珍稀濒危物种银缕梅种群结构特征研究——以安徽省金寨县为例

Study on the Population Structure Characteristics of the Rare and Endangered Species Parrotia subaequalis——Taking Jinzhai County in Anhui Province as an Example

通过对安徽省金寨县银缕梅栖息地和资源现状的调查,从空间分布、种群结构特征、年龄特征、空间结构等方面对银缕梅种群特征进行分析。结果表明:银缕梅主要分布在海拔400～700m的低山,均为聚集型空间分布;银缕梅种群多为伴生种,仅个别种群可在局部区域为优势种;银缕梅Ⅱ龄级和Ⅲ龄级幼树数居多,主要以种子繁殖为主,但分蘖萌生也是银缕梅的重要繁殖方式;银缕梅种群死亡率,都有出现负值的现象,说明种群波动性较大,有迅速发展或衰落的情况存在。因此,金寨县范围内急需开展有针对性的银缕梅保护工作,并进一步加强银缕梅的人工繁育和濒危机制研究。

In this study,through the investigation of the population and resource situation of Parrotia subaequalis at the habitat in Jinzhai,Anhui Province,the characteristics of the population were analyzed from the spatial distribution,the population structure,age and the spatial structure and so on. First,the results show that the Parrotia subaequalis is clustered distributed on the low mountains with the elevation of 400- 700m.Second,most of the population are auxiliary species,and only some individual population can be the dominant species in local areas.Third,most are young trees in Ⅱ and Ⅲ age-classes,and they are mainly seed propagation,but the tiller initiation is also the important breeding way of Parrotia subaequalis .Forth,there is a negative phenomenon in the mortality of the population of Parrotia subaequalis ,and that means there are rapid development or decline in the population due to high volatility.Therefore,it is urgent to take protection measures for Parrotia subaequalis in Jinzhai,and the artificial breeding and endangered mechanism research of Parrotia subaequalis should be propsed.