摘要
采用样方法,调查研究了珠海淇澳二斜湾5 a的无瓣海桑人工林林缘或林窗的自然繁殖的无瓣海桑幼苗的种群特征,为了解无瓣海桑自然种群的生态适应性或潜在的生态危害提供参考.结果显示,二斜湾的无瓣海桑幼苗种群总个体数为299株,平均密度7.475株·m-2;其中当年生植株比例占72.24%,上年生植株占27.76%;基径和株高结构显示种群呈增长种群模式,基径和株高呈现极显著的线性相关关系,无瓣海桑幼苗种群为集群分布型.由于受人工林遮蔽光线等的限制和滩涂生长地的竞争,其它自然分布的红树植物如秋茄等,甚至外来入侵的互花米草均受其影响,提示无瓣海桑对其他植物的生长存在生态危害,建议对已种植林分进行乡土红树植物的改造,未种植海滩不再种植无瓣海桑.
The population characteristics of naturally regenerated Sonneratia apetala under the edges and gaps of the five-year man-made S. apetala forest at the Erxiewan of Qi＇ao, Zhuhai was surveyed by using the quadrat method, so as to provide basic data for investigating the ecological adaptability and potential damage of natural population of S. apetala. The results showed that the seedling population of S. apetala at Er＇xiewan has a total of 299 individuals, with average density of 7.475 individuals · m-2 The current-year seedling accounted for 72.24% , while the last-year seedling took up 27.76% of the whole population. The size structure of base di- ameter and plant height showed an increasing population type, and there was a significant linear relationship be- tween base diameter and plant height. The population has a clump distribution type. The growth of native man- grove species such as Kandelia obovata, even the invasive plant species Spartina alterniflora were affected by this plantation trees through competing light and habitat, suggesting the Sonneratia apetala has an ecological damage to the other mangrove species. The structure of this plantation forest of S. apetala should be changed with native mangrove species and the S. apetala should not be planted anymore for the bare beaches.
出处
《广州大学学报（自然科学版）》
CAS
2015年第1期50-55,共6页
Journal of Guangzhou University:Natural Science Edition
基金
国家自然科学基金资助项目(31270526)
关键词
无瓣海桑
自然更新幼苗
种群
特征
珠海淇澳岛
Sonneratia apetala
naturally regenerated seedling
population
characteristics
Qi＇ao island
