Ecological Archives E096-040-A1
Lenka Kuglerová, Roland Jansson, Ryan A. Sponseller, Hjalmar Laudon, and Birgitta Malm-Renöfält. 2015. Local and regional processes determine plant species richness in a river-network metacommunity. Ecology 96:381–391. http://dx.doi.org/10.1890/14-0552.1
Appendix A. Tests for riparian habitat breadth.
Table A1. Relationship between dispersion of Ellenberg indicator values (light, moisture, pH, and nitrogen) and stream size (catchment area – km²). Dispersion of moisture, pH, and nitrogen significantly increased (values in bold) with increasing stream size.
Ellenberg dispersion values |
||||
Variable |
r2 |
P |
slope |
(Smallest/largest values for 1st - 7th order streams |
Light |
0.04 |
0.17 |
0.03 |
3.5 – 3.9 |
Moisture |
0.51 |
<0.001 |
0.12 |
1.4 – 5.0 |
pH |
0.29 |
<0.001 |
0.13 |
2.3 – 6 |
N |
0.35 |
<0.001 |
0.13 |
1.4 – 5 |
Note: Ordinary least square regression (OLR) models were used to detect statistical trends between individual variables and stream size. r², P and slope estimates are results of individual OLRs.
Fig. A1. Relationship between within-site dissimilarity and stream size. Within-site dissimilarity was calculated as the average of all pairwise community dissimilarities (Jaccard's) in small plots (80 × 20 cm) at each site. The positive trend was found to be significant (r² = 0.33, P < 0.001, df = 38).