兰州五泉山的藻类及其分布

Species composition and distribution of algae in Wuquanshan of Lanzhou

以兰州五泉山为该地藻种资源库,对其中水生、陆生生境中藻类的种类多样性、群落结构、分布特点进行了研究.结果发现该地藻类植物65种 含4变种 ,包括蓝藻、绿藻、硅藻和红藻,其中硅藻种类最多 29种 ,其它依次为蓝藻 24种 、绿藻 11种 和红藻 1种 .水体中共42种,硅藻最多,有26种,其次蓝藻8种,绿藻7种,红藻1种,不同水体中优势种和亚优势种不同.土壤生境中发现20种,蓝藻13种,绿藻4种,硅藻3种,且非洲席藻和小球藻分为优势种和亚优势种.7个种类在水、陆两大生境都有分布,而且它们主要是丝状蓝藻.

A variety of aquatic and soil samples were collected from Wuquanshan of Lanzhou in 2002, species diversity, community structure and distribution of algae were studied, and some suggestions on potential application of algae in local ecological re-construction had been given. A total of 65 algal taxa (including 4 varieties) were found, in which diatoms 29, blue-green algae 24, green algae 11 and red alga 1. Forty two species of algae occurred in the aquatic environments, of which diatoms had the largest species diversity (26), then followed by blue-green algae (8), green algae (7) and red alga (1). The first and second dominant species were different in different aquatic habitats. There were 20 species of algae in the topsoil, in which cyanobacteria 13, green algae 4 and diatoms 3. Phormidium africanum and Chlorella vulgaris were respectively the first and the second dominant species. Seven algal taxa distributed in both aquatic and soil environments, and most of them were filamentous cyanobacteria.