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Semester I Examinations 2010 / 2011
Exam Code(s) 4MR2
Exam(s) 4th B.Sc. Marine Science (Hons)
Module Code(s) MR420/MR401/BT422
Module(s) Advanced Topics Paper 1
External Examiner(s) Prof. Richard Thompson
Internal Examiner(s) Dr Martin White and other internal examiners
Instructions: Answer FOUR questions, ONE from each section.
(allow approximately 45 minutes per question)
All questions are equally weighted. Use a separate answer book for each section.
Duration 3 hours
No. of Pages 2
Department(s) Botany, Zoology
1. With reference to nutrient exchange, describe the salt marsh ecosystem, and its
contribution to, the estuarine environment
2. Describe the principal environmental factors that affect plant communities in a mangrove
ecosystem. Refer to the distribution of key species in relation to these factors.
3. Give an account of the physical and physiological mechanisms that enable salt marsh and
mangrove species to survive in a saline habitat
4. Discuss the implications of seaweed morphology for photosynthesis, growth and survival:
how relevant is the form-function model by Littler?
5. How useful are marine algae as (direct or indirect) indicator species of water pollution?
Describe the characteristics required for a good indicator species.
6. Write an short essay to describe nutrient uptake by seaweeds. What is meant by the
physiological status of a seaweed/alga and what does it tell us?
7. Mass spawning is a reproductive strategy adopted by many but not all corals. Discuss the
advantages and disadvantages of this strategy and relate them to the evolution of acroporid
8. Zooxanthellae, symbionts of hermatypic corals, fix carbon dioxide during photosynthesis
but coral reefs are thought, nevertheless, to be sources of atmospheric carbon. Explain.
9. Shells and hard skeletons appeared about 600 million years ago. Discuss what the likely
factors were that prohibited their development before that time, but has allowed them
10. Compare and contrast the impacts of global warming in marine and terrestrial habitats.
Give detailed examples of evidence for the impacts of global warming in marine habitats.
11. What advantages and disadvantages do biological tags have over artificial tags in fish
12. What is the current status of cod stocks in the Irish Sea? Explain the annual status of this
resource over recent years according to the parameters in a sustainable yield model.