Threats to marine ecosystems MCQs

By: Prof. Dr. Fazal Rehman | Last updated: June 11, 2025

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1. : Which of the following is a major threat to marine biodiversity caused by human activities?



2. : What is a significant impact of plastic pollution on marine life?



3. : How does climate change primarily affect marine ecosystems?



4. : Which of the following practices contributes to habitat destruction in marine environments?



5. : What is the primary cause of ocean acidification?



6. : Which threat is caused by the introduction of non-native species into marine ecosystems?



7. : How does overfishing impact marine populations?



8. : What is a consequence of sea level rise on coastal marine habitats?



9. : Which of the following is a direct effect of oil spills on marine life?



10. : What impact does light pollution have on marine ecosystems?



11. : Which practice threatens the health of coral reefs?



12. : What is a significant threat to mangroves?



13. : Which of the following contributes to the formation of ocean dead zones?



14. : What is the impact of invasive marine species on local ecosystems?



15. : Which environmental change is primarily associated with the loss of polar ice caps?



16. : How does noise pollution affect marine animals?



17. : What is a primary consequence of coastal land reclamation?



18. : Which of the following threats is associated with the discharge of untreated sewage into oceans?



19. : What is a major impact of shipping and maritime traffic on marine environments?



20. : How does coastal aquaculture affect marine ecosystems?



21. : What is a primary threat posed by the introduction of pharmaceuticals into marine environments?



22. : Which human activity is linked to the destruction of sea grass beds?



23. : What impact does thermal pollution from power plants have on marine environments?



24. : Which of the following is a consequence of the expansion of human settlements along coastlines?



25. : What effect does increased sedimentation have on coral reefs?



26. : How does the extraction of marine resources impact the environment?



27. : What is a major consequence of excessive nutrient input from agricultural runoff?



28. : Which practice is linked to the decline of shark populations in marine ecosystems?



29. : How does the loss of biodiversity affect marine ecosystems?



30. : What is the primary source of marine pollution from land-based activities?



 

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