Different transect methods

Different transect methods

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Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: MODEL RELEASED. Different transect methods. Students carrying out a survey of the plants in a grassy area by combining two different transect methods. The quadrat transect (square grid) is being used at intervals along a line transect (straight line). The student at left is counting the number of plants in a particular grid location, and the student at right is recording the results. The use of such transects, together with probability theory, allows entire populations of plants in a field to be estimated from a survey of a few small areas.

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