北仑河口国家级自然保护区红树植物群落研究

Ecological characteristics of habitat condition,flora,type,physiognomy,structure,species diversity and succession of mangrove communities in Beilunhekou National Nature Reserve,Guangxi,were systematically analyzed.14 species of mangrove plants,belonging to 11 families and 14genera,were found in the Reserve.Among them,11 species are true mangrove and 4 species are semi-mangrove.The true mangrove communities can be classified into 8 formations and 14 community types,and the main constructive species are Acrostichum aureum,Avicennia marina,Aegiceras corniculatum,Kandelia candel,Bruguiera gymnorrhiza,Excoecaria agallocha,Acanthus ilicifolius and Heritiera littoralis,respectively.The semi-mangrove communities can be classified into 2 formations and 2 community types,and the main constructive species are Hibiscus tiliaceus and Cerbera manghas,respectively.The Simpson index (D) of species diversity for the mangrove communities range from 1.09 to 5.34,Shannon-Weiner index (H) from 0.25 to 2.56,probability of interspecific encounter (PIE) from 0.08 to 0.82,and evenness (E) from 0.25 to 0.95.