Microbial Interactions Flashcards
1
Q
Populations
A
assemblages of similar organisms
2
Q
Communities
A
mixtures of different populations
3
Q
Ecosystems
A
self-regulating biological communities and their physical environment
4
Q
Symbioses
A
relationships among organisms in an ecosystem
5
Q
Ectosymbiont
A
located on the surface of another larger organism
6
Q
Consortium
A
physical contact between different organisms of similar size
biofilm
7
Q
Endosymbiont
A
located within another organism
8
Q
Ecto/endosymbiosis
A
lives both inside and outside of another organism
9
Q
Mutualism
A
- two organisms that cannot live without one another
- Metabolically dependent on each other
Buchnera aphidicola and aphids
Rumen microbes and Ruminants
10
Q
Cooperation
A
- both organisms benefit from living with each other but can also exist apart from each other
- syntrophism
- Chromatium provides organic matter and Desulfovibrio provides CO2 and H2S
11
Q
Syntrophism
A
growth of one organism depends on or is improved by growth factors or nutrients from another organism growing nearby
12
Q
Commensalism
A
- one organism benefits and the other is neither harmed nor helped
- can also be syntrophic
- Nitrosomonas and Nitrobacter
- E.coli and Bacteriodes
13
Q
Predation
A
- one organism gains and the other is harmed
- predator engulfs or attacks the prey
- some protists, bacteria, fungi
14
Q
Parasitism
A
- one organism gains (parasite) and the other is harmed (host)
- slower process than predation
- viruses, fungi, lichens
15
Q
Amensalism
A
- negative impact of one organism on another based on release of a specific compounds
- antibiotics by bacteria and fungi
- bacteriocins
- organic acids during fermentation
