Beetle occurrence data from (Ulrich and Zalewski 2006).
Occurrence data for 71 species from 17 sites. Columns are sites, rows are species. 1's are presences and 0's are absences.
A data frame with 71 observations on the following 17 variables.
Ulrich W, Zalewski M (2006). Abundance and Co-occurrence Patterns of Core and Satellite Species of Ground Beetles on Small Lake Islands. Oikos, 114, 338-348.
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