Lecture 16 - Microbial Ecology Flashcards
The separation of individual organisms from the mixed community
isolation
Select for desired organisms through manipulation of medium and incubation conditions
enrichment cultures
The sample from which microorganisms will be isolated
inocula
Microorganisms cultured in the lab are frequently only minor components of the microbial ecosystem
enrichment bias
The sum total of all organisms and abiotic factors in a particular environment
ecosystem
Portion of an ecosystem where a community could reside
habitat
One member in the relationship is harmed and the other benefits
parasitism
both species benefit
mutualism
One species benefits and the other is neither harmed nor helped
commensalism
the total number of different species present
species richness
the proportion of each species in an ecosystem
species abundance
Metabolically related microbial populations
guilds
Habitat shared by a guild
niche
what are two important features of surfaces for bacteria?
1) attachment , 2) provide nutrients
Assemblages of bacterial cells adhered to a surface and enclosed in an adhesive matrix excreted by the cells
biofilm
