刈割、施肥对高寒草甸物种多样性与生态系统功能关系的影响及群落稳定性机制

王海东, 张璐璐, 朱志红

Effects of clipping and fertilizing on the relationships between species diversity and ecosystem functioning and mechanisms of community stability in alpine meadow

WANG Hai-Dong, ZHANG Lu-Lu, ZHU Zhi-Hong

表3 物种多样性与群落地上净初级生产力关系的回归分析

Table 3 Regression analysis for the relationship between species diversity and aboveground net primary productivity of community

物种类型 Species type 施肥梯度 Fertility gradient 刈割梯度 Clipping gradient 不施肥 Unfertilized 施肥 Fertilized 不刈割 Unclipped 中度刈割 Stubbled 3 cm 重度刈割 Stubbled 1 cm K F R2 K F R2 K F R2 K F R2 K F R2 全部物种 Total species 2.90 2.7 0.05 -0.84 1.4 0.03 -0.71 0.7 0.02 -1.00 0.1 0 2.41 0.8 0.02 响应物种 Response species 1.31 1.4 0.03 -1.13 5.5* 0.10 -1.58 10.3** 0.23 -0.16 0 0 0.80 0.2 0.01 作用物种 Effect species 0.03 0 0 -0.28 0.8 0.02 -0.86 5.1* 0.13 0.02 0 0 -0.54 0.7 0.02 共有物种 Common species 2.84 2.6 0.05 -0.81 1.3 0.02 -0.68 0.6 0.02 -0.55 0 0 2.62 0.9 0.03 样方数 No. of quadrat 54 54 36 36 36