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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In most cases a clumped distribution occurs, and unless we take account of this
fact, we cannot census very accurately. We can sample the census zone in one of
two basic ways: simple random sampling or stratified random sampling.
Transects Boundary of census zone Quadrats (b) Blocks Kes (c) Figure 4.12
Three possible types of sampling frames in aerial census. (a) Unequal-length
transects across a census zone, laid at right angles to the baseline AB. (b) Equal-
We are concerned here with the first approach, estimating density. We discuss
the investigation of spatial pattern in the next chapter. The general procedure in
plotless sampling is illustrated in Figure 5.5. The census zone is the area of