Ch 8.3 Negative impact on reclamation

Question 1

What is the first negative impact of reclamation?

Answer 1

Death of marine creatures due to the increased level of toxins and heavy metals.

Question 2

What is the second negative impact of reclamation?

Answer 2

Health risk to humans.

Question 3

How the first negative impact occurs?

Answer 3

When contaminated mud on the top layer is being dredged or dumped, the toxicity of the seawater increases. The toxic materials may accumulate in the body of sea creatures.

Question 4

How the second negative impact occurs?

Answer 4

Toxins and heavy metals may be passed on the food chain and consumed by humans.

Question 5

What is the third negative impact of reclamation?

Answer 5

Reduce ability of sea creatures to find food.

Question 6

What is the fourth negative impact of reclamation?

Answer 6

Suffocation of fish

Question 7

What is the fifth negative impact of reclamation?

Answer 7

Destruction of marine habitats.

Question 8

How the third negative impact occurs?

Answer 8

Dredging increases the level of sediment particles. This increases the turbidity of the sea water and reduces the visibility of the sea water. Sunlight cannot reach to the seabed and hinder photosynthesis, this affect the ability of marine animals plants to produce food.

Question 9

How the fourth negative impact occurs?

Answer 9

Suspended sediment may clog the gills of fish.

Question 10

How the fifth negative impact occurs?

Answer 10

Dredging destroys shelters for many sea creatures.