Figure 2

Mass remaining of the litter of mixed roots from dominant species on the Qinghai-Tibet Plateau in different treatments and the effects of N addition and precipitation change. C, control; N, nitrogen addition; PR, precipitation reduction; PI, precipitation increase. All data were expressed as % of original litter mass. Bars show mean ± SE (n = 8). See Table S3 for the full model with all the main effects and their interactions.