FABS 210 Lecture Notes - Lecture 12: Proteobacteria, Ecological Niche, Rhizosphere

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Habitat-portion of an ecosystem where a community could reside. Niche - is a microenvioment where all resources conditions are met. Bio lm - a groupment of the individual species. Assemblages of bacterial cells adhered to a surface and enclosed in a adhesive matrix excreted by the cells. All the cells is one bio lm do not have the same functions. The outside cells protect the function of the bio lm, regulator functions. The growth in the bio lm is time related , the number of cells will increase day by day. There is maturity which is when the growth stops, vegetative to reproductive stage. The bio lm stops growing when the oldest cells start to die. Phototaxi ( taxi is movement ) movement of organisms attracted by light. Allow cells to remain in a favourable niche. Allows bacterial cells to i"ve in close association with one another. Microbial mats - very thick multilayered microbial deposits.

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