洞头列岛大型底栖海藻的组成与区系分布

2007年10月至2009年6月对洞头列岛沿岸、羊栖菜养殖筏架和深水网箱网衣上的大型海藻进行了调查。结果表明，洞头列岛共有大型底栖海藻92种，隶属于51属，其中蓝藻门4属4种，红藻门30属50种，褐藻门10属17种，绿藻门7属21种。区系以暖温带性和亚热带性海藻为主，分别占总种数的64.13%和26.09%。受基质类型和海水混浊度的影响，洞头列岛海藻种类的水平分布和垂直分布均存在较大的差异。同时对羊栖菜栽培筏架上附着的大型海藻的调查结果进行比较分析，发现光照条件是影响海藻生长繁衍的重要生态因子，充足的光照能够弥补环境因子中的诸多欠缺，是海藻调查中应重点考虑的因素之一。

Floral analysis and species diversity survey of benthic macroalgae in Dongtou archipelago

In the paper, 51 genera 92 species of benthic macroalgae are recorded based on the investigation of Dongtou archipelago, including 4 genera 4 species of Cyanophyta, 30 genera 50 species of Rhodophyta, 10 genera 17 species of Phaeophyta and 7 genera 21 species of Chlorophyta. Floristic characteristics of main constructive species of macroalgae: the warm temperate and subtropical species are dominant species which accounted for 64.13% and 26.09% of total species respectively. The characteristics of algae flora show that Dongtou archipelago is a typical transitional area of warm temperate to subtropical. For the substrate and turbidity, the differences between the horizontal and vertical distribution of the macroalgae are great. Furthermore, Comparing macroalgae attached on Sargassum fusiform culture rafts and normal condition, it shows that: light plays an important part in macroalgae growth and multiplication. More attention should be paid to light factor in the future floristic investigation of macroalgae.