摘要
国内外许多资料表明,水生维管束植物(以下简称水生植物)在发展渔业、农业、畜牧业和保护水域环境方面都具有一定的意义。水生植物是湖泊中的初级生产者,它在淡水生态系统中具有极其重要的作用。地处武汉市的东湖,是一个富营养型的浅水湖泊,湖中丛生着各种生态类型的水生植物,其群落结构在长江中下游浅水湖泊中具有一定的代表性。
Lake Donghu,a shallow lake covering an area of 28.5 km^(2),is situated in Wuhan city,Hubei Province.Investigation of the structure of macrophyte communities in the lake were carried out during 1962-1964,while the observations on the community dynamics were undertaken in the period of 1972-1978.In light of some of the methods adopted in the study of terrestrial plant communities,the basal characteristics of macrophyte communities in the lake were described and analyzed.These characteristics have been:the dominant species composition,community classification,distribution of associations,zonation,stratification,frequency,biomass,coverage and periodicity,etc.The greatest change of community structure in most part of the lake was the destruction of Potamogeton maackianus.In the sixties Potamogeton maackianus ranked first among the dominant species in the lake,yet it was completely destroyed in the seventies mainly because of over-stocking of grass carp.Nevertheless,when most of the stocked grass carp had been harvested.Najas major,Myriophyllum spicatum and Val-lisneria spiralis recovered fairly,but Potamogeton maackianus has not yet reappeared.Basing upon the view point of limnological ecosystem,this paper emphasizes the importance of the protection of the aquatic macrophyte communities.
作者
陈洪达
Chen Hongda(Institute of Hydrobiology,Academia Sinica)
出处
《海洋与湖沼》
1980年第3期275-284,共10页
Oceanologia Et Limnologia Sinica
