摘要
研究绿地群落动态特征是城市绿地科学营造与管理的重要基础,2016年在上海环城绿带建立1 hm^(2)动态监测样地,以样地木本植物为研究对象,探讨其群落结构、优势种群以及碳储量变化动态。结果表明:1)2021年样地内共记录木本植物26科41属46种,2021年与2016年物种组成发生部分变化,比2016年的种数增加1种;更新苗以落叶树种为主,占更新苗总数的60.24%。2)2021年样地乔木层植物共计1858株,隶属15科19属20种;原有植株减少216株,并新增64株。3)女贞重要值由32.15%增长至38.41%;香樟重要值由12.91%增长至23.56%;水杉重要值由10.96%减少至8.76%。4)种群密度整体呈降低趋势;样地植物间块状混交格局和个体空间分布的规则性仍然明显,群落物种组成趋于混交但不明显。5)群落整体胸径级呈单峰型,胸径级20 cm以上植物由2016年的4.65%增长至10.27%;冠幅增大植株占样地总植株数的72.93%。6)在样地优势种中,总生物量和总碳储量增长最多的为香樟、女贞和刺槐,分别增加14.429、12.125、6.4075 t/hm^(2)。通过长期固定样地动态监测城市绿地变化,研究植物群落生长发育规律以及对人为干扰的响应,有助于认识城市绿地群落形成机制,为城市绿地的科学管护和碳汇等生态功能评估提供科学依据。
The dynamic characteristics of green space community are the important bases of scientific construction and management of urban green space.Through the establishment of 1 hm^(2) dynamic monitoring plot in Shanghai Green Belt,taking the dynamic changes of woody plants in the plot as the research objects,this paper discussed the changes of community structure,ominant population and carbon stock.The results indicated that 1)there were 46 species of woody plants belonging to 41 genera and 26 families in the 2021,the species composition has changed partially between 2021 and 2016,with 1 species more than those in 2016.The regeneration seedlings were mainly deciduous trees,accounting for 60.24%of the total number of newer seedlings.2)In 2021,there were 1858 woody plants in the plot,belonging to 15 families,19 genera and 20 species,with 216 plants decreased and 64 plants increased.3)The importance value of Ligustrum lucidum increased from 32.15%to 38.41%,while the importance value of Cinnamomum camphora increased from 12.91%to 23.56%and Metasequoia glyptostroboides reduced from 10.96%to 8.76%.4)The population density decreased as a whole,the regularity of block mixing pattern and individual spatial distribution among plants in the plot was still obvious,and community species composition tended to be mixed but not obvious.5)The overall DBH class of the community presented a single peak,the number of plants above 20cm increased from 4.65%in 2016 to 10.27%and the number of plants with increased crown width accounted for 72.93%of the total plants in the plot.6)Among the dominant species,the total biomass and total carbon storage increased most were C.camphora,L.lucidum and Robinia pseudoacacia,with the values of 14.429 t/hm^(2),12.125 t/hm^(2) and 6.4075 t/hm^(2),respectively.Through the long-term dynamic monitoring of urban green space on permanent plots,the formation and maintenance mechanism of urban diversity are studied,which provides a scientific basis for the construction and maintenance of urban green space.
作者
刘雨沛
张庆费
王旭东
邓力豪
贾熙璇
姜迎
戴兴安
LIU Yupei;ZHANG Qingfei;WANG Xudong;DENG Lihao;JIA Xixuan;JIANG Ying;DAI Xingan(Shanghai Chenshan Botanical Garden,Shanghai 201602,China;Changsha Urban Development Group Co.Ltd,Changsha 410006,Hunan,China;North China University of Water Resources and Electric Power,Zhengzhou 450046,Henan,China;Chongqing Qijiang District Garden Landscaping Management Office,Chongqing 401420,China;Xinhe Real Estate Co.Ltd.of CSCEC,Changsha 410116,Hunan,China;College of Landscape Architecture,Central South University of Forestry&Technology,Changsha 410004,Hunan,China)
出处
《西北林学院学报》
北大核心
2025年第2期152-164,189,共14页
Journal of Northwest Forestry University
基金
国家重点研发项目(2022YFC3802602-2),上海市绿化和市容管理局辰山专项(编号G142418)。
关键词
城市绿地
群落结构
植物多样性
储碳量
urban green land
community structure
plant diversity
carbon storage
