- 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...
- The evolution of contact calls in isolated and overlapping populations of two white-eye congeners in East Africa (Aves, Zosterops)Martin Husemann
Terrestrial Ecology Research Group, Department of Ecology and Ecosystem Management, Technische Universitat Munchen, Hans Carl von Carlowitz Platz 2, D 85354 Freising Weihenstephan, Germany
BMC Evol Biol 14:115. 2014....
- Small-scale spatial variability in phylogenetic community structure during early plant succession depends on soil propertiesWerner Ulrich
Chair of Ecology and Biogeography, Nicolaus Copernicus University in Torun, Lwowska 1, 87 100, Torun, Poland
Oecologia 175:985-95. 2014..We conclude that theories on phylogenetic community composition need to incorporate effects of small-scale variability of environmental factors...
- 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%...