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Investigating Populations and Abiotic Factors

Abiotic Factor Measurement technique
Solar Energy Input Using a light metre/sensor
Climate Rainfall and temperature can be
obtained from published records.
Thermometers and rain gauges can be
used. An electronic hygrometer can
measure humidity.

Topography Topographical surveys measure the
shape of the land. Surveyors levelling…

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Soil texture Soil texture charts show if the soil is
mainly clay, silt or sand.
After choosing an area to sample you need to choose random samples to avoid bias. Repeating the process will also improve reliability.

FRAME QUADRATS: these square frames are placed on the ground at random points…

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