巢湖东部水源区湖滨带植物群落结构及植被修复策略研究

LAKESHORE VEGETATION IN DRINKING WATER SOURCE AREA OF EASTERN CHAOHU LAKE:COMMUNITY STRUCTURE AND RESTORATION STRATEGY

采用样带法研究了巢湖东部水源区湖滨带植物群落的分布规律,从而探索受损湖滨带植被的修复途径。研究表明:巢湖东部水源区湖滨带共有植物47种,隶属于23科、40属。TWINSPAN分类把45个样方划分为12个群丛,结合各样方实际水面以上高程,将其归并为5个群落类型。DCA排序结果表明水分和土壤基质类型是决定湖滨带植物群落分布的主导因子。结合巢湖多年水文数据分析了湖滨带优势物种与水文的关系,并建议竹叶眼子菜作为沉水植物恢复的先锋物种,荇菜作为浮叶植物恢复的先锋物种,苔草、芦苇等植物作为近岸区域恢复的主要物种。

The Chaohu Lake is one of the five largest lakes in China,and the lakeshore ecological restoration project will be conducted in drinking water source area of Eastern Chaohu Lake.Therefore,analyzing the composition of existing vegetation will provide scientific basis for lakeshore management and restoration.By the method of transect sampling,the distribution regularity of plant communities was studied.The results showed that the total species number of this area was 47,belonging to 23 families and 40 genera.TWINSPAN classification divided the vegetation into 5 communities.DCA ordination indicated humidity and soil type were the main factors influencing the community structure and distribution of lakeshore vegetation.The relationships between hydrology and dominant species were also analyzed.The results showed that Potamogeton wrightii could be regarded as pioneer species of submerged plants,Nymphoides peltatum as pioneer species of floating plants,and Phragmites australis,Carex argyi and Typha laxmannii were suitable in inshore area.