Figure 2.

Effects of grazing on dissolved organic C (DOC, mg kg⁻¹), dissolved organic N (DON, mg kg⁻¹), the ratio of DOC and DON (DOC/DON ratio), nitrate N (NO₃ ⁻-N, mg kg⁻¹), ammonium N (NH₄ ⁺-N, mg kg⁻¹), soil available N (SAN, mg kg⁻¹), the ratio of NH₄ ⁺-N and NO₃ ⁻-N (NH₄ ⁺-N/NO₃ ⁻-N ratio), and belowground root biomass (BGB, kg m⁻²) in an alpine meadow at three elevations (i.e., 4313 m, 4513 m, and 4693 m) on the Tibetan Plateau. Error bars represent standard error (n = 4). MBC and SOC data were obtained from Fu et al. [22].