摘要
本文对晒网坝自然植被各生态学指标进行主成分分析和聚类分析,找出适应三峡水库消落区环境的优势物种。结果表明,6项调查指标可综合成2个主成分因子,它们包含了总方差为77.66%原始数据的信息。通过聚类分析和6项生态学指标把13种物种划分为3类,第一类:狗牙根;第二类:丁香蓼、水蓼、牛筋草、鳢肠、鬼针草、牛毛毡、露珠珍珠菜、萱草、香附子、泽泻;第三类:稗、李氏禾。三个类别之间存在较大差异,综合评价得出,稗和李氏禾为晒网坝消落区的优势物种,建议作为三峡水库消落区植被重建首选物种。
The ecological indices of the natural vegetation at Shaiwangba of the Three Gorges Reservoir area were analyzed by principal component analysis and cluster analysis, in order to find out outstanding species adaptable to hydro-fluctuation belt of mudflat. The results showed that two of the 6 indicators used for the analysis can be selected as the principal components, and contributed 77.66% variance of the total. Data contributions from Cluster analysis showed that 13 species can be divided into three categories based on the 6 ecological indicator~ The first is Cynodondactylon. The second includes Ludwigia prostrata Roxb, Polygonum hydropiper, Eleusine indica L. Gaertn, Eclipta prostrata, Lysimachia clethroides Duby, Bidens pilosa, Eleocharis yokoscensis parvula Hemerocallisfulva L Cyperus rotundus, and Alisma plantago-aquatica L. The third consists of barnyard and Leersiahexandra Swartz. There were large differences between the three categories. The comprehensive evaluation showed that Echinohila crusgalli and Leersiahexandra Swartz were the outstanding species in Shaiwangba, which could be suggested as preferred species for vegetation reconstruction in the hydro-fluctuation belt.
作者
高芳
秦洪文
刘正学
李新
张立冬
姚姗姗
李冰锐
杨容
张兴民
苏丁一
GAO Fang QIN Hongwen LIU Zhengxue LI Xin ZHANG Lidong YAO Shanshan LI Bingrui YANG Rong ZHANG Xingmin SU Dingyi(School of Environment and Chemistry Engineering, Chongqing Three Gorges University, Chongqing 404100 Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Chongqing 404100 Department of Life Science and Engineering, Chongqing Three Gorges University, Chongqing 404100, China)
出处
《三峡生态环境监测》
2017年第1期52-57,共6页
Ecology and Environmental Monitoring of Three Gorges
基金
国家自然科学基金面上项目(31270451)
重庆市水利局项目(渝水资源〔2014〕10号)
三峡库区水环境演变与污染防治重点实验室开放基金(WETKL2012MS-07)
重庆市研究生科研创新项目(CYS15224)
重庆三峡学院青年项目(15QN08)
重庆市教委科学技术研究项目(KJ1601021)
关键词
晒网坝
自然植被
消落区
优势物种
主成分分析
聚类分析
Shaiwangba
natural vegetation
hydro-fluctuation belt
outstanding species
principal component analysis
cluster analysis
