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Related Experiment Videos

Eco-environmental evolution, control, and adjustment for Aibi Lake catchment.

Yibing Qian1, Zhaoning Wu, Liyun Zhang

  • 1Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China. dt6@ms.xjb.ac.cn

Environmental Management
|September 10, 2005
PubMed
Summary

Eco-environmental degradation in Aibi Lake catchment, Xinjiang, is evident due to climate change and human activities. Vegetation cover has shifted, soil properties altered, and dust days increased, necessitating land-use adjustments and dust control measures.

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Area of Science:

  • Ecology
  • Environmental Science
  • Arid Land Ecosystems

Background:

  • Aibi Lake in arid northern Xinjiang features a unique wetland-arid ecosystem.
  • The region faces eco-environmental degradation due to a drying climate and human activities.
  • Previous studies indicated spatial-temporal changes in vegetation and soil properties.

Purpose of the Study:

  • To investigate the spatial-temporal changes in vegetation cover and species composition.
  • To analyze alterations in soil physical and chemical properties within the Aibi Lake catchment.
  • To assess the impact of human activities and climate change on the eco-environment and identify causes of increased dust events.

Main Methods:

  • Field surveys to assess vegetation cover, species distribution, and soil characteristics across different landscape zones (alluvial-fluvial plains, desert, lakeshore, salinized land, sand desert).

Related Experiment Videos

  • Comparative analysis of vegetation cover and species composition with historical data from the 1950s.
  • Analysis of soil physical and chemical properties, comparing current data with the 1980s.
  • Examination of climatic data to identify trends in drifting dust days and correlation with land use.

    • Main Results:

    • Vegetation cover varies significantly, with higher cover in specific azonal vegetation areas (e.g., Phragmites communis marsh, Tamarix shrubs) reaching 80%, while desertified steppes and Haloxylon ammodendron deserts show 50-60% cover. Human disturbance leads to degraded herb vegetation.
    • Historical comparison shows slight increases in vegetation cover around the lakebed and river deltas since the 1950s, but a decrease in peripheral areas with degraded plant species.
    • Soil analysis reveals coarser surface soils in windward and dried lakebed areas, fine particle accumulation on the leeward side, and a marked decline in soil organic matter since the 1980s.
    • Climatic data analysis indicates an increase in drifting dust days over the past 20 years, with intensively developed land, bare lakebed, and abandoned cultivated land identified as significant dust sources.

    Conclusions:

    • Inappropriate human activities are the primary driver of eco-environmental degradation in the Aibi Lake catchment.
    • Observed changes in vegetation and soil properties, coupled with increased dust events, highlight the vulnerability of this arid wetland ecosystem.
    • Recommendations include land-use adjustment and targeted dust control measures to mitigate further degradation and restore ecosystem health.