城市森林中火炬树的更新特性  

Regeneration Characteristics of Rhus Typhinain Urban Forest

作　　者：李茗蕊 莫训强 崔爽[1] 李萍[1] LI Mingrui;MO Xunqiang;CUI Shuang;LI Ping(School of Environmental and Biological Engineering,Liaoning Shihua University,Fushun,Liaoning,113001,China;School of Geographic and Environmental Sciences,Tianjin Normal University,Tianjin 300387,China)

机构地区：[1]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001 [2]天津师范大学地理与环境科学学院,天津300387

出　　处：《水土保持通报》2018年第5期109-114,121,共7页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目"微生物驱动土壤BHMTPMPA-Cd螯合物的地球化学过程及分子机制研究"(41773093);辽宁省科学事业公益研究基金"有机膦酸修复Cd污染土壤及其环境风险研究"(2015003017)

摘　　要：[目的]对天津市城市森林中火炬树的更新苗特性进行调查,为生物入侵后的生态恢复提供依据。[方法]对天津市城市森林中火炬树的更新特性进行年际调查,并与已有的火炬树天然更新研究数据进行对比,经5种聚集强度指数的表征,探究城市森林中火炬树更新苗的数量特征、径级结构和空间格局的年际变化等。[结果](1)火炬树更新苗全年密度在3~8株/m2之间波动,1年生幼苗个体数占绝大多数,龄级结构呈现典型金字塔型,种群属于增长型,更新能力旺盛;(2)处于低地径级和低高度级的火炬树更新苗占总体的绝大多数;(3)火炬树更新苗呈现典型的聚集分布。[结论]城市森林内火炬树更新能力旺盛,入侵性仍然显著,需采取有效措施进行监测与防治。[Objective]To survey the regeneration characteristics of Rhus typhina in urban forest in Tianjin City,in order to provide basis for ecological invasion and restoration of urban forest.[Methods]The regeneration characteristics of R.typhina in urban forests in Tianjin City were investigated,and compared with the existing natural regeneration data.Based on the characterization of five aggregative intensity indices,the quantitative characteristics,inter-annual variation of diameter structure and spatial pattern of regeneration seedlings of R.typhina in urban forest were studied.[Results]①The annual density of regeneration seedlings fluctuated between 3~8 plants/m 2,the one year old seedlings were majority,and the age structure showed a typical pyramid type.The population belonged to the growth type,and the regeneration ability was strong.②The regeneration seedlings at the low level of diameter and height accounted for the vast majority of the total.③The regeneration seedlings of R.typhina showed a typical aggregation distribution.[Conclusion]The regeneration ability of R.typhina in urban forests is strong,and the invasion is still significant.It is necessary to take effective measures to monitor and control it.

关 键 词：城市森林 火炬树 更新苗 空间格局 生物入侵 

分 类 号：Q14[生物学—生态学]