摘要
文章研究对比了青海湖水位上升后形成的新生湖滨带与主湖区在不同季节的水环境特征差异。结果显示,在测定的14个指标中,高锰酸盐指数、总磷、浊度和电导率等指标在湖滨带与主湖区间存在显著空间差异,而pH、总氮、溶解氧饱和度、水温、溶解氧浓度、溶解性磷、溶解性无机氮、氨氮、亚硝氮和硝酸盐氮等指标无显著空间差异;但结合各指标的变异系数、季节变化和主成分分析的结果来看,所有指标在新生湖滨带都表现出更大的变异系数,6月湖滨带样点主要在溶解性营养盐指标方面离散,8月湖滨带样点主要在淹没土壤释放物质相关指标方面离散,两者可能分别受到生物残体分解和淹没土壤释放的影响。研究的结果表明,青海湖的新淹没湖滨带的水环境特征与主湖区存在明显差异。土壤释放、生命活动、风浪、水深和温度等因素共同塑造了青海湖新生湖滨带的水环境特征。上述结果提示了青海湖部分湖滨带区域的水环境特征有利于刚毛藻生长,同时也可能受到刚毛藻暴发影响。新生湖滨带对青海湖水生态系统的持续影响还需要在后续研究中进一步关注。
Qinghai Lake is located at the northeastern edge of the Tibetan Plateau and has important ecological values.Although the intensity of human activities in the catchment is low and there is relatively weak pollution,the water quality of Qinghai Lake has worsened significantly in recent years compared to the 1950s and 1960s.In recent years,some lakeshore areas of Qinghai Lake have experienced a proliferation of Cladophora.It is also accompanied by a continuous rise in the water level of Qinghai Lake since 2004.The large amount of newly lakeshore zone formed by the rising water level may be accompanied by soil nutrient release.However,there is a lack of specific knowledge about what specific differences exist between the water environment conditions in the newly lakeshore zone and the main area of Qinghai Lake,as well as the spatial and temporal patterns of water quality in the lakeshore zone area.Based on the field monitoring data of the lakeshore zone and the main lake area in different seasons,this study compares the diffe-rences between the water environment characteristics of the newly lakeshore zone and the main lake area after the rising water level of Qinghai Lake,and analyzes the causes and potential impacts.It could lay the foundation for further estab-lishing the correlation between the outbreak of Cladophora and the rising water level process of Qinghai Lake.In this study,water samples were collected in the lakeshore zone and the main lake area of Qinghai Lake in June and August 2020,respectively.Water environmental indicators such as water temperature(WT),conductivity(EC),pH,dissolved oxygen concentration(DO),dissolved oxygen saturation(DO%),turbidity(Turb),total phosphorus(TP),dissolved re-active phosphorus(SRP),total nitrogen(TN),nitrate nitrogen(NO_(3)-N),ammonia nitrogen(NH_(3)-N),nitrite nitrogen(NO_(2)-N),dissolved inorganic nitrogen(DIN),and CODMn were obtained by field measurements and laboratory analy-sis.In the main lake area of Qinghai Lake,pH ranged from 9.05-9.20,DO ranged from 6.78-8.30 mg/
作者
马凯丽
熊雄
敖鸿毅
胡红娟
俞智鹏
赵邦明
马容真
吴辰熙
MA Kai-Li;XIONG Xiong;AO Hong-Yi;HU Hong-Juan;YU Zhi-Peng;ZHAO Bang-Ming;MA Rong-Zhen;WU Chen-Xi(Qinghai National Park Research Monitoring and Evaluation Center,Xining 810000,China;State Key Laboratory of Freshwater Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China;Qinghai Lake National Nature Reserve Administration,Xining 810000,China;Southwest University College of Resources and Environment,Chongqing 400716,China)
出处
《水生生物学报》
CAS
CSCD
北大核心
2022年第12期1788-1796,共9页
Acta Hydrobiologica Sinica
基金
第二次青藏高原综合科学考察研究(STEP,2019QZKK0304)
中国科学院青年创新促进会(2021339)资助。
关键词
青藏高原
气候变化
青海湖
水环境
水质
新生湖滨带
Qinghai-Tibet Plateau
Climate change
Qinghai Lake
Water environment
Water quality
New littoral zone
