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• 研究报告 • 上一篇    下一篇

海南特有种东方琼楠种群结构特征

杨怀1,李意德1**,许涵1,陈仁利1,骆土寿1,陈德祥1,缪宁2,盛大勇3   

  1. (1中国林业科学研究院热带林业研究所, 广州 510520; 2四川大学生命科学学院生物资源与生态环境教育部重点实验室, 成都 610064; 3惠州市林业科学研究所, 广东惠州 516001)
  • 出版日期:2013-06-10 发布日期:2013-06-10

Population structure  of endemic species Beilschmiedia tungfangensis  in Hainan of South China.

YANG Huai1, LI Yi-de1**, XU Han1, CHEN Ren-li1, LUO Tu-shou1, CHEN De-xiang1, MIAO Ning2, SHENG Da-yong3   

  1. (1Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China; 2Key Laboratory of Bioresource and Ecoenvironment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China; 3Huizhou Institute of Forestry Science, Huizhou 516001, Guangdong, China)
  • Online:2013-06-10 Published:2013-06-10

摘要: 为探讨海南特有种东方琼楠(Beilschmiedia tungfangensis)种群结构特征,在海南尖峰岭林区设置20.4 hm2样地,从种群径级结构、静态生命表、存活曲线、空间分布格局等方面进行分析。结果表明:1)东方琼楠种群径级分布呈倒“J”型,为增长型种群;2)在第Ⅲ级(DBH: 10~15 cm)时生命期望值最高,向大龄级和小龄级呈递减趋势;3)存活曲线接近DeeveyⅢ型,呈凹型;死亡率曲线和消失率曲线呈“V”型;4)不同分析方法均表明该种群呈聚集分布,且聚群强度较大;5)聚块性指数随径级呈“正余弦”变化。

关键词: 生态风险, 时空变化, 空间自相关, 景观格局, 地统计学特征

Abstract: To approach the characteristics of endemic species Beilschmiedia tungfangensis population structure in Hainan, a 20.4hm2 experimental site was installed in Jianfengling forest region of Hainan, with the population diameter structure, static life table, survival curve, and spatial distribution pattern analyzed. The diameter class distribution of the B. tungfangensis population showed a reverse “J” type, suggesting that this population was of increasing type. The life expectancy was the highest at the third stage (DBH: 10-15 cm), and showed a decreasing trend to both the big and the small age classes. The survival curve was a concave one, similar to Deevey type III, whereas the mortality rate curve and hazard rate curve showed “V” type. The analyses with different methods all showed that the spatial distribution pattern of the B. tungfangensis population tended to be aggregated, and the aggregation intensity was strong. The patchiness index showed “sine or cosine” curve with diameter class.

Key words: geostatistical feature,