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Impact of Water-Sediment Regulation on Variations of Amino Acids in the middle-lower yellow river, China

Journal of Ocean University of China 2020年第2期19卷 369-376页

作者： ZHANG Kun ZOU Li DAI Qunying WANG Jian JIANG Xueyan LIANG Shengkang College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Environment and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China SGS-CSTC Standards Technical Services(Qingdao)Co. Ltd.Qingdao 266101China Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationOcean University of ChinaQingdao 266100China

In order to examine the impacts of water-sediment regulation on regional carbon cycling,we collected water,particulate and sediment samples from the middle-lower yellow river in late June and early July,2015 and analyzed their specific amino acids(AA),DOC,POC,and bacteria *** by 14 specific AA,the total hydrolysable AA(THAA),particulate AA(PAA),and sediment AA(SAA)varied in ranges of 2.29-9.05μmol L^-1,5.22-22.96μmol L^-1,and 81.7-137.19μg g^-1 dry *** the regulation,dissolved free AA(DFAA)decreased by 29%while DCAA increased by 72%.These variations suggested that DFAA were further degraded,while DCAA molecules were further ***,PAA increased almost 4 times as many as those before regulation,and SAA increased as *** regulation,the amounts of bioactive amino acids(Asp,Glu and Gly)increased in THAA but decreased in PAA,with little changes in *** ratios of Asp/Gly in different phases increased after regulation,indicating the AA contributions were promoted by calcareous organisms rather than by siliceous *** correlation analysis showed that PAA was primary representatives of AA and organic carbon,followed by DCAA and ***,bacterial reproduction played a key role in shaping the AA compositions and properties,followed by the redox condition and acid-base *** results of this study provided a clear evidence for the effects of water-sediment regulation on regional biogeochemistry of organic carbon in the middle-lower yellow river.

关键词： the middle-lower yellow river water-sediment regulation amino acids organic carbon

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