首页|Greenhouse gas emissions from Daihai Lake,China:Should eutrophication and salinity promote carbon emission dynamics?

Greenhouse gas emissions from Daihai Lake,China:Should eutrophication and salinity promote carbon emission dynamics?

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Greenhouse gases(GHGs)emitted or absorbed by lakes are an important component of the global carbon cycle.However,few studies have focused on the GHG dynamics of eutrophic saline lakes,thus preventing a comprehensive understanding of the carbon cycle.Here,we conducted four sampling analyses using a floating chamber in Daihai Lake,a eutrophication saline lake in Inner Mongolia Autonomous Region,China,to explore its carbon dioxide(CO2)and methane(CH4)emissions.The mean CO2 emission flux(FCO2)and CH4 emission flux(FCH4)were 17.54±14.54 mmol/m2/day and 0.50±0.50 mmol/m2/day,respectively.The re-sults indicated that Daihai Lake was a source of CO2 and CH4,and GHG emissions exhibited temporal variability.The mean CO2 partial pressure(pCO2)and CH4 partial pressure(pCH4)were 561.35±109.59 patm and 17.02±13.45 patm,which were supersaturated relative to the atmosphere.The regression and correlation analysis showed that the main influencing factors of pCO2 were wind speed,dissolved oxygen(DO),total nitrogen(TN)and Chlorophyll a(Chl.a),whereas the main influencing factors of pCH4 were water temperature(WT),Chl.a,nitrate nitrogen(NO3--N),TN,dissolved organic carbon(DOC)and water depth.Salinity reg-ulated carbon mineralization and organic matter decomposition,and it was an important influencing factor of pCO2 and pCH4.Additionally,the trophic level index(TLI)significantly increased pCH4.Our study elucidated that salinity and eutrophication play an important role in the dynamic changes of GHG emissions.However,research on eutrophic saline lakes needs to be strengthened.

EutrophicationSalinityGreenhouse gas emissionsInland lakeInner Mongolia Autonomous Region

Xiangwei Li、Ruihong Yu、Jun Wang、Heyang Sun、Xinyu Liu、Xiaohui Ren、Shuai Zhuang、Zhiwei Guo、Xixi Lu

展开 >

Inner Mongolia Key Laboratory of River and Lake Ecology,School of Ecology and Environment,Inner Mongolia University,Hohhot 010070,China

Key Laboratory of Mongolian Plateau Ecology and Resource Utilization,Ministry of Education,Hohhot 010070,China

Autonomous Region Collaborative Innovation Center for Integrated Management of Water Resources and Water Environment in the Inner Mongolia Reaches of the Yellow River,Hohhot 010018,China

Department of Geography,National University of Singapore,117570,Singapore

展开 >

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaMajor Science and Technology Projects of Inner Mongolia Autonomous RegionMajor Science and Technology Projects of Inner Mongolia Autonomous RegionKey Scientific and Technological Project of Inner MongoliaOpen Project Program of the Ministry of Education Key Laboratory of Ecology and Resources Use of the Mongolian Plateau

2021YFC320120351869014522790672020ZD0009ZDZX20180542019GG019KF2020006

2024

10.1016/j.jes.2022.12.021

环境科学学报(英文版)
中科院生态环境研究中心

环境科学学报(英文版)

CSTPCD
影响因子：0.862
ISSN：1001-0742
年,卷(期)：2024.135(1)
  • 1