浅水湖泊沉积物生源要素与浮游藻类和沉水植物的关系
Relationships of biogenic elements in sediments with phytoplankton and submerged macrophytes in shallow lakes
投稿时间:2023-05-14  修订日期:2023-10-09
DOI:
中文关键词:长江中下游湖泊  沉积物  营养含量  沉水植物  定量关系
英文关键词:lakes of middle and lower reaches of the Yangtze River  sediment  nutrients content  submerged macrophytes  quantitative relations
基金项目:国家重点研发计划(2021YFC3200103);中国科学院水生生物研究所“生态文明”特色研究所服务性项目“阻隔湖泊鱼类群落机构调整及生态系统功能优化研究”(Y85Z0511);武汉市政建设集团有限公司科研项目(wszky202014)资助
作者单位E-mail
刘佳豪 大连海洋大学 水产与生命学院 liujh@ihb.ac.cn 
李艳* 中国科学院水生生物研究所淡水生态与生物技术国家重点实验室 liyan@ihb.ac.cn 
申东方 中国科学院水生生物研究所淡水生态与生物技术国家重点实验室 sdf990730@163.com 
乔瑞婷 中国科学院水生生物研究所淡水生态与生物技术国家重点实验室 15333068164@163.com 
王洪铸 中国科学院水生生物研究所淡水生态与生物技术国家重点实验室 wanghz@ihb.ac.cn 
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中文摘要:
      为探究长江中下游浅水湖泊沉积物碳、氮、磷等生源要素的含量及其对浮游藻类和沉水植物的影响,本研究以长江中下游11个浅水湖泊为研究对象,分析了2003年至2020年夏季时沉积物总氮(TNSed)、总磷(TPSed)和有机碳(TOCSed)含量与浮游藻类和沉水植物的关系。结果表明:(1)在长江中下游湖泊中,TPSed在藻型湖泊(0.71(0.24~1.14)g/kg)中最高,草型湖泊(0.52(0.34~0.62)g/kg)中最低。TNSed和TOCSed则在草型湖泊(TNSed:4.64(1.06~7.97)g/kg; TOCSed:55.89(4.64~101.69)g/kg)中最高,中间态湖泊(TNSed:1.86(0.71~3.64)g/kg; TOCSed:20.00(8.41~35.62)g/kg)中最低。(2)夏季浮游藻类叶绿素a含量(Chl a)随TPSed的增加而显著上升,沉水植物生物量(BMac)随TPSed的增加而显著下降,而TNSed和TOCSed对Chl a和BMac的影响不显著。(3)长江中下游湖泊夏季沉水植物消失的沉积物总磷阈值约为0.87~0.98 g/kg。以上研究结果表明:在长江中下游湖泊中,相比沉积物碳、氮含量,磷含量对浮游藻类和沉水植物生物量的预测力更高,进一步研究二者定量关系后可为评价水生态系统沉积物污染状况及确定水生植被修复的沉积物条件需求等提供科学依据。
英文摘要:
      To explore the effects of biogenic elements in sediments on phytoplankton and submerged macrophytes in shallow lakes of middle and lower reaches of the Yangtze River, the summer investigations in 11 shallow lakes from 2003 to 2020 were analyzed to explore the relationships between the nutrients content in sediments and the biomass of phytoplankton and submerged macrophytes. The results showed that: (1) Total phosphorus content in sediment (TPSed) was highest in algal-dominated lakes (0.71 (0.24-1.14) g/kg) and lowest in macrophyte-dominated lakes (0.52 (0.34-0.62) g/kg). Total nitrogen content in sediment (TNSed) and total organic carbon content in sediment (TOCSed) were highest in macrophyte-dominated lakes (TNSed: 4.64 (1.06-7.97) g/kg; TOCSed: 55.89 (4.64-101.69) g/kg) and lowest in intermediate lakes (TNSed: 1.86 (0.71-3.64) g/kg; TOCSed: 20.00 (8.41-35.62) g/kg). (2) Phytoplankton chlorophyll a content (Chl a) increased and biomass of submerged macrophytes (BMac) declined significantly with the increase of TPSed; however, TNSed and TOCSed had little effect on Chl a and BMac. (3) TPSed threshold for the disappearance of submerged macrophytes in summer was 0.87-0.98 g/kg approximately in the lakes of the middle and lower reaches of the Yangtze River. The results demonstrated that phosphorus content in sediment had a higher ability to predict Chl a and BMac in comparison with nitrogen and carbon content in the shallow lakes of the middle and lower reaches of the Yangtze River. More studies about the quantitative relations between them are needed to provide the scientific basis for the assessment of sediment pollution in aquatic ecosystems and determining the sediment condition requirements for submerged macrophytes during lake restorations.
刘佳豪,李艳,申东方,乔瑞婷,王洪铸.2024.浅水湖泊沉积物生源要素与浮游藻类和沉水植物的关系[J].水生态学杂志,45(4):19-27.
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