文献类型：期刊文献

中文题名：不同地理区域栓皮栎种群结构及其空间格局

英文题名：Population structure and spatial pattern of Quercus variabilis among different geographical areas,China

作者：高文强[1] 倪妍妍[1] 刘建锋[1] 王小菲[1] 薛泽敏[1] 江泽平[1] 何关顺[2]

机构：[1]中国林业科学研究院林业研究所/国家林业局林木培育重点实验室;[2]广西田林县林业种苗站

年份：2017

卷号：28

期号：2

起止页码：375-381

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；PubMed;

基金：国家自然科学基金项目(41371075)资助~~

语种：中文

中文关键词：栓皮栎;种群结构;空间格局;地理梯度

外文关键词：Quercus variabilis; population structure; spatial pattern; geographical gradient

分类号：S792.180.2

摘要：利用径级法和方差/均值法对我国不同地理区域上栓皮栎种群年龄结构及其空间分布格局进行分析.结果表明:在水平梯度上,中部、北部、南部和西部栓皮栎种群均呈倒J型分布,而东部种群呈衰退型分布.成年树在中部和南部均呈集群分布,而北部区域呈现随机分布;幼树在在北、中和西部区域均为集群分布,而在南部和东部均呈随机分布.在纬向梯度上,幼树聚集强度的纬向趋势为中>北>南,而成年树聚集强度为中>南>北,经向梯度上幼树和成年树的聚集强度均为中>西>东.在垂直梯度上,中、低海拔种群呈倒J型分布,高海拔呈现衰退型.幼树在不同海拔均呈集群分布;成年树在低海拔为随机分布,而在高海拔和中海拔均为集群分布.幼树和成年树的聚集强度均为中海拔>高海拔和低海拔.在不同地理区域上,幼树的聚集强度均高于成年树.因此,栓皮栋种群结构及其分布格局主要是由环境梯度变化及其自身生物学特性决定,证实了"中心-边缘"种群假说.
Age structures and spatial distribution patterns of Quercus variabilis populations were analyzed across geographical gradients （latitude, longitude and altitude） by using the size-grading method and the ratio of variance to mean. The results showed as following ： Over the horizontal gra- dient, the northern, middle, southern and western populations of Q. variabilis exhibited an inverse- J shape, but the eastern populations declined. The spatial patterns of adult individuals were all clumped except the northern populations which were randomly distributed. Juveniles were clumped in the northern, middle and western populations, but were randomly distributed in the southern and eastern populations. The aggregation intensity of juveniles across latitude decreased with the order as the central, northern and southern populations, but as the central, southern and northern populations for adult individuals, The aggregation intensity of both juveniles and adults across longitude fol- lowed a decreased order as the central, western and eastern populations. Along the altitudinal gradient, the inverse-J type occurred only in the low- and middle-altitude populations, but populations in the high altitude declined. The juveniles in populations among altitude gradient all were clumped, but the adults were all clumped except the low-altitude populations which were randomly distributed. The aggregation intensities of both juveniles and adults were higher in the middle than the other ahitudinal populations. Compared with adults, juveniles generally had higher aggregation intensities across various geographical gradients. Our results revealed that the age structure and spatial distribution pattern of Q. variabilis were mainly determined by environment variation across geographical gradients and the species＇ biological property, which supported the central-marginal hypothesis.