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Estimating Species Richness Using the Jackknife Procedure
James F. Heltshe and Nancy E. Forrester
Vol. 39, No. 1 (Mar., 1983), pp. 1-11
Published by: International Biometric Society
Stable URL: http://www.jstor.org/stable/2530802
Page Count: 11
You can always find the topics here!Topics: Species, Population estimates, Estimation bias, Sampling bias, Sample size, Estimators, Confidence interval, Species populations, Statistical estimation, Biometrics
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An exact expression is given for the jackknife estimate of the number of species in a community and for the variance of this number when quadrat sampling procedures are used. The jackknife estimate is a function of the number of species that occur in one and only one quadrat. The variance of the number of species can be constructed, as can approximate two-sided confidence intervals. The behavior of the jackknife estimate, as affected by quadrat size, sample size and sampling area, is investigated by simulation.
Biometrics © 1983 International Biometric Society