天目山自然保护区银杏天然种群生命表

被引:40
作者
李玲 [1 ]
张光富 [1 ]
王锐 [1 ]
孙国 [1 ]
赵明水 [2 ]
机构
[1] 南京师范大学生命科学学院江苏省生物多样性与生物技术重点实验室
[2] 浙江天目山国家级自然保护区管理局
关键词
种群生命表; 存活曲线; 种群数量动态; 银杏;
D O I
10.13292/j.1000-4890.2011.0005
中图分类号
Q948 [植物生态学和植物地理学];
学科分类号
071012 ; 0713 ;
摘要
以种群生命表和生存分析理论为基础,采用空间代替时间法和分段匀滑技术,编制浙江天目山自然保护区银杏天然种群特定时间生命表,绘制其死亡率曲线、消失率曲线、存活曲线和生存函数曲线,分析种群数量动态变化。结果表明:银杏种群结构存在波动性,趋于DeeveyⅡ型,其成年阶段的个体较丰富;银杏种群死亡率和消失率曲线变化趋势基本一致,均出现2个高峰,均在第Ⅵ龄级和第Ⅺ龄级阶段出现第一和第二峰值;银杏种群的生存率单调下降,累计死亡率单调上升,生存率下降趋势前期高于后期,累计死亡率则相反;由生存函数曲线看出,天目山银杏种群具有前期薄弱、中期稳定和后期衰退的特点。
引用
收藏
页码:53 / 58
页数:6
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