| 兰州市南北两山不同生境红砂种群数量动态研究 |
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| 引用本文： | 周资行,李毅,焦健.兰州市南北两山不同生境红砂种群数量动态研究[J].自然资源学报,2011,26(10):1726-1737. |
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| 作者姓名： | 周资行 李毅 焦健 |
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| 作者单位： | 甘肃农业大学 林学院,兰州 730070 |
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| 基金项目： | 国家科技部(农转资金)(2009GB2G100375); 农业科技成果转化资金计划甘肃省科技厅项目(0805XCNA063) |
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| 摘 要： | 对兰州市南北两山不同生境天然分布的红砂种群进行数量动态研究,通过径级结构回归年龄结构,编制静态生命表,绘制生存函数曲线,计算动态指数及谱分析,结果表明:不同生境红砂种群均表现为幼龄个体多,中老龄个体少,种群在Ⅲ龄级时死亡率最高,随着年龄增加,死亡率有所降低,Ⅶ、Ⅷ龄级由于生理衰老死亡率上升,种群存活曲线均接近于Deevey-Ⅲ型,年龄结构均接近增长型,增长潜力阴坡山下(5.90%)>阳坡山下(5.62%)>阴坡山上(4.77%)>阳坡山上(3.79%),并存在明显的周期性,红砂种群的数量动态变化整体上受其生命周期中生物学特性的控制;由于坡向及海拔差异带来的环境异质性,阴坡山下红砂种群整体生长最佳,阴坡山上和阳坡山下次之,而阳坡山上的红砂种群危险系数最大,受环境和种内压力共同作用显著,应适当抚育,从而促进种群持续发育。
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| 关 键 词： | 红砂 生境 种群数量动态 静态生命表 动态指数 谱分析 兰州市南北两山 |
| 收稿时间： | 2011-03-10 |
| 修稿时间： | 2011-06-05 |
Quantity Dynamics of Reaumuria soongorica Populations from Different Habitats in the South-north Hills in Lanzhou |
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| ZHOU Zi-hang,LI Yi,JIAO Jian.Quantity Dynamics of Reaumuria soongorica Populations from Different Habitats in the South-north Hills in Lanzhou[J].Journal of Natural Resources,2011,26(10):1726-1737. |
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| Authors: | ZHOU Zi-hang LI Yi JIAO Jian |
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| Institution: | College of Forestry, Gansu Agricultural University, Lanzhou 730070, China |
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| Abstract: | The quantity dynamics of the natural Reaumuria soongorica populations from different habitats in the south-north hills in Lanzhou were studied.Using the age class structure regression by diameter class,the static life table and survival function curves were determined,the dynamic indexes were calculated and spectrum analysis was done.The results showed: in 4 habitats the Reaumuria soongorica populations all contained more young members and less middle-aged or old members;all populations had highest death ra... |
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| Keywords: | Reaumuria soongorica habitats population quantity dynamics static life table dynamic index spectral analysis the south-north hills in Lanzhou |
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