30.1 Principles of Microbial Ecology
1. Within the biosphere, ecosystems vary in their biodiversity and biomass.
2. The microenvironment immediately surrounding a microorganism is most relevant to its survival and growth.
1. Primary producers convert carbon dioxide into organic material; consumers utilize the organic materials, directly or indirectly, produced by plants; decomposers digest the remains of primary producers and consumers. (Figure 30.2)
Bacteria in Low Nutrient Environments
1. Microorganisms capable of growing in dilute aqueous solutions are common in nature; often they grow in biofilms.
Microbial Competition and Antagonism
1. Microorganisms in the environment vie for the same limited pool of nutrients. (Figure 30.3)
2. A species may competitively exclude others, or produce compounds that inhibit others.
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