水生生物学报2018，Vol.42Issue(3)：622-634,13.DOI:10.7541/2018.078
仙女湖及入湖河流浮游植物功能类群与环境因子的相互关系
RELATIONSHIP BETWEEN PHYTOPLANKTON MORPHOLOGY-BASED FUNCTIONAL GROUPS AND ENVIRONMENTAL FACTORS OF DIFFERENT HABITAT IN THE LAKE XIANNü AND INFLOW RIVERS
摘要
Abstract
Phytoplankton is an essential component for the functioning of material cycle and energy flow which ac-counts for half of earth's primary production. Meanwhile, phytoplankton community structure and distribution are im-portant indicators of water environment and its quality. Identifying the main factors driving phytoplankton community structure is essential for better understanding and therefore managing freshwater ecosystem. Hence, we investigated phytoplankton community structure, morphology-based functional groups and temporal and spatial distribution of these groups among Lake Xiannü and inflow rivers during 2014—2015. There were 82 species of 7 phyla recorded, includ-ing 15 species of Cyanophyta, 33 species of Chlorophyta, 23 species of Bacillariophyta, 3 species of Pyrrophyta, 5 spe-cies of Euglenophyta, 2 species of Cryptophyta and 1 species of Chrysophyta. The average phytoplankton density and biomass were in ranges of 7.95×106—2.19×109ind./L and 10.52—792.91 mg/L, respectively. Non-flagellated, with siliceous exoskeletons phytoplankton (Group Ⅵ, diatom) was the dominant species in river habitat in spring and au-tumn. Unicellular flagellates of medium to large phytoplankton (Group Ⅴ, Cryptophyta and Pyrrophta) was the domi-nant species in lake zones. Although biomass of Group Ⅵ phytoplankton was relatively high in different habitats, large filaments with aerotopes phytoplankton (Group Ⅲ) and large mucilaginous colonies (Group Ⅶ), such as Cyanophyta, increased significantly between summer and autumn. Analysis of the relationship between phytoplankton morphology-based functional groups and environmental factors found that the biomass of Group Ⅴ and Ⅵ was affected by the TN and TP concentration in winter and spring. In summer and autumn, phytoplankton of Group Ⅲ and Ⅶ were affected by multiple factors including water temperature, turbidity and TN and TP concentrations.关键词
仙女湖/入湖河流/浮游植物/群落结构/功能类群Key words
Lake Xiannü/Inflowing rivers/Phytoplankton/Community structure/Morphology-based functional groups分类
生物科学引用本文复制引用
于晨,张萌,陈宏文,周慜,王韬,李超,张敏..仙女湖及入湖河流浮游植物功能类群与环境因子的相互关系[J].水生生物学报,2018,42(3):622-634,13.基金项目
国家江河湖泊生态环境保护专项-仙女湖生态安全基线调查项目(JXHK14050015) （JXHK14050015）
国家自然科学基金(31200359)资助[Supported by the Special Projects for Ecological and Environmental Protection of Rivers and Lakes(JXHK14050015) （31200359）
the National Natural Science Fund of China(31200359)] （31200359）
