Question 2
[20]
a) In atabular form only, explain the main differences between a lotic and a lentic aquatic
system.
(10)
b) With reference to physical and biological properties, discuss the erosional and
depositional ecological habitat types of the river system.
(10)
Question 3
[20]
a) Briefly describe the following processes and their application in the treatment of
wastewater:
(6)
i. Sedimentation
ii. Filtration
iii. Disinfection
b) What is cultural eutrophication? Discuss the effect of cultural eutrophication on the
physical, chemical and biodiversity of aquatic environment.
(14)
Question 4
[20]
Living organisms play an important role in the recycling of many elements within an
ecosystem. Discuss how bacteria and their biochemical reactions contribute to the recycling
of nitrogen in the aquatic ecosystem.
(20)
Question 5
[20]
a) Review the various criteria for the designation of wetlands of international importance
based on The Ramsar Convention Guidelines.
(10)
b) Explain the term aquaponic and its ecological importance. Briefly discuss the benefits of
aquaponic to the sustenance of the environment.
(10)