Biology Topic Practice

Systematic Sampling with Transects

Transects are used to investigate how the distribution of organisms changes across an area.

What is a "belt transect"?

What is Systematic Sampling with Transects?

"Transect sampling is a systematic ecological method used to measure how the distribution of species changes across an environmental gradient."

Question 1

Why are quadrats used in ecological fieldwork?

Question 2

Why should random sampling be used when placing quadrats?

Question 3

Which sampling method is best for investigating how the distribution of plants changes across a path?

Measuring Distribution

Lay out a tape measure (the transect line) across the area.

Place quadrats at regular intervals along the line (e.g., every 2 metres).

Record the species present and abiotic factors (like light or soil pH) at each point.

Exam Tip

Transects are perfect for looking at a change from a shaded area to a sunny area.

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