Random sampling using quadrats When counting the number of a single species in a habitat, if the proportion of the habitat you have sampled is known, the total number of that species in that ...

The design falls into the classical sampling framework in that the sample selection probabilities are independent of the underlying variable (s) of interest. We illustrate that estimators generated by ...

Zahl (1977, Ecology 58, 907-913) introduced the jackknife estimation of species diversity. Under certain conditions, Pielou's pooled-quadrat estimator is shown to be equivalent to Zahl's jackknife ...

1. Learn the sampling methods Past paper trend: Sampling methods using quadrats can be either random or systematic. Exam tip: Revise these two different methods that both use quadrats.