摘要
利用聚类分析和演替度分析方法,研究青海湖鸟岛地区湖水退缩形成的盐碱地植物群落类型及其演替过程.结果表明,青海湖鸟岛湖水退缩形成的盐碱地植被有四大主要群落类型为碱蓬单优群落,碱蓬+西伯利亚蓼群落,西伯利亚蓼+碱茅+碱蓬群落和碱茅+西伯利亚蓼+碱蓬群落;青海湖鸟岛盐碱地植被有两条演替线路,为盐碱沙地群落演替线路 碱蓬单优群落经碱蓬+西伯利亚蓼群落,向西伯利亚蓼+碱茅+碱蓬群落演替 和盐碱草地演替线路 碱蓬单一优势种群落,经碱蓬+西伯利亚蓼群落,向碱茅+西伯利亚蓼+碱蓬群落演替 ;随着植物群落的演替,物种多样性增加,均匀度提高,而丰富度在不同的演替线路表现不同的规律.
Based on hierarchical cluster analysis and succession value analysis,the present paper deals with community types and community vegetation succession of saline land in Bird Island of Qinghai Lake,caused by lake water level lowering.The results show that saline land vegetation comprises of Suaeda salsa community,Suaeda salsa+Polygonum sibiricum community,Polygonum sibiricum+Puccinellia spp.+Suaeda salsa community and Puccinellia spp.+Polygonum sibiricum+Suaeda salsa community.Saline land vegetation in Bird Island of Qinghai Lake have two succession routes:(1) saline sand is that Suaeda salsa community develops towards Polygonum sibiricum+Puccinellia spp.+Suaeda salsa community via Suaeda salsa+Polygonum sibiricum community;(2) saline meadow is that Suaeda salsa community develops towards Puccinellia spp.+Polygonum sibiricum+Suaeda salsa community via Suaeda salsa+Polygonum sibiricum community.Along the succession process,both species diversity of and species evenness of plant community increase,but species richness of plant community shows different trend in terms of succession process.
出处
《西北植物学报》
CAS
CSCD
2003年第4期550-553,共4页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家中西部基金资助项目 K99-05-1
关键词
青海湖鸟岛
盐碱地
植被演替
聚类分析
Bird Island of Qinghai Lake
saline land
vegetation succession
hierarchical cluster analysis
