Temporal dynamics of tree diversity effects on growth, mortality and biomass production (BIOTREE project)

树木多样性对生长、死亡率和生物量生产影响的时间动态（BIOTREE 项目）

• 批准号: 439223434
• 负责人: Professor Dr. Michael Scherer-Lorenzen
• 金额: --
• 依托单位: Abteilung Geobotanik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/439223434?language=en
• 关键词: Temporal; dynamics; tree; diversity; effects

Biodiversity is increasingly recognized as a key component of ecosystems that directly influences many ecological processes and functions. The largest fraction of biodiversity-ecosystem functioning research still comes from fast-growing and small-statured model systems such as grasslands. However, more recently scientists have started to study the effects of changing tree diversity in complex woody systems. In doing so, several tree diversity experiments have been established within the last 20 years, forming now a global network of such experiments. Here, I propose to analyse the significance of tree diversity for growth, mortality and biomass production in some of the oldest tree diversity experiments (BIOTREE), located in Thuringia, Germany. The BIOTREE project encompasses four different experiments at three sites, where new tree stands differing in tree diversity have been planted adopting different designs. In two experiments, gradients of tree species richness have been established. In a third experiment, differences in functional diversity have been created while keeping the number of species per plot constant. In a fourth experiment, species evenness and planting density have been manipulated. In total, more than 200,000 trees have been planted. I suggest to extend existing time series of tree growth and mortality assessments with a new measurement campaign 16 years after planting. The central aim is to investigate and quantify temporal scale dependencies of tree diversity effects on tree growth, mortality and biomass production. In addition, drone-based tree height measurements will be tested for the use in dense tree stands. This project will provide first long-term data on the tree diversity-productivity relationship, thus contributing to forest biodiversity-ecosystem functioning research.

生物多样性越来越多地被认为是直接影响许多生态过程和功能的生态系统的关键组成部分。生物多样性生态系统功能研究的最大一部分仍然来自生长快的小型模型系统，例如草原。但是，最近科学家已经开始研究复杂木质系统中改变树木多样性的影响。在此过程中，过去20年中已经建立了几个树木多样性实验，现在形成了这样一种实验的全球网络。在这里，我建议分析树木多样性对位于德国图林林雅的一些最古老的树木多样性实验（Biotree）中生长，死亡率和生物量产生的重要性。 Biotree项目包括在三个地点进行的四个不同的实验，在该地点，新的树木在树上的多样性中已经种植，采用了不同的设计。在两个实验中，已经建立了树种丰富度的梯度。在第三个实验中，在保持每个图恒定物种数量的同时，已经产生了功能多样性的差异。 在第四个实验中，已经操纵了物种均匀度和种植密度。总共种植了200,000多棵树。我建议通过种植16年后的新测量运动来延长现有的树木生长和死亡率评估。中心目的是调查和量化树木多样性对树木生长，死亡率和生物量产生的影响的时间尺度依赖性。此外，将测试基于无人机的树高度测量值，以便在密集的树木架上使用。该项目将提供有关树木多样性生产率关系的第一长期数据，从而有助于森林生物多样性生物系统功能研究。