图2. 大兴安岭泥炭地植物叶片C、N、P含量(A、B、C)及其计量值(D、E、F)。黑色的短横线分别为每个植物种C、N、P指标的平均值。深灰、灰色和浅灰的箱子分别为草本、落叶灌木和常绿灌木植物, 箱子高度为25%-75%数值分布, 箱子中的横线为平均值, 箱须为标准偏差, 箱须上方不同的大写字母和下方不同的小写字母分别表示生活型之间和生活型内部物种之间的差异显著(p < 0.05)。Bf, 柴桦; Cc, 地桂; Cg, 玉簪薹草; Da, 小叶章; Ev, 白毛羊胡子草; Lp, 杜香; Rc, 头花杜鹃; Sm, 越桔柳; Sr, 细叶沼柳; Vu, 笃斯越桔; Vv, 越桔。

Fig. 2. Leaf C, N, and P concentrations (A, B, C) and their stoichiometric ratios (D, E, F) in peatland plants of the Da Hinggan Ling. The black and short horizontal lines are the average values for leaf C, N, and P variables for each species. Boxes in dark grey, grey, and light grey mark graminoids, deciduous shrub, and evergreen shrub plants, respectively. The box encompasses the 25th to 75th percentiles; lines in boxes mark the mean values, and whiskers are the standard deviation value. Different capital letters above boxes and lowercase letters below boxes mark significant differences among growth forms and species (p < 0.05). Bf, Betula fruticosa; Cc, Chamaedaphne calyculata; Cg, Carex globularis; Da, Deyeuxia angustifolia; Ev, Eriophorum vaginatum; Lp, Ledum palustre; Rc, Rhododendron capitatum; Sm, Salix myrtilloides; Sr, Salix rosmarinifolia; Vu, Vaccinium uliginosum; Vv, Vaccinium vitis-idaea.