Number of individuals of 21 species of land snails caught in the vegetation in Norway, 1927.
data(okland)A unnamed vector of 21 integers.
This is one of the data sets that Isao Motomura used to demonstrate his ‘law of geometric series’ of the abundance of species in a sample of a biological community. The abundance values and fitted series are in figure 2 of Motomura (1932).
Motomura, I. 1932. On the statistical treatment of communities (in Japanese). Zool. Mag. (Tokyo) 44: 379--383. English translation in Appendix I in Doi, H. and Mori, T. 2012. The discovery of species-abundance distribution in an ecological community. Oikos 122: 179--182.
Okland, F. 1930. Quantitative Untersuchungen der Landschneckenfauna Norwegens. I. Zoomorphology 16: 748--804.