Long‐term monitoring of forest tree communities is a basis for elucidating forest structure and dynamics and for evaluating ecosystem functions such as primary production. Because global climate change is changing forest ecosystems from the local to the global scale, it is essential to document long‐term monitoring data of forests to examine the temporal and geographical trends of forest changes. We report monitoring data of 45 forest plots (average area 0.69 ha; range 0.0325–6.25 ha) at 27 sites in Japan. These plots are situated within 32.38° N to 43.36° N and at elevations ranging from 8 to 2453 m above sea level. The forest plots include both old‐growth and secondary forests, and cover various forest biomes, such as warm‐temperate evergreen forests, temperate deciduous broadleaved forests, and boreal or sub‐alpine coniferous forests. In each plot, all living trees and lianas larger than a certain minimum size (typically 15 cm stem girth at breast height) were repeatedly measured and survival and recruitment of stems were recorded over 5–40 years (average 17.3 years). The data are presented in the format used by the Monitoring Sites 1000 Project in Japan (Ishihara et al. 2011, Ecological Research, 26, 1007–1008) and in the sample‐based Darwin Core format. This dataset expands existing open monitoring data for Japanese forests and thereby facilitates further meta‐analysis of forest community structures and changes in relation to climate change and other drivers. The complete data set for this abstract is available in electronic format in MetaCat in JaLTER at http://db.cger.nies.go.jp/JaLTER/metacat/metacat/ERDP-2024-03.1/jalter-en.

中文翻译：

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1980年至2021年日本列岛45个样地的森林监测数据

对森林树木群落的长期监测是阐明森林结构和动态以及评估初级生产等生态系统功能的基础。由于全球气候变化正在改变森林生态系统从局部到全球范围的变化，因此有必要记录森林的长期监测数据，以研究森林变化的时间和地理趋势。我们报告了日本 27 个地点的 45 个林地（平均面积 0.69 公顷；范围 0.0325-6.25 公顷）的监测数据。这些地块位于北纬 32.38° 至 43.36° 范围内，海拔范围为海拔 8 至 2453 米。林地包括原生林和次生林，覆盖各种森林生物群落，如暖温带常绿森林、温带落叶阔叶林、寒带或亚高山针叶林。在每块地块中，所有大于特定最小尺寸（通常茎胸围为 15 厘米）的活树木和藤本植物都经过重复测量，并记录了 5-40 年（平均 17.3 年）的存活和茎补充情况。数据以日本监测点 1000 项目使用的格式呈现（Ishihara 等人，2011 年，生态研究,26，1007–1008）以及基于样本的 Darwin Core 格式。该数据集扩展了日本森林现有的开放监测数据，从而有助于对森林群落结构以及与气候变化和其他驱动因素相关的变化进行进一步的荟萃分析。本摘要的完整数据集可在 JaLTER 的 MetaCat 中以电子格式获取，网址为：http://db.cger.nies.go.jp/JaLTER/metacat/metacat/ERDP-2024-03.1/jalter-en。