高寒草甸退化过程中群落生产力和物种多样性的非线性响应机制研究

陈宁,张扬建,朱军涛,李军祥,刘瑶杰,俎佳星,丛楠,黄珂,王荔

Nonlinear responses of productivity and diversity of alpine meadow communities to degradation

Ning CHEN,Yang-Jian ZHANG,Jun-Tao ZHU,Jun-Xiang LI,Yao-Jie LIU,Jia-Xing ZU,Nan CONG,Ke HUANG,Li WANG

表1 不同退化阶段高寒草甸的土壤理化特征

Table 1 The soil physicochemical properties of alpine meadow in different degradation stages

草甸类型 Meadow type	土壤容重 Soil bulk density (g?cm^-3)	砾石质量比 Mass ratio of gravel (%)	砾石体积比 Volume ratio of gravel (%)	土壤氮含量 Soil nitrogen content (%)	土壤碳含量 Soil carbon content (%)
对照 Non-degraded	1.23 ± 0.04^a	29.77 ± 7.96^a	16.80 ± 7.45^a	0.45 ± 0.06^a	5.29 ± 0.95^a
轻度退化 Mild degraded	1.26 ± 0.04^a	36.51 ± 1.34^a	22.19 ± 4.00^a	0.50 ± 0.04^a	5.76 ± 0.59^a
中度退化 Moderate degraded	1.50 ± 0.02^b	37.43 ± 6.04^a	28.24 ± 2.60^ab	0.44 ± 0.11^a	5.10 ± 1.30^a
重度退化 Severe degraded	1.47 ± 0.02^b	47.60 ± 4.52^b	32.15 ± 2.41^b	0.32 ± 0.05^b	3.21 ± 0.69^b
极度退化 Serious degraded	1.56 ± 0.11^b	49.62 ± 4.94^b	33.52 ± 0.68^b	0.34 ± 0.02^b	3.57 ± 0.23^b