Responses of alkaline phosphatase activity to wind-driven waves in a large,shallow lake:Implications for phosphorus availability and algal blooms  

作　　者：Jian Zhou Xiaoxia Han Boqiang Qin Guangwei Zhu 

机构地区：[1]Taihu Laboratory for Lake Ecosystem Research,State Key Laboratory of Lake Science and Enuvironment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China [2]Laboratory and Analytical Testing Center,Jiangsu Academy of Enuironmental Sciences Environmental Technology Co.,Ltd,Nanjing 210036,China [3]School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China

出　　处：《Journal of Environmental Sciences》2021年第1期143-150,共8页环境科学学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.41701098,41621002,and 41830757);the Major Science and Technology Program for Water Pollution Control and Treatment(No.2018ZX07701001-24);“One-Three-Five”Strategic Planning of Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences(Nos.NIGLAS2017GH03,NIGLAS2017GH04,and NIGLAS2017GH05)。

摘　　要：Phosphorus is a vital nutrient for algal growth,thus,a better understanding of phosphorus availability is essential to mitigate harmful algal blooms in lakes.Wind waves are a ubiquitous characteristic of lake ecosystems.However,its effects on the cycling of organic phosphorus and its usage by phytoplankton remain poorly elucidated in shallow eutrophic lakes.A mesocosm experiment was carried out to investigate the responses of alkaline phosphatase activity fractions to wind waves in large,shallow,eutrophic Lake Taihu.Results showed that wind-driven waves induced the release of alkaline phosphatase and phosphorus from the sediment,and dramatically enhanced phytoplanktonic alkaline phosphatase activity.However,compared to the calm conditions,bacterial and dissolved alkaline phosphatase activity decreased in wind-wave conditions.Consistently,the gene copies of Microcystis phoX increased but bacterial phoX decreased under wind-wave conditions.The ecological effects of these waves on phosphorus and phytoplankton likely accelerated the biogeochemical cycling of phosphorus and promoted phytoplankton production in Lake Taihu.This study provides an improved current understanding of phosphorus availability and the phosphorus strategies of plankton in shallow,eutrophic lakes.

关 键 词：Wind waves Alkaline phosphatase activity PHOSPHORUS PLANKTON PHOX 

分 类 号：X524[环境科学与工程—环境工程]