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Habitat complexity affects microbial growth in fractal maze
Carlos Arellano-Caicedo1, Pelle Ohlsson2, Martin Bengtsson2
1Department of Biology, Lund University, Sölvegatan 35, 223 62 Lund, Sweden.
Current Biology : CB
|March 18, 2023
Summary
Microbial habitats influence microorganism function. Complex microhabitats boost bacterial growth and substrate degradation, while inhibiting fungal growth, impacting nutrient cycling.
Area of Science:
- Microbiology
- Environmental Science
- Ecology
Background:
- Microbial diversity and function are linked to habitat heterogeneity.
- Understanding microscale habitat impacts on microbes is limited.
Purpose of the Study:
- To investigate how spatial habitat complexity affects bacterial and fungal growth, substrate degradation, and interactions.
- To determine the influence of fractal maze complexity on *Pseudomonas putida* and *Coprinopsis cinerea*.
Main Methods:
- Utilized fractal mazes to create a gradient of spatial habitat complexity.
- Monitored growth, substrate degradation, and interactions of *Pseudomonas putida* (bacteria) and *Coprinopsis cinerea* (fungi).
Main Results:
- Complex habitats reduced fungal growth but increased bacterial abundance.
- Bacterial substrate degradation increased with complexity, peaking at an optimal depth.
- Remote maze areas showed decreased bacterial biomass and substrate degradation, suggesting slower turnover.
Conclusions:
- Spatial microstructures significantly affect microbial growth and substrate degradation.
- Enhanced enzymatic activity and resource use efficiency occur in confined spaces.
- Microscale habitat complexity influences nutrient cycling and soil organic carbon storage.
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