RESPONSE OF RADIAL GROWTH TO NEIGHBORING COMPETITION AND CLIMATE FACTORS IN TAXUS CUSPIDATA

doi:10.3773/j.issn.1005-264x.2009.06.018

Abstract

Abstract:

Aims Our objective was to address the impacts of sex, tree size, neighboring competition and climate factors on radial growth in Taxus cuspidata.

Methods An integrative dendroclimatic approach was used to quantify radial growth and relate its response to climate factors.

Important findings Sex and tree size exhibited significant effects on radial growth in Taxus cuspidata. Radial growth rate was significantly larger in males than in females (p=0.023) and was negatively related to neighboring competition in both sexes. Female trees were affected more negatively by neighboring competition than males (p<0.05). Dendroclimatic analysis indicated different responses to climate factors for males and females. Radial growth in females was negatively related to mean temperature in August and October of the previous year, but no significant associations to mean temperature were found in males. Radial growth in females was associated negatively with precipitation in the current January, and that of males was associated negatively with precipitation in the current August.

Key words: radial growth, dioecy, neighboring competition, dendroclimatology

ZHANG Chun-Yu, GAO Lu-Shuang, ZHAO Ya-Zhou, JIA Yu-Zhen, LI Jin-Xin, ZHAO Xiu-Hai. RESPONSE OF RADIAL GROWTH TO NEIGHBORING COMPETITION AND CLIMATE FACTORS IN TAXUS CUSPIDATA[J]. Chin J Plant Ecol, 2009, 33(6): 1177-1183.

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URL: https://www.plant-ecology.com/EN/10.3773/j.issn.1005-264x.2009.06.018

https://www.plant-ecology.com/EN/Y2009/V33/I6/1177

Figures/Tables 8

References 22

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变差来源 Variance source	自由度 df	平方和 Sum Sq	均方 Mean Sq	F	p
个体大小 Individual size	1	0.306	0.306	11.233	0.001
性别 Sex	1	0.147	0.147	5.371	0.023
交互作用 Interactions	1	0.002	0.002	0.065	0.799
残差 Residuals	94	2.564	0.027

变差来源 Variance source	自由度 df	平方和 Sum Sq	均方 Mean Sq	F	p
个体大小 Individual size	1	0.306	0.306	11.233	0.001
性别 Sex	1	0.147	0.147	5.371	0.023
交互作用 Interactions	1	0.002	0.002	0.065	0.799
残差 Residuals	94	2.564	0.027

年表统计量 Chronology statistics	雄性 Male		雌性 Female
年表统计量 Chronology statistics	标准年表 Standardized	差值年表 Residual	标准年表 Standardized	差值年表 Residual
样芯数 No. of cores	31	31	30	30
平均敏感度 Mean sensitivity	0.156 5	0.138 8	0.144 0	0.136 6
标准差 Standard deviation	0.146 1	0.108 9	0.147 4	0.108 9
斜度 Skewness	-1.159 5	-0.220 6	1.281 5	-0.063 5
峰度 Kurtosis	5.866 8	0.371 8	9.553 9	0.203 8
一阶自相关系数 First order autocorrelation	0.400 2	0.029 9	0.263 5	0.059 5

年表统计量 Chronology statistics	雄性 Male		雌性 Female
年表统计量 Chronology statistics	标准年表 Standardized	差值年表 Residual	标准年表 Standardized	差值年表 Residual
样芯数 No. of cores	31	31	30	30
平均敏感度 Mean sensitivity	0.156 5	0.138 8	0.144 0	0.136 6
标准差 Standard deviation	0.146 1	0.108 9	0.147 4	0.108 9
斜度 Skewness	-1.159 5	-0.220 6	1.281 5	-0.063 5
峰度 Kurtosis	5.866 8	0.371 8	9.553 9	0.203 8
一阶自相关系数 First order autocorrelation	0.400 2	0.029 9	0.263 5	0.059 5

公共区间统计量 Common interval statistics	雄性 Male (1865~2007)	雌性 Female (1859~2007)
样芯间平均相关性 Mean correlations among all cores	0.158	0.203
信噪比 Signal-to-noise ratio (SNR)	5.500	5.103
样本总体代表性 Expected population signal (EPS)	0.858	0.876
第一主成分解释方差量 Variance in first eigenvector (%)	20.24	27.64
年表公共区间均值 Chronology common interval mean	0.989	0.986
年表公共区间标准差值 Chronology common interval SD	0.093	0.117