Chapter 4, Estimating Density: Quadrat Counts
Chapter 4 Estimating density : Quadrat Counts (Version 5, 27 January 2017) Page Quadrat SIZE AND SHAPE ........................................ .................................. 137 Wiegert's Method ........................................ ........................................ .141 Hendricks' Method ........................................ .......................................1 46 When Should You Ignore these Recommendations ? .....................148 STATISTICAL DISTRIBUTIONS ........................................ .............................. 149 Poisson Distribution ........................................ ...................................151 Negative Binomial Distribution ........................................ ...................160 LINE INTERCEPT METHOD.
Counts of plants or animals on areas of known size are among the oldest techniques in ecology. Counts are simple to comprehend and can be used in a great variety of ways on organisms as diverse as trees, shrubs, barnacles, kangaroos, and sea-birds. The basic requirements of all these techniques are only two: (1) that the area (or volume)
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