Zudin Sergey, Heintz Wilfried, Kraus Daniel, Krumm Frank, Larrieu Laurent, Schuck Andreas
European Forest Institute, Joensuu, Finland European Forest Institute Joensuu Finland.
INRAE, UMR Dynafor, Castanet-Tolosan, France INRAE, UMR Dynafor Castanet-Tolosan France.
Biodivers Data J. 2022 Oct 12;10:e91385. doi: 10.3897/BDJ.10.e91385. eCollection 2022.
Tree to tree interactions are important structuring mechanisms for forest community dynamics. Forest management takes advantage of competition effects on tree growth by removing or retaining trees to achieve management goals. Both competition and silviculture have, thus, a strong effect on density and distribution of tree related microhabitats which are key features for forest taxa at the stand scale. In particular, spatially-explicit data to understand patterns and mechanisms of tree-related microhabitats formation in forest stands are rare. To train and eventually improve decision-making capacities related to the integration of biodiversity aspects into forest management plot of one hectare, so called marteloscopes were established in the frame of the 'European Integrate Network'. In each plot, a set of data is collected at the individual tree level and stored in a database, the 'I+ repository'. The 'I+ repository' is a centralised online database which serves for maintaining the data of all marteloscope plots. A subset of this repository was made publicly available via the Global Biodiversity Information Facility, based on a data-sharing policy. Data included are tree location in plot, tree species, forest mensuration data (diameter at breast height [cm], tree height [m]), tree status (living or standing dead) and tree-related microhabitats. Further, a visual assessment of timber quality classes is performed in order to provide an estimate of the economic value (market price) for each tree. This information is not part of the GBIF dataset.
Currently 42,078 individual tree observations from 111 plots are made available via the Global Biodiversity Information Facility (GBIF). As the network of plots continues to expand, so does the database of tree-related microhabitats. Therefore, the database will undergo a regular update. The current version has a temporal coverage from March 2014 to December 2020. The innovation of this unique dataset is that it is based on a commonly agreed catalogue of tree microhabitats as a field reference list when assessing assessment protocol. The reference list is available in 17 languages and, thus, helps to guarantee compatibility of tree-related microhabitat assessments across countries and plots.
树木之间的相互作用是森林群落动态的重要结构机制。森林管理通过移除或保留树木来利用竞争对树木生长的影响，以实现管理目标。因此，竞争和造林对与树木相关的微生境的密度和分布都有强烈影响，而这些微生境是林分尺度上森林分类群的关键特征。特别是，用于理解林分中与树木相关的微生境形成模式和机制的空间明确数据很少。为了培训并最终提高将生物多样性方面纳入一公顷森林经营地块管理的决策能力，在“欧洲综合网络”框架内建立了所谓的“marteloscopes”。在每个地块中，在单株树木水平上收集一组数据并存储在一个数据库“ I +存储库”中。“ I +存储库”是一个集中式在线数据库，用于维护所有marteloscope地块的数据。根据数据共享政策，该存储库的一个子集通过全球生物多样性信息设施公开提供。包含的数据有地块中树木的位置、树种、森林测量数据（胸径[厘米]、树高[米]）、树木状态（活树或枯立木）以及与树木相关的微生境。此外，还对木材质量等级进行视觉评估，以便估算每棵树的经济价值（市场价格）。此信息不属于GBIF数据集。
目前，通过全球生物多样性信息设施（GBIF）提供了来自111个地块的42,078个单株树木观测数据。随着地块网络的不断扩大，与树木相关的微生境数据库也在不断扩大。因此，该数据库将定期更新。当前版本的时间范围是2014年3月至2020年12月。这个独特数据集的创新之处在于，在评估协议时，它基于一个普遍认可的树木微生境目录作为现场参考清单。该参考清单有17种语言版本，因此有助于保证各国和各地块之间与树木相关的微生境评估的兼容性。
