官港湿地狗尾草+碱蓬草地群落结构研究

Studies on community structure of land dominated by Setaria viridis + Suaeda glauca in Guangang Wetland

该研究以官港湿地草本植物群落为主要研究对象,采用实地调查与内业统计分析相结合的方法,对草本植物群落的物种组成、生活型、综合优势比、丰富度指数、多样性指数、种群分布格局等内容进行深入研究,结果表明:该群落有物种20种,隶属于9个科,20个属,其中禾本科占25%,主要生活型为地面芽和1年生草本;狗尾草和碱蓬为该群落的优势种;多样性分析表明该群落物种多样性较高,分布较均匀,群落结构较稳定;种群分布格局中19种为集群分布,只有菟丝子为随机分布。

In this study,the species composition,life form,summed dominance ratio,richness index,diversity index,population distribution of herb community in Guangang Wetland were studied by field investigation combined with statistical analysis.The results indicated：the community contained 20 herb species,belonging to 20 genuses,nine families.Of these species,25% were Gramineae.The main life forms were hemicryptophytes（H）and annual herb（Th）,which occupying 50% respectively.Setaria viridis and Suaeda glauca were dominant species in this community.Diversity analysis showed that the species diversity was high,distributed uniformly,and community structure was stable.As for population distribution pattern,except Cuscuta chinensis which was randomly distributed,the other 19 species were aggregated.