Palaeolimnology

Question 0

The skeletal remains of

Answer 0

Diatoms can be studied; the lake sediments contain a record of the diatoms that lived in the lake at different stages of the lakes history.

Question 1

Palaeolimnology is the

Answer 1

Study of lake sediments and the history of lakes.

Question 2

Diatoms are highly

Answer 2

Responsive to changes in water quality.

Question 3

The diatoms present in the different stages of the lakes history will therefore be a

Answer 3

Result of the type of water chemistry and can be used to determine the pH of the lake at the time of deposition.

Question 4

The pH history of a lake can be

Answer 4

Reconstructed from diatom remains preserved in lake sediments.

Question 5

Chemical techniques can be used to

Answer 5

Calculate the date at which each slice of sediment was deposited.

Question 6

Studies of lakes in areas of thin soils, where

Answer 6

Levels of acid deposition are high, have shows that they acidified in the last 150 years.

Question 7

Studies have also shown that afforestation by itself does

Answer 7

Not cause lake acidification, but may intensify acidification due to the increases scavenging of sulfur pollutants from the air.

Question 8

Palaeolimnology was used to settle some of the

Answer 8

Debates about the causes of surface water acidification.