浙江农业学报

• 环境科学 • 上一篇    下一篇

呼伦湖退水湖岸植被的分类排序与多样性分析

  

  1. (1 潍坊工程职业学院 应用化学与生物工程学院, 山东 青州 262500; 2 中央民族大学 生命与环境科学学院,北京 100081;3 内蒙古达赉湖国家级自然保护区管理局,内蒙古 海拉尔 021008;4 青州市中医院,山东 青州 262500)
  • 出版日期:2015-12-25 发布日期:2016-01-05

Quantitative classification, ordination and brief analysis of vegetation communities in retreat area of Hulun Lake

  1. (1 Institute of Applied Chemistry and Biological Engineering, Weifang Engineering Vocational College, Qingzhou 262500, China; 2 College of Life and Environment Science, Minzu University of China, Beijing 100081, China; 3 Administrative Bureau of the Dalai Lake National Nature Reserve, Hailaer 021008, China; 4 Traditional Chinese Medical Hospital of Qingzhou City, Qingzhou 262500, China)
  • Online:2015-12-25 Published:2016-01-05

摘要: 1998—2012年,呼伦湖经历了连续15年的退水,在南岸形成了一个5 km×3 km的矩形退水湖岸。于2012年8月中旬对退水湖岸的植被进行调查,并利用空间代替时间的方法探讨15年来样地植被演替的序列。通过双向指示种法(TWINSPAN),在5级分类水平上将所调查的70个样方分为6组,利用去趋势对应分析(DCA)对样方排序,得到植被的演替序列为:藜科先锋群落(演替前期)→芦苇群落(演替中期)→羊草群落(演替后期)。比较各演替阶段物种多样性及组成发现:演替后期物种丰富度、均匀度和多样性明显高于演替前期和中期;物种均匀性则表现为演替中期明显低于演替前期及后期;随演替进展,多年生植物在群落中比例逐渐增加。

关键词: 空间代替时间, TWINSPAN, DCA, 植被演替, 呼伦湖

Abstract: Hulun lake, the largest inland lake in Inner Mongolia, had suffered a 15\|year lake retreat from 1998 to 2012. The lake retreat had formed a 5 km×3 km rectangle shape wetland. The vegetation of the rectangle shape wetland was investigated in mid\|August, 2012. With the help of spatial sequence instead of time successional sequence method, the succession sequence of the sample spot was revealed. After two\|way indicator species analysis (TWINSPAN), 70 sample plots had been divided into 6 groups in Division 5 level. Detrended correspondence analysis(DCA) was also adopted and the successional sequence was revealed as Chenopodiaceae pioneer community (first stage)→ Phragmites australis community (second stage)→ Leymus chinensis community (final stage). After comparing each succession stages biodiversity index (Patrick, Simpson, Shannon\|wiener and Pielou indice) and growth style, it was shown that: (1) The final stage of the succession had the highest biodiversity, evenness and richness; (2) The evenness of the vegetation dropped down a little from the first stage to the second stage, and recovered in the final stage; (3) The proportion of the perennial plant steadily increased from stage one to final stage .

Key words: spatial sequence instead of time successional sequence, TWINSPAN, DCA;vegetation succession, Hulun Lake