长期封育演替下典型草原植物群落生产力与多样性关系
张义1,2, 程杰3, 苏纪帅4, 程积民1,2,5,*(
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Diversity-productivity relationship of plant communities in typical grassland during the long- term grazing exclusion succession
ZHANG Yi1,2, CHENG Jie3, SU Ji-Shuai4, CHENG Ji-Min1,2,5,*()
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图4. 封育草地群落地上生产力影响因子的随机森林模型(A)和方差分解(B)结果。*, p < 0.05; **, p < 0.01。
Fig. 4. Results of random forest model (A) and variance partition analysis (B) for factors influencing aboveground net primary productivity of grassland communities after grazing exclusion. *, p < 0.05; **, p < 0.0l. D, Simpson dominance index; E, Pielou evenness index; FDis, functional dispersion; FEve, functional evenness; FRic, functional richness; H′, Shannon-Wiener index; LCC, leaf carbon concentration; LDMC, leaf dry matter content; LNC, leaf nitrogen concentration; LPC, leaf phosphorus concentration; LT, leaf thickness; SLA, specific leaf area.
