Chapter 9 Microbial Ecology Microbial ecology =? Environmental microbiology The term microbial ecology is now used in a general way to describe the presence and distributions of microorganisms Microbial ecology is the the study of the behavior and activities of microorganisms in their natural environments
Chapter 9 Microbial Ecology Microbial ecology = ? Environmental microbiology The term microbial ecology is now used in a general way to describe the presence and distributions of microorganisms. Microbial ecology is the the study of the behavior and activities of microorganisms in their natural environments
Environmental microbiology, in comparison, relates primarily to all-over microbial processes that occur in a soil, water or food, as examples. It is not concerned with he particular microenvironment where the microorganisms actually are functioning. but with the broader-scale effects of microbial presence and activities
Environmental microbiology, in comparison, relates primarily to all- over microbial processes that occur in a soil, water or food, as examples. It is not concerned with the particular microenvironment where the microorganisms actually are functioning, but with the broader-scale effects of microbial presence and activities
Chapter 9 Microbial Ecology 9.1 Microorganisms in nature ecosystem 9.2 Microbial population interactions 9.3 Biogeochemical cycles 9. 4 Plant-microbe interactions 9.5 Bioremediation
9.1 Microorganisms in nature ecosystem 9.2 Microbial population interactions 9.3 Biogeochemical cycles 9.4 Plant-microbe interactions 9.5 Bioremediation Chapter 9 Microbial Ecology
9.1 Microorganisms in nature ecosystem 1. Microorganisms and microenvironment 2. Terrestrial environments 3. Freshwater Environments 4. Marine environments
9.1 Microorganisms in nature ecosystem 1. Microorganisms and microenvironment 2. Terrestrial Environments 3. Freshwater Environments 4. Marine Environments
9.1.1 Microorganisms and microenvironment populations guilds communities ecosystem
9.1.1 Microorganisms and microenvironment populations guilds communities ecosystem
In a microbial ecosystem individual cells grow to form populations Metabolically related populations constitute groupings called guilds Sets of guilds conducting complementary physiological processes interact to form microbial communities
Metabolically related populations constitute groupings called guilds. Sets of guilds conducting complementary physiological processes interact to form microbial communities. In a microbial ecosystem individual cells grow to form populations
O○○ O○ ○ Individual Population
Community 2 Community 1 Oxic zone- Photic zone Chemoorganotrophic cyanobacteria and algae bacteria CH1206+602→ 6CO2+6H2O一 6C02+6H2O cH12O6+602 Sediments Anoxic zone
Community 3 1. Guild 1: methanogenic bacteria(CO2-CH4) homoacetogenic bacteria(CO2- acetate) 2. Guild 2: sulfate-reducing bacteria(S0,2- +H2S) sulfur-reducing bacteria(S→H 3. Guild 3: denitrifying bacteria(NO, N2) ferric iron-reducing bacteria (Fe→Fe2) 4. Guild 4: fermentative bacteria(fermenting sugars amino and fatty acids, Community 3 and so on) Sediments
Community 3
Microbial communities then interact with communities of macroorganisms to define the entire ecosystem
Microbial communities then interact with communities of macroorganisms to define the entire ecosystem