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城市森林中火炬树的更新特性
李茗蕊1, 莫训强2, 崔爽1, 李萍1
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
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。
关键词:  城市森林  火炬树  更新苗  空间格局  生物入侵
DOI:10.13961/j.cnki.stbctb.2018.05.018
分类号:Q14
基金项目: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)
Regeneration Characteristics of Rhus Typhina in Urban Forest
LI Mingrui1, MO Xunqiang2, CUI Shuang1, LI Ping1
1.School of Environmental and Biological Engineering, Liaoning Shihua University, Fushun, Liaoning, 113001, China;2.School of Geographic and Environmental Sciences, Tianjin Normal University, Tianjin 300387, China
Abstract:
[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] ① The annual density of regeneration seedlings fluctuated between 3~8 plants/m2, 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. ② The regeneration seedlings at the low level of diameter and height accounted for the vast majority of the total. ③ The 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.
Key words:  urban forest  Rhus typhina  regeneration  spatial pattern  invasion