Ryan A. Sponseller and Stuart G. Fisher. 2008. The influence of drainage networks on patterns of soil respiration in a desert catchment. Ecology 89:1089–1100.

Appendix D. A figure showing monthly soil respiration data for sites 1–4.

FIG. D1. Soil respiration (g C·m2·d-1) from beneath P. velutina (P) and from paired interplant (IP) spaces at sites 1–4. Values are the mean (± SE, n = 5 each date). Asterisks refer to significant differences between plant and interplant plots following paired t tests (* P < 0.05, ** P < 0.01, and *** P < 0.001). Note difference in ordinal scale for sites 1 and 2 vs. sites 3 and 4.