凋落物输入变化和氮添加对半干旱草原群落生产力及功能群组成的影响

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嘎玛达尔基¹^,², 杨泽¹^,², 谭星儒¹^,², 王珊珊¹^,², 李伟晶¹^,², 游翠海¹^,², 王彦兵¹^,², 张兵伟¹^,³, 任婷婷¹^,², 陈世苹¹^,²^,^*(

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Effect of altered litter input and nitrogen addition on ecosystem aboveground primary productivity and plant functional group composition in a semiarid grassland

GAMADAERJI ¹^,², YANG Ze¹^,², TAN Xing-Ru¹^,², WANG Shan-Shan¹^,², LI Wei-Jing¹^,², YOU Cui-Hai¹^,², WANG Yan-Bing¹^,², ZHANG Bing-Wei¹^,³, REN Ting-Ting¹^,², CHEN Shi-Ping¹^,²^,^*(

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图8. 凋落物输入变化和氮添加通过土壤环境影响群落功能群组成及地上净初级生产力(ANPP)的结构方程模型。AIC, 赤池信息量; BIC, 贝叶斯信息量; Fisher’s Chi, 费舍尔精确检验值。

Fig. 8. Structural equation model (SEM) on how litter manipulation and nitrogen addition affect the community functional group composition and aboveground net primary productivity (ANPP) through soil environment. CV_SWC, variance of soil water content; DOM, soil dissolved organic matter (the first principal component of DOC and DON, which explained 0.88 of them); PB, perennial bunch grasses; PF, perennial forbs; PR, perennial rhizome grasses; SWC, soil water content; Ts, soil temperature. AIC, Akaike Information Criterion; BIC, Bayesian Information Criterion; Fisher’s Chi, result of Fisher exact test.