Tree growth response to drought partially explains regional-scale growth and mortality patterns in Iberian forests

To quantify responses to drought from different data sources we take advantage of an extensive network of cross-dated tree-ring data with increment cores from 16 tree species sampled across the Spanish Iberian Peninsula (hereafter abbreviated as RWI-net), and of the Spanish National Forest Inventory (hereafter abbreviated as NFI) sampling tree and plot level data each km in forested areas. We selected the five most severe droughts that have affected each selected RWI-net population in the period 1981-2005 and calculated drought impacts on growth. For each site, we calculated drought-induced cumulative growth reductions (CDI, cumulative drought impact) as the summed impact of the selected droughts on growth of each population. A total of 334 RWI-net sites with chronologies that covered the period 1981-2005 for the 16 species, were finally used. For 192 of these RWI-net sites, 1883 NFI plots were found at distances < 10 km. The tables provided contain information on the sites and tree..., , ,为量化不同数据源对干旱的响应，本研究依托两套核心数据集：一套是覆盖西班牙伊比利亚半岛、涵盖16个树种且包含生长芯样的交叉定年树轮数据网络（以下简称RWI-net）；另一套为西班牙国家森林调查（Spanish National Forest Inventory，以下简称NFI），该调查在林区以每平方公里1个样点的尺度采集树木及样地水平的调查数据。研究选取了1981-2005年间对每个选定的RWI-net研究种群造成最严重影响的5次干旱事件，并计算了干旱对树木生长的影响。针对每个样地，研究人员以所选干旱事件对各研究种群生长的总影响之和为指标，计算得到干旱诱导累计生长缩减量（CDI，cumulative drought impact）。最终共纳入334个RWI-net样地，这些样地的树轮年表覆盖1981-2005年时段且涵盖全部16个树种。其中192个RWI-net样地周边10公里范围内，共匹配到1883个NFI调查样地。本次提供的数据集表格包含样地与树木相关信息……