摘要
通过对福州地区的台湾相思次生林林隙进行实地调查,运用Shannon-Wiener物种多样性指数、生态优势度指标以及边缘效应强度指数,对其边缘效应现象进行了深入分析。研究结果表明：用物种多样性指数测定的边缘效应强度值为1.016 9~1.182 8,而用生态优势度值测定的边缘效应强度值为0.684 4~1.289 6,均值分别为1.118 3和1.036 2,边缘效应均大于1,属于正效应;林隙边缘区由于边缘效应的存在,物种多样性和生态优势度均优于冠空隙和非林隙地区,这对于研究林隙的动态演替具有重要意义,也为沿海地区台湾相思人工林的经营管理及保护提供理论依据。
Through field investigation of Acacia confusa in outskirts of Fuzhou,edge effects were analyzed by using the Shannon-Wiener species diversity index,ecological dominance as well as the intensity index.Result shows that the edge effect intensity measured by species diversity index is 1.016 9-1.182 8;the edge effect intensity measured by value of ecological dominance is 0.684 4-1.289 6;the average value are 1.118 3 1.036 2 respectively;edge effect which are all more than 1 belong to positive effect.Due to the edge effect,the species diversity ecological dominance of the gap edge are optimal than that of canopy gaps non-gap region;it is significant for research gaps＇ dynamic succession;it provides the theory basis for management protection of Acacia confusa plantation in the coastal areas in Fujian.
出处
《防护林科技》
2011年第4期4-6,21,共4页
Protection Forest Science and Technology
基金
教育部博士点学科专项基金(20090315120008)
福建省科技攻关重点项目(2009N005)
