升高的温度重塑了北极的植物生物多样性和生态系统

Nature Communications, 30 April 2025

A study monitoring Arctic plant diversity in response to climate change finds that 60% of more than 2,000 monitored plots spread across the Circumpolar North have endured extensive changes, either gaining new species and/or loosing existing ones over the past four decades. The greatest species gains and losses occurred in areas where temperatures increased the most. Extended growing seasons paired with reduced snow cover can alter the distribution and number of unique species living in Arctic tundra, and permafrost thaw can lead to new growth of wetland plant communities. Species specialized to live in cold environments are particularly vulnerable to competitors taking over their resources, leading to a greater risk of local extinction as rising temperatures shift habitats faster than species can migrate. Continued increases in shrub populations will likely decrease overall biodiversity over time. Changes in vegetation serve as an early warning signal of larger ecosystem changes, with impacts extending to wildlife, humanity, and the Arctic’s ability to sequester carbon.

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