713 Lecture 1. Microbial biogeography and diversity. “Everything is everywhere, the environment selects”. Everything is everywhere?. Pros. Cons. Pros High dispersal rate (?) Extremely fine partitioning of the environment Extreme abundance ??
Microbial biogeography and diversity
High dispersal rate (?)
Extremely fine partitioning of the environment
Extreme resistance to variable conditions; dormancy, spores
Side effect: ease of study because they’re everywhere
Blurring of species identity by HGT/LGT (horizontal gene transfer)
Not all environments can be alike (e.g. temperature, pH, pressure, elevation)
Past measurements of diversity too coarse
Dispersal not as efficient as once thought
There is a difference between short-term presence and persistence following dispersal
Limited previous knowledge of species diversity
Inadequacy of prior methods (culture-dependent)Pros and cons, bacterial ubiquity
What about in more extreme environments?