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Using Dirichlet tessellation to help estimate microbial biomass concentrations
1United States Environmental Protection Agency, Water Supply and Water Resources Division, 26 West Martin Luther King Drive, Cincinnati, OH 45268, USA. dugan.nicholas@epa.gov
Journal of Microbiological Methods
|June 7, 2005
Summary
Microscopy with Dirichlet tessellation offers a novel method for quantifying microbial biomass. This technique accurately estimates cyanobacteria concentrations, correlating well with established methods like chlorophyll a and Coulter counts.
Area of Science:
- Microbiology
- Ecology
- Biotechnology
Background:
- Accurate microbial biomass quantification is crucial for ecological and biotechnological applications.
- Traditional methods may have limitations in specific contexts or require specialized equipment.
Purpose of the Study:
- To introduce and validate Dirichlet tessellation combined with microscopy for microbial biomass estimation.
- To assess the accuracy of this method using morphologically distinct cyanobacteria species.
Main Methods:
- Dirichlet tessellation applied to microscope well slides for spatial analysis.
- Quantification of cyanobacteria (Microcystis aeruginosa, Anabaena flos aquae) biomass.
- Empirical validation against chlorophyll a analysis and Coulter counts.
Main Results:
- Microscopy/Dirichlet tessellation provided reliable biomass estimates for cyanobacteria.
- Estimates showed significant correlation with chlorophyll a and Coulter count results.
- The method proved effective for morphologically distinct species.
Conclusions:
- Dirichlet tessellation is a viable and accurate method for microbial biomass quantification using microscopy.
- This approach offers a complementary or alternative tool for microbial ecology studies.
- The validated method enhances the ability to measure cyanobacteria biomass.