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A Plotless Method of Sampling Vegetation
G. A. Yarranton
Journal of Ecology
Vol. 54, No. 1 (Mar., 1966), pp. 229-237
Published by: British Ecological Society
Stable URL: http://www.jstor.org/stable/2257669
Page Count: 9
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A sampling method is required to provide data for the quantitative description of variation in vegetation and its relationship to the environment. A method of sampling species contact is described which operates at the scale of the individual. Point samples are taken in which two touching species are recorded; the points can be distributed randomly or in sampling grids, and environmental data may be collected either at points or from grids. The data provided can be used to calculate χ2 interspecific association values and two correlation coefficients, one based on the joint occurrence of a pair of species, and the other on the occurrences of the pair with all the other species. These quantities may be employed as the data for more sophisticated analyses. The use of the method is illustrated by reference to saxicolous bryophyte vegetation.
Journal of Ecology © 1966 British Ecological Society