prokaryotic microorganisms in their natural habitats - water

Question 1

what bacteria is utilised in the epilimnion?

Answer 1

in water, oxygenic photosynthesis by cyanobacteria in the epilimnion generates oxygen (O2) and minerals for aquatic life.

Question 2

what bacteria is utilised in the hypolimnion?

Answer 2

in the hypolimnion, anoxygenic photosynthesis by purple & green sulphur bacteria generate biomass in oxygen depleted environments - the biomass can be used as nutrients for other organisms.

Question 3

what is the role of anaerobic decomposers in the hypolimnion?

Answer 3

anaerobic decomposers breakdown dead and decaying matter contributing to nutrient cycling and redistribution of these nutrients during the autumn overturn.

Question 4

what are the detrimental effects of bacteria in water?

Answer 4

water is a common medium used to spread infections.
* typhoid fever
* shigellosis
* cholera
* campylobacteriosis

Question 5

what bacteria causes typhoid fever?

Answer 5

typhoid fever is caused by a Gram-negative rod, salmonella typhi.

Question 6

what bacteria causes shigellosis?

Answer 6

shigellosis is caused by a Gram-negative rod, shigella.

Question 7

what bacteria causes cholera?

Answer 7

cholera is caused by the Gram-negative rod, vibrio cholerae.

Question 8

what bacteria causes campylobacteriosis?

Answer 8

campylobacteriosis is caused by a curved, Gram-negative rod called campylobacter jejuni.