Abstract In spite of enormous diversity in tree species, dendrochronological records in the tropical Andes are very scarce. Therefore, it is necessary to increase the search for new tree species with high dendrochronological characteristics in the tropical Andes, including the humid Puna of Peru. We present the first tree-ring chronology from Polylepis rodolfo-vasquezii, a recently described tree species in the Central Andes of Peru between 4000 and 4400 m elevation. Fifty trees were sampled in the district of Comas, Peru. After establishing the anatomical characteristics that delimit the annual growth rings, we developed a ring-width chronology by applying conventional dendrochronological techniques. The chronology covers the period 1869–2015 (157 years) and is well replicated from 1920 to present (> 20 samples). The statistics used to evaluate the quality of the chronology indicate that the P. rodolfo-vasquezii has similar values of MS, RBAR and EPS to those shown by other Polylepis spp chronologies. To determine the main climatic factors controlling the growth of P. rodolfo-vasquezii, we compared our chronology with local and regional temperature and precipitation records. Growth season temperature (November to May) seems to be the main climatic factor modulating inter-annual variations in the growth of this species. The sensitivity to inter-annual temperature variations highlights the potential of P. rodolfo-vasquezii to provide climatically sensitive dendrochronological records in the Central Andes. To our knowledge, this is the first tree-ring record in South America displaying significant relationships with temperature over the tropical Atlantic Ocean.

中文翻译：

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Polylepis rodolfo-vasquezii 的树木气候学评估：秘鲁高地的一种新型 Polylepis 物种

摘要 尽管树种种类繁多，但热带安第斯山脉的树木年代学记录非常稀少。因此，有必要在热带安第斯山脉，包括秘鲁潮湿的普纳地区，加大对树木年代学特征高的新树种的寻找。我们展示了 Polylepis rodolfo-vasquezii 的第一个年轮年表，这是一种最近描述的位于秘鲁中部安第斯山脉 4000 至 4400 米海拔的树种。在秘鲁的科马斯区对 50 棵树进行了采样。在确定划分年轮的解剖特征后，我们通过应用传统的树木年代学技术开发了年轮宽度年表。年表涵盖了 1869 年至 2015 年（157 年）期间，并且从 1920 年到现在（> 20 个样本）得到了很好的复制。用于评估年表质量的统计数据表明，P. rodolfo-vasquezii 的 MS、RBAR 和 EPS 值与其他 Polylepis spp 年表显示的值相似。为了确定控制 P. rodolfo-vasquezii 生长的主要气候因素，我们将我们的年表与当地和区域的温度和降水记录进行了比较。生长季节温度（11 月至 5 月）似乎是调节该物种生长年际变化的主要气候因素。对年际温度变化的敏感性突出了 P. rodolfo-vasquezii 在安第斯山脉中部提供气候敏感的树木年代学记录的潜力。据我们所知，