Analysing Ecological Change

Question 1

Give an example of how fossil records can be used to identify changes in abiotic and biotic factors.

Answer 1

fossilised pollen demonstrates type of vegetation found in an area at certain time in history

chemical composition of shells embedded in sediments provides information about temperature when shells were made

Question 2

What are some causes of significant ecological change?

Answer 2

land clearing, increased carbon emissions, release of introduced species/pests, spread of disease, over-use of land and fishing resources, pesticide control, urban microclimates, building of dams