Sampling. Abiotic Factors (non-living) Biotic Factors (living) Disease Predators Food Light Intensity Temperature Pollution Moisture.

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Sampling techniques and the measurement of abiotic and biotic factors

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Presentation transcript:

Sampling

Abiotic Factors (non-living) Biotic Factors (living) Disease Predators Food Light Intensity Temperature Pollution Moisture

How could we sample… Abiotic factors such as light intensity and moisture? Plants in an area? Insects on the ground?

How could we catch our own living things to identify? Living things on the ground? Living things which fly? Living things on trees? Living things in streams? Living things in rockpools? Living things in ponds? Living things which come out at night? Think about plants and animals

Tree Beating

Kick Netting

Pond Dipping

Rock Pooling

Moth Trapping

Pitfall Traps

Quadrat

Abiotic FactorMeasurementErrorSolution Light IntensityLight meter Shading the meter Make sure your shadow doesn’t land on the meter MoistureMoisture meter Excess moisture on probe Wipe probe between readings Sources of Error

Organism Sampling technique ErrorSolution Plants Quadrat Unreliable results Throw quadrat randomly. Ground dwelling insects Pitfall Trap Unreliable results Cover trap with rock to stop birds eating sample.

How can you find out what lives in an area? 081gf1 04hfqp