Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Cheaters, diffusion and nutrients constrain decomposition by microbial enzymes in spatially
 

Summary: LETTER
Cheaters, diffusion and nutrients constrain
decomposition by microbial enzymes in spatially
structured environments
Steven D. Allison
Department of Ecology and
Evolutionary Biology, University
of California, Irvine, CA 92697,
USA
Correspondence: E-mail:
allisons@uci.edu
Abstract
Extracellular enzymes allow microbes to acquire carbon and nutrients from complex
molecules and catalyse the rate-limiting step in nutrient mineralization. Because the
factors regulating enzyme production are poorly understood, I used a simulation model
to examine how competition, nutrient availability and spatial structure affect microbial
growth and enzyme synthesis. In simulations where enzyme-producing microbes
competed with cheaters (who do not synthesize enzymes but take-up product), higher
enzyme costs favoured cheaters, while lower rates of enzyme diffusion favoured
producers. Cheaters and producers coexisted in highly organized spatial patterns at

  

Source: Allison, Steven D. - Departments of Ecology and Evolutionary Biology & Earth System Science, University of California, Irvine

 

Collections: Environmental Sciences and Ecology