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MBY365 Theme 5 summary
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Full summary of theme 5 (microbial communities) made using lecture notes and class notes.
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MICROBIAL COMMUNITY ANALYSISMICROBIAL ECOLOGY
- Reductionism vs. systems ecology
- Microbial diversity
- Lack of ecological principles - macrobes vs. microbes
- New methodology
- How do microbial communities differ from macrobial communities?
- Dispersal - passive and active and global distribution
- Dormancy
- Genetic diversity and phenotypic plasticity
- Short generation times (rapid response)
- Spatial and temporal structure
COMMUNITY ECOLOGY
- Attributes
- Structure
- Function
- Patterns
- Space
- Time
- Studying microbial communities
- Who is present?
- What do they do?
- How do they interact?
- Can we predict interactions and effects?
, DIVERSITY MEASURES
- Inventory diversity - within an environment
- Composition - list of members
- Evenness e.g. Shannon index
- Could be used at any scale - alpha and gamma diversity
- Differentiation diversity - turnover between environments
- Often pairwise comparisons
- Could be used at different scales
- Beta diversity - alpha relative to gamma
- In microbial communities
- Structure variants between communities - how the community looks
and the types and numbers of members across a range of
environments
- Function variants in behaviour and interactions (abiotic and biotic) -
how the community processes substrates, interacts with forces in its
environment and responds to invasion
- Structural properties
- Characterised by the list of members - composition
- Richness of community also considered - how many members are
there
- Measures both composition and abundance of individual members
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