Water Pollution Flashcards
1
Q
Examples of freshwater pollution sources:
A
Agricultural run off, sewage, industrial discharge, solid domestic waste.
2
Q
Examples of marine pollution sources:
A
Rivers, pipelines, atmosphere and human activities at sea.
3
Q
What is biochemical oxygen demand?
A
A measure of the amount of dissolved oxygen required to break down the organic material in a given volume of water through aerobic biological activity by microorganisms.
4
Q
What is an indicator species?
A
Plants and animals that show something about the environment by their presence, absence, abundance or scarcity.
5
Q
What is a biotic index?
A
It indirectly measures pollution by assaying the impact on species within the community according to their tolerance, diversity and relative abundance.
