Aridity threatens the sexual regeneration of Quercus ilex

In 2023, I noticed an error in the metadata of the 'recruitment' file and also the lack of a column with information about the availability of space on each plot. This information has been included in a new file, called 'recruitment_v2' with the corrected information in yellow and the new information in green..This dataset is the result of a field campaign that lasted from spring to autumn 2017, to collect information on all Quercus ilex recruits from the last 50 years that remain alive in plots of 17, 5.3 ha in the Iberian System (eastern Spain) and where we collected 177 of these recruits to establish relationships between the age of the plants from the growth ring count and the diameter of the root collar of the same plants measured in the field.<br>We produced two databases. One of them ("recruitment") includes information on the sample plots: climate, intensity of deforestation, soil depth, cover of Quercus ilex and the potential nurse plants present and presence of domestic and wild herbivores, as well as information on all the recruits found and on other complementary points where there were no recruits: age of the recruit determined from the "diameter_age" database -see below- and the presence and identity of potential species that could act as plants within 50 cm around the sampling point.The other database ("age_diameter") is the data generated with the information on the plants from which the growth rings were counted and which were used to estimate the age of all the Quercus ilex recruits found in the plots and of which we measured the diameter of the root collar2023年，笔者发现"recruitment"文件的元数据存在错误，且缺失了记录每块样地空间可用情况的列。相关信息已补充至新文件"recruitment_v2"中，其中修正后的信息以黄色标注，新增信息以绿色标注。 本数据集源于2017年春季至秋季开展的野外调查工作，旨在收集伊比利亚山脉（西班牙东部）内17块面积为5.3公顷样地中，近50年间存活的冬青栎（Quercus ilex）幼苗更新数据。本次调查共采集177株冬青栎幼苗样本，通过计数生长轮确定植株年龄，并测量同期野外采集的该类植株根颈直径，以建立植株年龄与根颈直径之间的关联关系。 研究团队共构建了两个数据库。其一为"recruitment"数据库，包含样地相关信息：气候、森林砍伐强度、土壤厚度、冬青栎盖度、现存潜在庇护植物种类，以及家养和野生草食动物的出没情况；同时收录所有被发现的冬青栎幼苗信息，以及无幼苗分布的辅助采样点信息：通过"diameter_age"数据库（详见下文）确定的幼苗年龄，以及采样点周边50厘米范围内可作为庇护植物的潜在物种种类与存在情况。 其二为"age_diameter"数据库，其数据源自经生长轮计数确定年龄的植株样本，用于估算所有样地内发现的冬青栎幼苗的年龄，且已测量该类植株的根颈直径。