Lecture 16 - Microbial Ecology Flashcards Preview

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Flashcards in Lecture 16 - Microbial Ecology Deck (23)
1

The separation of individual organisms from the mixed community

isolation

2

Select for desired organisms through manipulation of medium and incubation conditions

enrichment cultures

3

The sample from which microorganisms will be isolated

inocula

4

Microorganisms cultured in the lab are frequently only minor components of the microbial ecosystem

enrichment bias

5

The sum total of all organisms and abiotic factors in a particular environment

ecosystem

6

Portion of an ecosystem where a community could reside

habitat

7

One member in the relationship is harmed and the other benefits

parasitism

8

both species benefit

mutualism

9

One species benefits and the other is neither harmed nor helped

commensalism

10

the total number of different species present

species richness

11

the proportion of each species in an ecosystem

species abundance

12

Metabolically related microbial populations

guilds

13

Habitat shared by a guild

niche

14

what are two important features of surfaces for bacteria?

1) attachment , 2) provide nutrients

15

Assemblages of bacterial cells adhered to a surface and enclosed in an adhesive matrix excreted by the cells

biofilm

16

what is a biofilm matrix usually composed of?

polysaccharides

17

oxygenic phototrophs suspended freely in water

phytoplankton

18

attached to the bottom or sides of a lake or stream

benthic species

19

The microbial oxygen-consuming capacity of a body of water

biochemical oxygen demand (BOD)

20

the most important producer of photosynthesis

Prochlorococcus

21

what are the most abundant microorganisms in the oceans

viruses

22

deep sea microbes that are cold-loving

psychrophilic

23

deep sea microbes that are pressure-loving

piezophilic