长江流域安庆段植物多样性研究

Study on the Plant Diversity within Anqing Section of the Yangtze River Valley

本文对长江安庆段植物群落进行了实地调查,以掌握该区域的植物资源现状,进而为长江生态环境保护提供数据支撑。结果表明,该区域维管植物共计70科207属325种,其中蕨类植物6科7属7种,裸子植物1科2属2种(均为栽培种),被子植物63科198属316种;优势科为禾本科、菊科、莎草科。被子植物区系中,泛热带分布占比最高,为23.74%;其次为世界分布和北温带分布,占比分别为20.20%和19.19%;研究区植物属的区系以温带性质略占优势。该区域乔木层的平均蓄积量为103.24 m^(3)/hm^(2),18个代表性草本植物的平均生物量为1 648.36 g/m^(2)。

In this paper,a field survey was made on the plant community within Anqing section of the Yangtze River Valley so as to understand the plant resource actuality in the region and provide data support for the eco-environment conservation of the Yangtze River Valley.The results showed that there were a total of 325 vascular plant species belonging to 207 genera in 70 families,including 7 pteridophyte species belong to 7 genera in 6 families,2 gymnosperm species belonging to 2 genera in 1 family,316 angiosperm species belonging to 198 genera in 63 families.The dominant families include Poaceae,Asteraceae,and Cyperaceae,with 23.74%,the highest proportion of subtropical angiosperm species,followed by 20.20% globally distributed and 19.19%northern temperate angiosperm species.The flora in the section are slightly dominated by temperate species.The average volume in the tree layer is 103.24 m/hm^(2),and the average biomass of 18 representative herbaceous plants is 1648.36 m^(3)/hm^(2).