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.

FigA1

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).


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