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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58 mice per ha This correction factor is only approximate because home ranges
are not exactly elliptical, and there is some overlap among individuals, but the
adjusted density estimate is closer to the true value than is the biased estimate
Intercept line Figure 4.11 Schematic illustration of the line intercept method as
used for density estimation of shrubs and trees. The shaded areas represent the
canopy coverage of a shrub. The measurements l, are for cover estimates (
(5.13) Estimate the variance of D, the estimated population density, by - var(n) ,
var(1/ā) var(D) = oso + T(Tays | S.E. (D) = V/var(D) (5.14) 95% confidence interval
= D + (1.96)[S.E. (D)] One problem in these estimates for the variance of line ...