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Theoretical Ecology Question Paper

Theoretical Ecology

Course:Bachelor Of Education Science

Institution: Kenyatta University question papers

Exam Year:2009

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2009/2010
FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF
EDUCATION AND BACHELOR OF SCIENCE

SZL 411:
THEORETICAL ECOLOGY

DATE: Wednesday, 23rd December, 2009
TIME: 11.00 a.m. – 1.00 p.m.
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INSTRUCTIONS:
Maximum marks are in proportion to the recommended times to be spent on each section.
Within each section, all questions carry equal marks.
Illustrate your answer with diagrams and give examples where appropriate
SECTION A:
Answer ALL questions (40 marks)
1.
Explain the parameters of the basic logistic model
2.
Outline the effects of intraspecific competition at individual and population levels
3.
Describe briefly the factors that favour persistence of metapopulations
4.
Explain the biological meaning of Ro. What effect does it have on the population if its value is
Ro<1
Ro>1
Ro=1
5.
Explain how survivorship and mortality curves are created
6.
State the difference between density dependent and density independent mortality. Which of the graphs at the back of this question paper show density dependent and density independent mortalities?
7.
“Models and reality are linked together by two processes : abstraction and interpretation”. Explain this statement
8.
State three ecological processes described by the Leslie matrix model giving two major characteristics of this model.

SECTION B:
Answer ONE question (30 marks)
9.
Write an essay entitled “coexistence of predator and prey”
10.
Discuss factors that affect community structure and diversity.

Theoretical Ecology Question Paper

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