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Ens 230: Principles Of Environmental Ecology Question Paper

Ens 230: Principles Of Environmental Ecology

Course:Principles Of Environmental Ecology

Institution: Kenyatta University question papers

Exam Year:2012

KENYATTA UNIVERSITY

UNIVERSITY EXAMINATIONS 2012/2013

FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF ENVIRONMENTAL SCIENCE

ENS 230: PRINCIPLES OF ENVIRONMENTAL ECOLOGY

DATE: Tues 27 Nov 2012 TIME: 8:00am-10:00am

INSTRUCTIONS:

1. Answer question ONE and any other THREE
2. Illustrate your answer with suitable examples, diagrams and figures wherever appropriate.

Q1. a) Explain the causes of global warming, and its possible effects on different ecosystems
(15mks)

b) Discuss energy flow in the ecosystem and its role in the ecosystem productivity
(10mks)

Q2. With the aid of diagrams, demonstrate the nitrogen cycle and outline the effect of human activity to its stability.
(15mks)

Q3. Discuss various ecological factors found in terrestrial forest ecosystems.
(15mks)

Q4. Discuss the following:

a) Parasitism (5mks)

b) Detrital food chain (5mks)

c) Impacts of human activities on phosphorous cycle (5mks)

Q5. Outline the pressures on aquatic ecosystems and discuss their causes (15mks)

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