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Hydrochemical characteristics and the ecological effect of algal carbonic anhydrase in carbon cycle in the Taiyuan section of fenhe river

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Journal of Oceanology and Limnology 2024年第5期42卷 1507-1524页

作者： Jing YANG Xin LI Shulian XIE Jia FENG Shanxi Key Laboratory of Yuncheng Salt Lake Ecological Protection and Resource Utilization College of Life SciencesYuncheng UniversityYuncheng 044000China School of Life Science Shanxi UniversityTaiyuan 030006China

Water scarcity and pollution pose a threat to the sustainable development of cities and ***,it is crucial to analyze the hydrochemical characteristics and carbon dynamics of waterdeficient *** the Taiyuan section of fenhe river as the research object,we systematically explored the hydrochemical characteristics of surface water and its evolutionary processes,as well as the ecological effect of algal carbonic anhydrase in carbon cycle using the hydrochemical evolution method and correlation *** ternary diagram demonstrates that the main water chemical type in fenhe river was SO^(2-)_(4)·Cl^(-)-Na^(+).The Gibbs and end-member diagrams of each ion display that the chemical composition of surface water was mainly controlled by silicate *** chemical ions originated mainly from dissolution of some minerals,such as plagioclase,halite,dolomite,calcite,and *** diatoms had a lower CO_(2)requirement because they exhibited a higher abundance at a lower partial pressure of CO_(2)(p CO_(2)).However,high CO_(2)concentration had a positive effect on cyanobacteria,which reduced the active transport of HCO_(3)^(-),saved the energy needed for this part of active transport,and indirectly improved the overall photosynthetic efficiency of *** anhydrase(CA)activity was significantly negatively correlated with p CO_(2)and positively correlated with HCO_(3)^(-)concentration,indicating that CA in water promoted the conversion of CO_(2)to HCO_(3)^(-).The HCO_(3)^(-)generated from this process continued to participate in the erosion of silicate rocks,sequestering CO_(2)in the form of Ca CO_(3),which has a non-negligible impact on the carbon sink in the fenhe *** consequences may have important implications for the biogeochemical cycling occurring in urban water.

关键词： hydrochemistry inorganic carbon phytoplankton community carbonic anhydrase fenhe river

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