功能多样性比物种多样性更好解释氮添加对高寒草地生物量的影响

董六文, 任正炜, 张蕊, 谢晨笛, 周小龙

Functional diversity rather than species diversity can explain community biomass variation following short-term nitrogen addition in an alpine grassland

DONG Liu-Wen, REN Zheng-Wei, ZHANG Rui, XIE Chen-Di, ZHOU Xiao-Long

表1 天山高寒草地氮添加2年后群落内常见物种相对多度变化(平均值±标准误)

Table 1 Relative abundance of common species after two years nitrogen addition in Tianshan alpine grassland (mean ± SE)

种名 Species PFG RAC RAN 冰草 Agropyron cristatum G 15.28 ± 0.05 31.64 ± 0.01 草地早熟禾 Poa pratensis G 13.51 ± 0.02 17.30 ± 0.03 苔草 Koeleria cristata G 15.77 ± 0.02 2.02 ± 0.01 细果薹草 Carex stenocarpa G 0.54 ± 0.01 0.01 羊茅 Festuca ovina G 0.20 32.35 ± 0.01 紫花针茅 Stipa purpurea G 7.45 ± 0.01 6.28 ± 0.02 二裂委陵菜 Potentilla bifurca F 5.15 ± 0.01 3.27 ± 0.01 莓叶委陵菜 Potentilla fragarioides F 4.23 ± 0.01 0.98 多裂委陵菜 Potentilla multifida F 0.05 0.01 天山蒲公英 Taraxacum tianschanicum F 0.04 ± 0.01 0.21 ± 0.01 防风 Saposhnikovia divaricata F 0.48 ± 0.01 0.25 ± 0.01 斜茎黄耆 Astragalus adsurgens L 29.05 ± 0.02 4.72 ± 0.01 小花棘豆 Oxytropis glabra L 7.77 ± 0.02 0.46