汾河源头周丛藻类植物群落结构特征

基于对汾河源头流域周丛藻类植物群落进行的生态调查,共鉴定出周丛藻类植物24属47种,分别隶属于蓝藻(Cyanophyta)、红藻(Rhodophyta)、黄藻(Xanthophyta)、硅藻(Bacillariophyta)和绿藻(Chlorophyta)5个门。汾河源头流域的周丛藻类群落主要有5类,即颤藻群落(Oscillatoria community)、刚毛藻群落(Cladophora community)、无隔藻群落(Vaucheria community)、水绵-双星藻群落(Spirogyra-Zygnema community)和串珠藻群落(Batrachospermum community)。文章还对该地区的周丛藻类群落的种类组成、结构特征等进行了研究,分析了该流域中不同海拔梯度的变化对周丛藻类群落种类数的影响。结果表明海拔对周丛藻类植物的生长影响不明显,周丛藻类植物种数与水流速度之间存在负相关性。通过对周丛藻类植物种类组成、群落结构特征的研究,为汾河源头流域的环境保护和生物资源保护提供基础资料。

Characteristerics of periphyton community in the source of Fenhe River,North China

The periphyton community structure in the source of Fenhe River, North China was investigated. The results showed that there were 47 species and 24 genera in this area. They were belonging to 5 phyla, including Cyanophyta, Rhodophyta, Xanthophyta, Bacillariophyta and Chlorophyta. There were 5 types of periphyton community in the source of Fenhe River, namely Oscillatoria community, Cladophora community, Vaucheria community, Spirogyra-Zygnema community and Batrachospermum community. The composition, diversity and structure characters of periphyton were studied in this area. The relationships of the altitude, velocity and the number of the periphyton were also analyzed. The outcome indicated that the number of periphyton was negatively correlated with velocity, but has no relationship with altitude. The results also suggested the species of periphyton and the characteristic of community and could provide the basic information for environmental protection.