陈桥东湖是新乡黄河湿地鸟类国家级自然保护区中部实验区的常年集水区之一,是许多珍稀鸟类的繁殖及栖息地,具有重要的生物多样性保护和潜在的科学研究、生态旅游价值。为了解陈桥东湖浮游生物群落结构特征及水质状况,于2017年1月、4月、7月和10月对陈桥东湖进行浮游生物采样调查,并利用浮游生物多样性指数评价水质状况。结果共发现浮游植物有8门67属118种,其中绿藻47种,种类最多,占39.83%;其次是硅藻,有35种;甲藻最少,只有2种。各采样点浮游植物丰度变化范围为(2.52~39.7)×106 cells/L,全年主要优势门类为硅藻、绿藻和蓝藻。共发现浮游动物34种,轮虫种类最多,共21种,占61.76%;丰度变化为68~1 342 cells/L。全年轮虫为主要优势种类,轮虫滤食者RF为主要浮游动物功能群。浮游生物多样性指数结果显示陈桥东湖水体整体呈中度污染状况,且夏季最差,冬季相对较好,与水体理化指标调查结果一致。研究成果可为新乡黄河湿地水环境保护及生态修护提供参考依据。
Abstract
Chenqiao East Lake is one of the perennial catchments in the middle experimental zone of Xinxiang Yellow River Wetland Bird National Nature Reserve, which is a breeding and habitat for many rare birds with important values for biodiversity conservation and potential scientific research and ecological tourism. To understand the plankton community structure and the water quality state in Chenqiao East Lake, we collected plankton samples in the studied lake in January (winter), April (spring), July (summer) and October (autumn) of 2017, and at the same time evaluated the water quality status by analyzing plankton diversity index. Results revealed a total of 118 species of phytoplankton belonging to 67 genera and 8 phylum, dominated by Chlorophyta (47 species) accounting for 39.83% of the total species, followed by diatoms (35 species), and Dinoflagellate of only two species. The abundance of phytoplankton varied from 2.52×106 to 39.7×106 cells/L. The main dominant species were Bacillariophyta, Chlorophyta and Cyanophyta. Moreover, we identified a total of 34 species of zooplankton, with primary dominance by Rotifer (21 species) taking up 61.76% of the total species. The abundance of zooplankton varied from 68 to 1 342 cells/L. The main dominant species was rotifer, while rotifers filter feeders (RF) was the main zooplankton functional group. The results of plankton diversity index showed that the water bodies in Chenqiao East Lake were moderately polluted, worst in summer and relatively good in winter, which was consistent with the investigation results of physical and chemical indexes of water bodies.
关键词
浮游生物 /
群落结构 /
水质评价 /
新乡黄河湿地 /
陈桥东湖
Key words
plankton /
community structure /
water quality evaluation /
Xinxiang Yellow River Wetland /
Chenqiao East Lake
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基金
新乡国家级自然保护区管理处鸟类饵料调查项目(2015JJ137)
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