水资源保护2016，Vol.32Issue(5)：115-122,8.DOI:10.3880/j.issn.1004-6933.2016.05.022
洪泽湖浮游藻类变化动态及影响因素
Seasonal dynamics of and factors in phytoplankton in Hongze Lake
摘要
Abstract
In order to explore the temporal-spatial pattern of phytoplankton distribution in Hongze Lake and associated factors, we sampled surface water 20 times at 11 sites across the lake from July 2011 to October 2013, and obtained physical and chemical indices of phytoplankton and water quality. We processed the data using the Shannon-Wiener index H and dominance index Y. Then, we found 144 phytoplankton species belonging to 60 genera, and seven phyla ( including 66 species of green algae, 36 species of diatoms, 23 species of cyanobacteria, and 13 species of euglena) . The phytoplankton distribution presented an obvious spatial-temporal variability. The species richness was at a high level in the summer, at an intermediate level in the autumn, and at low levels in the winter and spring;it exhibited large values in the northwestern part ( Chengzi Lake area) and the inflow area of the lake ( site Lihewa) , and small values in the central area and the outflow area of the lake. The average cell density of phytoplankton ranged from 1. 57 × 106 to 6. 04 × 106 cells/L. The cell density was higher in the summer and autumn, and lower in the winter and spring;it exhibited large values in the Chengzi Lake area and small values at the inflow and outflow areas of the lake. Data analysis shows that the temporal dynamics of the species composition and cell density were significantly associated with the seasonal variations of water temperature, water level, and nutrients ( mainly total nitrogen and total phosphorus) , while the spatial dynamics of the species composition and cell density were correlated with the spatial variations of hydrodynamic factors and nutrients ( particularly ammonia nitrogen) . We suggest restricting nutrient input and modulating the hydrological dynamics of Hongze Lake, in order to prevent algal blooms in the lake.关键词
浮游藻类/空间差异/季节动态/水质/洪泽湖Key words
phytoplankton/spatial disparity/seasonal dynamics/water quality/Hongze Lake分类
资源环境引用本文复制引用
舒卫先,张云舒,韦翠珍..洪泽湖浮游藻类变化动态及影响因素[J].水资源保护,2016,32(5):115-122,8.基金项目
淮河流域重要河湖健康评估试点项目(1261320320004) （1261320320004）
