首页|Hydrochemical characteristics and the ecological effect of algal carbonic anhydrase in carbon cycle in the Taiyuan section of Fenhe River

Hydrochemical characteristics and the ecological effect of algal carbonic anhydrase in carbon cycle in the Taiyuan section of Fenhe River

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Water scarcity and pollution pose a threat to the sustainable development of cities and society.Therefore,it is crucial to analyze the hydrochemical characteristics and carbon dynamics of water-deficient areas.Taking 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 analysis.The ternary diagram demonstrates that the main water chemical type in Fenhe River was SO42-·CI--Na+.The Gibbs and end-member diagrams of each ion display that the chemical composition of surface water was mainly controlled by silicate decomposition.The chemical ions originated mainly from dissolution of some minerals,such as plagioclase,halite,dolomite,calcite,and gypsum.The diatoms had a lower CO2 requirement because they exhibited a higher abundance at a lower partial pressure of CO2(pCO2).However,high CO2 concentration had a positive effect on cyanobacteria,which reduced the active transport of HCO3-,saved the energy needed for this part of active transport,and indirectly improved the overall photosynthetic efficiency of algae.Carbonic anhydrase(CA)activity was significantly negatively correlated with pCO2 and positively correlated with HCO3-concentration,indicating that CA in water promoted the conversion of CO2 to HCO3.The HCO3 generated from this process continued to participate in the erosion of silicate rocks,sequestering CO2 in the form of CaCO3,which has a non-negligible impact on the carbon sink in the Fenhe River.These consequences may have important implications for the biogeochemical cycling occurring in urban water.

hydrochemistryinorganic carbonphytoplankton communitycarbonic anhydraseFenhe River

Jing YANG、Xin LI、Shulian XIE、Jia FENG

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Shanxi Key Laboratory of Yuncheng Salt Lake Ecological Protection and Resource Utilization,College of Life Sciences,Yuncheng University,Yuncheng 044000,China

School of Life Science,Shanxi University,Taiyuan 030006,China

Fundamental Research Program of Shanxi ProvinceFundamental Research Program of Shanxi ProvinceFundamental Research Program of Shanxi ProvinceFundamental Research Program of Shanxi ProvinceExcellent Doctoral Research Project in Shanxi ProvinceShanxi Scientific and Technological Innovation Team of Halophiles Resources Utilization

202103021223266202203021211313202303021211114202303021222246QZX-2023005202204051001035

2024

10.1007/s00343-024-3089-x

海洋湖沼学报(英文版)
中国海洋湖沼学会

海洋湖沼学报(英文版)

CSTPCD
影响因子：0.386
ISSN：2096-5508
年,卷(期)：2024.42(5)