial community adaptation to periodic energy input disturbances over 20-day cycles.
• To compare community dynamics under continuous versus cyclic chemical energy supply over 510 days.

Main Methods:

• Utilized a long-term microcosm experiment.
• Employed bacterial 16S rRNA gene sequencing.
• Quantified microbial abundance and ecosystem function.

Main Results:

• Microbial communities demonstrated inherent adaptation to energy input disturbances.
• Community structure changes were primarily driven by internal dynamics, not external forcing.
• The rare biosphere played a crucial role in initiating internal community dynamics.

Conclusions:

• Internal feedbacks are more influential than external drivers in shaping microbial community dynamics.
• Ecosystems can maintain functional stability despite dynamic, seemingly unstable community structures.
• Understanding internal dynamics is vital for microbiome manipulation in various ecosystems.