Benjamin/Cummings, 1999 - Science - 620 pages
This coherent text translates the methods of statisticians into "ecological English" so that students may readily apply these methods to the real world. Ecological Methodology, Second Edition provides a balance of material on animal and plant populations. It teaches students of ecology how to design the most efficient tests in order to obtain maximum precision with minimal work. The first part of the text focuses on biological and technical issues in statistical methodology. Students learn about advances that have been made in designing better sampling devices, along with the techniques and equipment used for sampling. The second part deals with creating solid statistical design, and presents all methods that are well-known to statisticians in a language and context that students will easily understand.
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niche measure. But if the ecologist does not recognize resource states that
organisms do, there is a potential for misleading ... 13.2 NICHE BREADTH Some
plants and animals are more specialized than others, and measures of niche
where var(B') = Variance of Hurlbert's measure of niche breadth (B') p) =
Proportion of individuals found in or using resource state j (2 p., - 1.0) a) =
Proportion resource j is of the total resources (2 a, = 1.0) Y = Total number of
The ShannonWiener function is used less frequently than Levins's measure for
niche breadth. Hurlbert (1978) argues against the use of the Shannon-Wiener
measure because it has no simple ecological interpretation; he prefers Levins's ...