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<p>Natural wetlands act as analogues to nature-based solutions for biodiversity conservation, carbon burial and pollution control in degraded lakes, but the extent to which they help restore the alpine lakes remains poorly understood. Here, we employed sedimentary ancient DNA and pigments to reconstruct multidecadal changes in algal communities and diversity in a glacier-fed lake on the Tibetan Plateau, where surrounding wetlands have expanded rapidly over the past two decades. Ecological shifts predominantly occurred after the 2000s, with algal biomass declining alongside lake and wetland expansion, increased eukaryotic algal diversity and decreased cyanobacterial diversity. Against regional warming and intensified human activities, natural wetland buffering capacity prevents further ecological deterioration. These findings highlight natural wetland reserves as analogues to nature-based solutions for mitigating ecological deterioration, safeguarding biodiversity and advancing sustainable development. They also inform biodiversity conservation measures for future application of nature-based solutions in vulnerable alpine ecosystems.</p>

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Nature-based solutions can mitigate climate and human-induced threats to alpine aquatic ecosystems

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月20日

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  • Chenliang Du,
  • Ke Zhang,
  • Qi Lin,
  • Shixin Huang,
  • Yaoyao Han,
  • Ji Shen

摘要

Natural wetlands act as analogues to nature-based solutions for biodiversity conservation, carbon burial and pollution control in degraded lakes, but the extent to which they help restore the alpine lakes remains poorly understood. Here, we employed sedimentary ancient DNA and pigments to reconstruct multidecadal changes in algal communities and diversity in a glacier-fed lake on the Tibetan Plateau, where surrounding wetlands have expanded rapidly over the past two decades. Ecological shifts predominantly occurred after the 2000s, with algal biomass declining alongside lake and wetland expansion, increased eukaryotic algal diversity and decreased cyanobacterial diversity. Against regional warming and intensified human activities, natural wetland buffering capacity prevents further ecological deterioration. These findings highlight natural wetland reserves as analogues to nature-based solutions for mitigating ecological deterioration, safeguarding biodiversity and advancing sustainable development. They also inform biodiversity conservation measures for future application of nature-based solutions in vulnerable alpine ecosystems.