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EBM811S - ENVIRONMENTAL BIOLOGY AND AQUATIC ECOSYSTEM MAN - 1ST OPP - JUNE 2023 |
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r
n Am I BI A u n IVER s I TY
OF SCIEnCE AnDTECHnOLOGY
FACULTY OF HEALTH, NATURAL RESOURCESAND APPLIED SCIENCES
SCHOOL OF NATURAL AND APPLIED SCIENCES
DEPARTMENT OF BIOLOGY, CHEMISTRY AND PHYSICS
QUALIFICATION: BACHELOROF SCIENCEHONOURS
QUALIFICATION CODE: 08BOSH
COURSE CODE: EBM811S
SESSION: JUNE 2023
LEVEL: 8
COURSE NAME: ENVIRONMENTAL
BIOLOGYAND AQUATIC ECOSYSTEM
MANAGEMENT
PAPER: THEORY
DURATION: 3 HOURS
MARKS: 100
EXAMINER (S):
MODERATOR:
FIRST OPPORTUNITY EXAMINATION PAPER
Dr. Edosa Omoregie
Dr. Naftal Gabriel
INSTRUCTIONS
1. Answer all questions
2. Write clearly and neatly
3. Number your answers clearly
PERMISSIBLEMATERIAL
Scientific Calculator
THIS EXAMINATION PAPER CONSISTS OF 3 PAGES
(Including this front page)
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Question 1
[20]
a). What are the parts labelled as A, B, C, D, E, F, G and H the parts the two aquatic macroinvertebrates
shown in the diagrams below?
(4)
B
C
A: ________
_
B: ________
_
C: ________
_
,!
A .f,',..
D
'ft~~
.
~--~...
D: ________
_
E: ________
_
F: ________
_
G: ________
_
H: ________
_
b). Identify the Order, common names and pollution status of the 4 aquatic macroinvertebrates in the
diagram below:
(12)
,)....
,:-::J
.'.,i
/:?li\\t.;~)
J\\1'~'
!J
l,
A
B
C
D
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)
BOD (mg/I)
2 or below
3-5
6-9
Above 100
Water Quality
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Question 2
a) With reference to physical and biological properties, discuss the erosional and
depositional ecological habitat types of the river system.
[20]
(10)
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.
(10)
Question 3
a) Critically review the environmental
biodiversity of the river system.
[20]
effects of acid mine drainage on the chemistry and
(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) As a manager in a government agency responsible for the conservation and management
of protected wetlands, briefly review the various criteria for the designation of wetlands
of international importance based on the Ramsar Convention Guidelines.
(10)
b) Critically review the environmental impacts of global warming on the physical, chemical
and biodiversity of the aquatic environment.
(10)
Question 5
[20]
a) What is remote sensing? Briefly explain the application and benefits of geographic
information systems in natural resource management.
{10)
b) What is cultural eutrophication? Discuss the effect of cultural eutrophication on the
aquatic ecosystem.
(10)
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