南亚热带常绿阔叶林树木多样性与生物量和生产力的关联及其影响因素

朱杰, 吴安驰, 邹顺, 熊鑫, 刘世忠, 褚国伟, 张倩媚, 刘菊秀, 唐旭利, 闫俊华, 张德强, 周国逸

Relationships between tree diversity and biomass/productivity and their influence factors in a lower subtropical evergreen broad-leaved forest

Jie Zhu, Anchi Wu, Shun Zou, Xin Xiong, Shizhong Liu, Guowei Chu, Qianmei Zhang, Juxiu Liu, Xuli Tang, Junhua Yan, Deqiang Zhang, Guoyi Zhou

表2 物种多样性、结构多样性、地形和土壤养分主成分的特征值和贡献率

Table 2 Eigenvalues and contribution rate of species diversity factors, structural diversity factors, topography factors and soil nutrients factors.

类型 Class	成分 Component	特征值 Eigenvalue	方差贡献率 Contribution rate of variance (%)	方差累积贡献率 Cumulative contribution rate of variance (%)
物种多样性 Species diversity	1	2.93	73.45	73.45
	2	1.02	25.52	98.97
	3	0.03	0.76	99.73
	4	0.01	0.27	100
结构多样性 Structural diversity	1	4.22	70.37	70.37
	2	0.93	15.54	85.91
	3	0.47	7.78	93.69
	4	0.25	4.19	97.88
	5	0.07	1.11	98.99
	6	0.06	1.01	100
地形 Topography	1	2.77	55.35	55.35
地形 Topography	2	1.49	29.77	85.12
	3	0.61	12.13	97.25
	4	0.13	2.66	99.91
	5	0.00	0.09	100
土壤养分 Soil nutrients	1	3.51	50.17	50.17
土壤养分 Soil nutrients	2	1.37	19.62	69.79
	3	0.84	11.98	81.77
	4	0.65	9.22	90.99
	5	0.42	6.05	97.04
	6	0.13	1.89	98.93
	7	0.07	1.07	100