Fig Wasps

Lichens as Bio-indicatorsLichens are alga and fungi living symbiotically

(they have to live together to survive)

The alga make sugars by photosynthesis

and gives some to the fungus

The fungus delivers water and

minerals to the alga

Check your answers

These are called

Crusty

These are calledFlakey

These are calledLeafy

These are called

Shrubby

Indicator species – Invertebrate as indicator of water pollution

Rat tailed maggotLive in sewage polluted water

FlatwormLive in slightly polluted water

Fresh water shrimpLive only in fresh water

You can determine if the water is polluted by collecting a sample of suspected water and analysis the type of animals that are in the sample.