小叶锦鸡儿灌丛化对典型草原群落结构与生态系统功能的影响
丁威1,王玉冰2,3,向官海2,3,迟永刚4,鲁顺保1,*(
),郑淑霞2,*()
),郑淑霞2,*()
Effects of Caragana microphylla encroachment on community structure and ecosystem function of a typical steppe
DING Wei1,WANG Yu-Bing2,3,XIANG Guan-Hai2,3,CHI Yong-Gang4,LU Shun-Bao1,*(),ZHENG Shu-Xia2,*()
),ZHENG Shu-Xia2,*()
图6. 灌丛化对草原生态功能包括地上净初级生产力(ANPP)、植被和土壤养分(C、N)库影响的直接与间接途径。箭头正负数值为标准化回归系数, 表示正、负效应; r2值表示某一变量被其他变量的方差解释量。
Fig. 6. Structural equation model (SEM) analyses of direct and indirect effects of shrub encroachment on grassland ecosystem function, including aboveground net primary productivity (ANPP), vegetation and soil nutrient pools (C and N). Values associated with solid arrows are standardized path coefficients, indicating positive or negative effects. r2 values associated with response variables indicate the proportion of variation explained by relationships with other variables.
