Fieldwork techniques (AQA GCSE Biology Combined Science): Flashcards

Square frame with known area for sampling

Avoids bias in population estimates

Plants and very slow-moving animals

Sum all values $\div$ number of quadrats

Most frequent value in dataset

Middle value when data in order

Straight line across study area

At regular intervals along line

Total area $\div$ quadrat area

Mean $\times$ scaling factor