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NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
JUNE/JULY 2013 EXAMINATION

COURSE CODE: ESM 424

COURSE TITLE: FRESHWATER ECOLOGY

TIME ALLOWED: 2 hours

INSTRUCTION: Answer 4 questions only

 

  1. Discuss the four main constituents of the living environment that form the fresh water ecosystem. (17½ marks).

 

 

  1. Aquatic organisms can be classified into four major groups, each varying in their biological characteristics, habitat, and adaptations. Examine these groups and their relationships with one another.(17½ marks)

 

  1. Explain the temperature related factors affecting the functioning of any fresh water ecosystem (17½ marks)

 

  1. Discuss the major factors that affect the concentration of oxygen in lentic fresh water communities (17½ marks)

 

  1. Discuss the various ways through which man may interfere with fresh water communities(17½ marks)

 

  1. Identify and explain the possible strategies for the management of fresh water ecosystem (17½ marks)

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