摘要
用T square距离方法 ,通过空间格局的T形指数C及其检验值Z1,对九顶山西坡红桦种群中选取的 3块样地 6条样线进行了研究 .结果表明 ,该区红桦种群空间分布格局以随机型分布为主 ,如样地支部牛场、十二河等 ,少数地区由于遭到人类的严重干扰和破坏 ,形成了集聚型分布格局 ,如样地上堰 .通过分布距离指数I的进一步对照分析得出 ,在样线L4中 ,在主要的随机格局中也有少部分表现出了集聚型 .本区红桦树种按其年龄段的不同分为 3个年龄级 :幼树、成年树、老年树 .红桦幼树比较缺乏 ,仅占红桦树种的 12 % ,而老年树种占 2 4 % ,年龄结构为衰老型 .在九顶山西坡 ,红桦种群已开始老化 ,幼树又相当缺乏 ,使红桦种群的自我更新面临极大威胁 ,建议加强对红桦林的保护和种群自我更新能力的研究 .
The T-square study of Betula albo-sinensis population on the west slope of Jiuding Mountain showed that the population was mainly in random distribution, and in aggregated distribution in a few lines because of the negative human activities and severe destructions. In this region, the old trees of Betula albo-sinensis population were accounted for about 24%, and the younger trees only accounted for 12%. There exited a huge difficulty in the self-regeneration of Betula albo-sinensis population. Therefore, some measures should be taken to protect the population and to speed up its self-regeneration.
出处
《应用生态学报》
CAS
CSCD
2004年第1期1-4,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金资助项目 (3 9770 13 4)
关键词
九顶山
红桦种群
空间格局
距离方法
Jiuding Mountain, Betula albo-sinensis population, Spatial pattern, T-square.
