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Human impact on current environmental state in Chinese lakes

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DOI

  • Qianhong Wang, CAS - Nanjing Institute of Geography and Limnology, University of Chinese Academy of Sciences
  • ,
  • Yun Li, CAS - Nanjing Institute of Geography and Limnology
  • ,
  • Le Liu, CAS - Nanjing Institute of Geography and Limnology, University of Chinese Academy of Sciences
  • ,
  • Suzhen Cui, CAS - Nanjing Institute of Geography and Limnology, University of Chinese Academy of Sciences
  • ,
  • Xia Liu, CAS - Nanjing Institute of Geography and Limnology
  • ,
  • Feizhou Chen, State Key Laboratory of Lake Science and Environment, CAS - Nanjing Institute of Geography and Limnology, Sino-Danish Center
  • ,
  • Erik Jeppesen

Anthropogenic and natural disturbance to inland aquatic ecosystems displays a notable spatial difference, yet data to measure these differences are scarce. This study encompasses 217 lakes distributed over five lake regions of China and elucidates the environmental factors determining the spatial variability of the water quality and trophic status. A significant correlation between human modification index in surrounding terrestrial systems (HMT) and trophic status of lake ecosystems (TSI) was found, and the regression slope in each region was similar except in the Qinghai-Tibet Plateau region. It was further noted that the pattern of environmental factor network (EF network) differed among freshwater and saline lakes. The EF network was complex for freshwater lakes in less human-influenced areas, but intensive man-made influence disrupted most relationships except for those between total nitrogen, total phosphorus, chlorophyll-a, and water turbidity. As for regions including saline lakes, correlations among water salinity and organic forms of carbon and nitrogen were apparent. Our results suggest that HMT and EF network can be useful indicators of the ecological integrity of local lake ecosystems, and integrating spatial information on a large scale provides conservation planners the option for evaluating the potential risk on inland aquatic systems.

OriginalsprogEngelsk
TidsskriftJournal of Environmental Sciences
Vol/bind126
Sider (fra-til)297-307
Antal sider11
ISSN1001-0742
DOI
StatusUdgivet - apr. 2022

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