荆州古城墙入侵构树种群的分布格局和生命表分析  

Analysis of Spatial Distribution Pattern and Static Life Table of B. papyrifera Population in Ancient City Wall of Jingzhou

作　　者：李胜蓝 周璟[1] 陈中义[1,2] LI Sheng-lan;ZHOU Jing;CHEN Zhong-yi(College of Horticulture and Gardening,Yangtze University,Jingzhou,Hubei 434025,China;of Plant Ecology and Environmental Remediation,Yangtze University,Jingzhou,Hubei 434025,China)

机构地区：[1]长江大学园艺园林学院,湖北荆州434025 [2]长江大学植物生态与环境修复研究所,湖北荆州434025

出　　处：《生物灾害科学》2018年第2期108-112,共5页Biological Disaster Science

摘　　要：荆州古城墙是我国重点保护历史文物,近年来,构树在荆州古城墙入侵,对古城墙植被和古城墙保护造成了影响。为了解构树种群的基本特征,在荆州古城墙上选择大小为22 m×22 m的样地一个,对样地上的野生构树种群进行了调查统计。结果表明:构树种群存活曲线呈Deevey-Ⅲ型,构树幼苗库量大,但幼苗死亡率高;构树种群的年龄结构呈非典型的金字塔型分布,构树种群是增长型种群;6种聚集强度参数计算表明,构树种群的分布格局为聚集分布,且聚集强度较高,这与样地坡度较大、构树果实被鸟传播等因素有关。构树种群良好的更新机制是其成功入侵荆州古城墙的重要原因之一。The ancient city wall of Jingzhou is one of the State Key Historical and Cultural Relics Protection Units in China. But in recent years, Broussonetia papyrifera had invaded successfully in the ancient city wall of Jingzhou, and caused significant impacts on the ancient city wall vegetation and protection. In order to understand the basic characteristics of B. papyrifera population, we set the size of the sample to 22 m × 22 m in the ancient city wall of Jingzhou, and finished the survey and statistics of the B. papyrifera population structure. The results showed that the B. papyrifera population survival curve was Deevey-Ⅲ type, with a large quantity of B. papyrifera seedling base in the community, but with a high seedling mortality. The population of B. papyrifera was in a stable condition with atypical pyramid-type diameter structure, showing B. papyrifera may be a growing population in the ancient city wall of Jingzhou. Calculated six aggregation intensity indexes showed that the distribution pattern of B. papyrifera population was a kind of high strength aggregated distribution, which was relevant to the steep plot and the fruit spread by birds. To sum up, good update mechanism of B. papyrifera population was one of the important reasons for its successful invasion into the ancient city wall in Jingzhou.

关 键 词：构树 分布格局 静态生命表 荆州古城墙 

分 类 号：S792.99[农业科学—林木遗传育种]