摘要
乌梁素海是全球荒漠半荒漠地区极为少见的大型草原湖泊,是我国北方侯鸟重要的迁徙和繁殖地,2002年被国际湿地公约组织正式列入国际重要湿地名录.为了对乌梁素海的浮游动物及底栖动物进一步深入的研究,从2004年4月至2005年1月共进行了4次监测.浮游动物共检出34属62种,比20年前减少3种.其中原生动物11属16种;轮虫17属33种;枝角类4属4种;桡足类5属9种.大型浮游动物(包括枝角类、桡足类及轮虫)全年平均丰度为687ind./L,平均生物量为3.4985mg/L;原生动物平均丰度为2.508×104ind./L,平均生物量为0.1254mg/L.底栖动物共检出4科11种,比20年前减少39种.底栖动物两次调查的平均丰度为3031.4ind./m2,平均生物量为71.67g/m2.调查结果显示,随着季节的变化,浮游动物丰度及生物量变化幅度很大,夏季最高,春季次之,秋冬两季极低.利用浮游动物和底栖动物生物量作为水体状况评价指标对乌梁素海营养状况进行初步评价,得出乌梁素海水体处于富营养化状态.
Lake Wuliangsuhai is a very important part of irrigation and drainage system of Hetao irrigation area. It is also an important migration and breeding ground for Northern China migratory birds. The wetland was listed in 〈Convention of Wetland on the List of International Important Wetland〉 in 2002. The present investigation deals with the aquatic status of Lake Wuliangsuhai from April 2004 to January 2005. The study revealed that there were 62 species of zooplankton belong to 34 genera in the lake, which include 16 species of Protozoa belong to 11 genera, 33 species of Rotifera belong to 17 genera, 4 species of Cladocera belong to 4 genera, and 9 species of Copepodo belong to 5 genera. The average abundance and biomass of macrozooplankton were 687ind./L and 3.4985mg/L and Protozoa were 2.508×10^4 ind./L and 0.1254mg/L, respectively. There were 11 species of zoobenthos found in the lake, which belong to 4 families. The average abundance and biomass of zoobenthos were 3031.4ind./mz and 71.67g/mz, The abundance and biomass of zooplankton changed significantly with seasons. The abundance and biomass in the Spring and Summer are dramatically higher than in Autumn and Winter. The biomass of zooplankton and zoobenthos were used as indicators of water body status to evaluate the nutritional status and the results showed that the lake was in the status of eutrophication.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2008年第4期538-543,共6页
Journal of Lake Sciences
基金
国家自然科学基金项目(50269001
50569002)资助
关键词
乌梁素海
浮游动物
底栖动物
营养状况
Lake Wuliangsuhai
zooplankton
zoobenthos
nutritional status
