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EBM811S - ENVIRONMENTAL BIOLOGY AND AQUATIC ECOSYSTEM MANAGEMENT - 1st opp - JUNE 2022 |
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NAMIBIA UNIVERSITY
OF SCIENCE AND TECHNOLOGY
FACULTY OF HEALTH, APPLIED SCIENCES AND NATURAL RESOURCES
DEPARTMENT OF NATURAL AND APPLIED SCIENCES
QUALIFICATION: BACHELOR OF SCIENCE HONOURS
QUALIFICATION CODE: 08BOSH
COURSE CODE: EBM811S
SESSION: JUNE 2022
LEVEL: 8
COURSE NAME: ENVIRONMENTAL
BIOLOGY AND AQUATIC ECOSYSTEM
MANAGEMENT
PAPER: THEORY
DURATION: 3 HOURS
MARKS: 100
FIRST OPPORTUNITY EXAMINATION QUESTION PAPER
EXAMINER (S): | Dr. Edosa Omoregie
MODERATOR:
Dr. Naftal Gabriel
INSTRUCTIONS
1. Answer all questions
2. Write clearly and neatly
3. Number your answers clearly
PERMISSIBLE MATERIAL
Scientific Calculator
THIS QUESTION PAPER CONSIST OF 3 PAGES
(Including this front page)
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Question 1
a). What are the parts labelled as A, B, C,D, E, F, GandH
shown in the diagrams below?
[20]
the parts the two aquatic macroinvertebrates
(4)
b). Identify the order, common names and pollution status of the 4 aquatic macroinvertebrates in the
diagram below:
(12)
$
af*e
Specimen
A
B
C
D
Order
Common
name
Pollution
status
c). The level of biochemical oxygen demand (BOD) in an aquatic system is used in determining
the water quality (pollution status) of the system. Using the table below, state the water
quality of the various BOD levels indicated.
(4)
OD (mg/I)
or below
-5
-9
ove 100
ater Qual
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Question 2
[20]
a) With reference to suitable examples, discuss the various factors affecting biodiversity of
fringing communities of the aquatic ecosystem.
(8)
b) With the aid of graphic illustration and suitable examples, discuss the effects of the
introduction of raw sewage on the biology and chemistry of a river system.
(12)
Question 3
[20]
a) Critically review the environmental effects of acid mine drainage on the chemistry and
biodiversity of the river system.
(10)
b) With reference to solid removal, mineralization of organic materials and deactivation of
pathogens, discuss the treatment of wastewater and organic sewage.
(10)
Question 4
[20]
a) What is remote sensing? Briefly explain the application and benefits of geographic
information system in natural resource management.
(10)
b) As a manager in a government protected wetland establishment, discuss any five (5) of
the principles and their management strategies involved in the restoration of a protected
wetland.
(10)
Question 5
[20]
a) Briefly explain the various sources of carbon dioxide in the atmosphere.
(10)
b) Critically review the environmental impacts of global warming on the physical, chemical
and biodiversity of aquatic environment.
(10)