Ecological Archives C006-077-A1
Jiangxiao Qiu and Monica G. Turner. 2015. Importance of landscape heterogeneity in sustaining hydrologic ecosystem services in an agricultural watershed. Ecosphere 6:229. http://dx.doi.org/10.1890/es15-00312.1
Appendix A. Model selection statistics for landscape pattern effects on three hydrologic services at the subwatershed scale.
Table A1. Model selection statistics for i=8 best models (∆AICc ≤ 2.0) predicting landscape composition and configuration effects on freshwater supply service at the subwatershed level.
Model ranks |
Landscape composition |
Landscape configuration |
AICc |
∆AICc |
wi |
1 |
%urban + %wetland + %grassland |
+ urban ED + wetland ED |
426.18 |
0.00 |
0.20 |
2 |
%urban + %wetland + %grassland |
+ urban ED + wetland ED + urban COHESION |
426.95 |
0.77 |
0.14 |
3 |
%urban + %wetland + %grassland |
+ urban ED |
426.97 |
0.79 |
0.14 |
4 |
%urban + %wetland |
+ urban ED + wetland ED |
427.05 |
0.87 |
0.13 |
5 |
%urban + %wetland + %grassland |
+ urban ED + wetland ED + grassland PD |
427.38 |
1.20 |
0.11 |
6 |
%urban + %wetland + %grassland |
+ urban ED + grassland PD |
427.66 |
1.48 |
0.10 |
7 |
%urban + %wetland + %grassland |
+ urban ED + urban COHESION |
427.70 |
1.52 |
0.10 |
8 |
%urban + %wetland + %grassland |
+ urban ED + urban COHESION + wetland ED + grassland PD |
428.14 |
1.96 |
0.08 |
Note: abbreviations for landscape metrics are, ED for edge density; COHESION for patch cohesion, and PD for patch density. Model weight (wi) denotes strength of evidence for alternative models.
Table A2. Model selection statistics for i=5 best models (∆AICc ≤ 2.0) predicting landscape composition and configuration effects for groundwater quality at the subwatershed level.
Model ranks |
Landscape composition |
Landscape configuration |
AICc |
∆AICc |
wi |
1 |
%cropland + %grassland |
|
-93.79 |
0.00 |
0.24 |
2 |
%cropland + %grassland |
+ grassland COHESION |
-92.31 |
1.48 |
0.12 |
3 |
%cropland + %grassland |
+ cropland ED |
-92.11 |
1.68 |
0.11 |
4 |
%cropland + %grassland |
+ grassland PD |
-91.99 |
1.80 |
0.10 |
5 |
%cropland + %grassland |
+ cropland COHESION |
-91.80 |
1.99 |
0.09 |
Note: abbreviations for landscape variables are, ED for edge density; COHESION for patch cohesion, and PD for patch density. Model weight (wi) denotes strength of evidence for alternative models.
Table A3. Model selection statistics for i=7 best models (∆AICc ≤ 2.0) predicting landscape composition and configuration effects for surface-water quality at the subwatershed level.
Model ranks |
Landscape composition |
Landscpae configuration |
AICc |
∆AICc |
wi |
1 |
%forest + %grassland + %wetland + %cropland |
+ grassland PD + wetland PD + forest PLADJ + contagion |
-184.99 |
0.00 |
0.12 |
2 |
%forest + %grassland + %wetland + %cropland |
+ grassland PD + cropland ED + wetland PD + forest PLADJ + contagion |
-184.81 |
0.17 |
0.11 |
3 |
%forest + %grassland + %wetland + %cropland |
+ cropland COHESION + grassland PD + wetland PD + forest PLADJ + contagion |
-184.09 |
0.90 |
0.08 |
4 |
%forest + %grassland + %wetland + %cropland |
+ cropland ED + forest PD + grassland PD + wetland PD + forest PLADJ + contagion |
-183.83 |
1.16 |
0.07 |
5 |
%forest + %grassland + %wetland + %cropland |
+ forest PD + grassland PD + wetland PD + forest PLADJ + contagion |
-183.62 |
1.37 |
0.06 |
6 |
%forest + %grassland + %wetland + %cropland |
+ cropland COHESION + cropland ED + grassland PD + wetland PD + forest PLADJ + contagion |
-183.58 |
1.41 |
0.06 |
7 |
%forest + %grassland + %wetland + %cropland |
+ grassland PD + wetland PD + forest PLADJ |
-183.50 |
1.49 |
0.06 |
Note: abbreviations for landscape variabels are, ED for edge density; COHESION for patch cohesion, PD for patch density, and PLADJ for proportion of like adjacencies. Model weight (wi) denotes strength of evidence for alternative models.