Figure 4.

Total understory vegetation cover by soil nitrogen indicator category in 10 m × 10 m plots on the Clatse and Neekas rivers, B.C. Species are separated into nitrogen-rich soil and nitrogen-poor soil indicator categories based on data by Klinka et al. [29].

Mathewson et al. BMC Ecology 2003 3:4   doi:10.1186/1472-6785-3-4
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