Abstract Dating recent lava flows is a critical issue to assess the volcanic hazards for nearby human populations, but traditional methods such as radiocarbon dating are often not applicable. We propose here a simple statistical method that relates the age of lava flows of the Piton de la Fournaise volcano (PdF) to the size of Agarista salicifolia (Ericaceae), a long-lived pioneer tree that quickly establishes after eruption and able to live > 600 years. We measured the diameter at base of 711 trees on 20 dated lava flows (between 1401 CE and 2007 CE). We used a log-log linear model to assess the relationship between maximum diameter at base of Agarista salicifolia and the age of lava flows, and showed a very strong correlation (R2 = 0.987, p

中文翻译：

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从长寿先锋树的大小分布确定 Piton de la Fournaise 火山的年轻（<1000 年）熔岩流喷发

摘要 对近期熔岩流进行测年是评估附近人口火山危害的关键问题，但传统方法如放射性碳测年通常不适用。我们在此提出了一种简单的统计方法，将 Piton de la Fournaise 火山 (PdF) 的熔岩流年龄与 Agarista salicifolia（杜鹃花科）的大小联系起来，杜鹃花科是一种在喷发后迅速建立并能够生存的长寿先锋树 > 600 年。我们测量了 20 个年代的熔岩流（公元 1401 年到 2007 年之间）的 711 棵树根部的直径。我们使用 log-log 线性模型来评估 Agarista salicifolia 基部最大直径与熔岩流年龄之间的关系，并显示出非常强的相关性 (R2 = 0.987, p