You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Use of Plant-to-Neighbour Distances for the Detection of Competition
E. C. Pielou
Journal of Ecology
Vol. 50, No. 2 (Jul., 1962), pp. 357-367
Published by: British Ecological Society
Stable URL: http://www.jstor.org/stable/2257448
Page Count: 11
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
1. In an aggregated plant population, the pattern within high density patches may be regular owing to competition. Tests for pattern, applied to the whole population, will usually indicate only the overall aggregation, and will not reveal the localized regularity. 2. Evidence as to whether or not competition is taking place may be obtained by collecting a sample of the short plant-to-nearest-neighbour distances only. Such a truncated sample of distances may be compared with a truncated theoretical distribution. 3. Certain simplifying assumptions as to the form of the distribution of these distances may be made. It is then possible to estimate the minimum distance which must separate any pair of plants if both are to attain a definite size. 4. The test for interplant competition was applied to five natural populations of forest trees. Three gave clear evidence that competition was occurring, and for these the minimum interplant distances were estimated.
Journal of Ecology © 1962 British Ecological Society