Variations of sediment organic phosphorus and organic carbon during the outbreak and decline of algal blooms in Lake Taihu,China  

作　　者：Jiehua Wang Xiuling Bai Wenchao Li Pingping Zhang Mengdi Zhang Haoran Wang Yingge Bai 

机构地区：[1]College of Geography and Environmental Science,Henan University,Kaifeng 475004,China [2]Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions(Henan University),Ministry of Education,Kaifeng 475004,China [3]National Demonstration Center for Environment and Planning,Henan University,Kaifeng 475004,China [4]Surrey International Institute,Dongbei University of Finance and Economics,Dalian 116000,China

出　　处：《Journal of Environmental Sciences》2024年第5期34-45,共12页环境科学学报（英文版）

基　　金：jointly sponsored by the National Natural Science Foundation of China(No.41371450);the Natural Science Foundation of Henan(No.222300420418);the Postgraduate Cultivating Innovation and Quality Improvement Action Plan of Henan University(No.SYLYC2022015)。

摘　　要：In this study,sediment organic phosphorus(OP)and organic carbon(OC)in Lake Taihu,China,as well as their relationships,were analyzed during the outbreak and decline of algal blooms(ABs)over a five-month field study.The results showed synchronous temporal changes in the sediment OP and OC contents with the development of ABs.In addition,there was a significant positive correlation between the sediment OP and OC(p<0.01),suggesting simultaneous deposition and consumption during the ABs outbreak.The sediment OP and OC contents decreased significantly at the early and last stages of the ABs outbreak and increased at the peak of the ABs outbreak and during the ABs decline.These temporal variation patterns suggest that the sediment OC and OP contents did not consistently increase during the ABs outbreak,even though algae are an important source of organic matter in sediments.The depletion or enrichment of OC and OP in sediments may also depend on the scale of the ABs outbreak.The obtained results revealed significant differences in the sediment OC and OP contents between the months(p<0.05).In addition,OP in the sediments was dominated by orthophosphate diester(phospholipids and DNA-P)and orthophosphate monoester during the ABs outbreak and decline,respectively.The active OC contents and proportions in the sediments in the ABs outbreak were significantly lower than those observed in the ABs decline period,demonstrating the significant impacts of the ABs outbreak and decline on the sediment OC and OP in Lake Taihu.

关 键 词：Algal blooms Organic phosphorus Organic carbon SEDIMENT ^(31)P NMR Lake Taihu 

分 类 号：X524[环境科学与工程—环境工程]