- Null model analysis of species associations using abundance dataWerner Ulrich
Department of Animal Ecology, Nicolaus Copernicus University, Gagarina 9, 87 100 Torun, Poland
Ecology 91:3384-97. 2010..These results suggest that abundance matrices, analyzed with an appropriate null model, may be a powerful tool for quantifying patterns of species segregation and aggregation...
- Null model analysis of species nestedness patternsWerner Ulrich
Nicolaus Copernicus University in Torun, Department of Animal Ecology, Gagarina 9, 87 100 Torun, Poland
Ecology 88:1824-31. 2007..Although previous studies have revealed a high frequency of nestedness, a reanalysis of 288 empirical matrices suggests that the true frequency of nested matrices is between 10% and 40%...