In 1950 the pH of the pond water was 8.2, but by 2000 the pH had decreased to 5.2. Which of the following changes would also be expected in the pond over the same time period? a. Increased levels of dissolved oxygen

1. Increased levels of dissolved oxygen

2. Increased levels of heavy metals

3. Increased number of fish species

a. 1 only

b. 2 only

c. 3 only

d. 2 and 3

e. 1, 2, and 3

Question

Kathryn Irwin

Geography

2 April, 23:04

In 1950 the pH of the pond water was 8.2, but by 2000 the pH had decreased to 5.2. Which of the following changes would also be expected in the pond over the same time period? a. Increased levels of dissolved oxygen

1. Increased levels of dissolved oxygen

2. Increased levels of heavy metals

3. Increased number of fish species

a. 1 only

b. 2 only

c. 3 only

d. 2 and 3

e. 1, 2, and 3

+1

Answers (1)

Know the Answer?

Jasiah Travis · Answer 1

b. 2 only (Increased levels of heavy metals)

Explanation:

When the pH of the pond water becomes acidic, it can cause toxic heavy metals to be released into the water. Hence, the level of dissolved oxygen reduces drastically making it unconducive for the survival of fishes.