Towards a rapid assessment of multifunctionality and multidiversity in tree biodiversity experiments using coarse woody debris as model system

以粗木质碎片为模型系统快速评估树木生物多样性实验的多功能性和多样性

• 批准号: 192850744
• 负责人: Professor Dr. Christian Wirth
• 金额: --
• 依托单位: Institute of Ecology
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/192850744?language=en
• 关键词: Towards; rapid; assessment; multifunctionality; multidiversity

Coarse woody debris (CWD) is an important component of forest ecosystems throughout the world. It represents a significant carbon and nutrient pool, promotes biodiversity of wood-dwelling organisms, influences erosion and serves as a fuel for wildfire. Little is known about CWD dynamics in species-rich subtropical forests and hardly anything is known about the role of tree diversity. Biodiversity may affect decomposition rates and stocks of CWD by altering the decomposer microenvironment (via the link between diversity and stand structure), the substrate quality (via tree species’ traits) and the diversity and abundance of saproxylic insects. To explore the signature of tree diversity on CWD decomposition we propose a combination of field observations and experiments: (1) We follow the fate of labeled in situ CWD originating from a recent snowbreak. (2) Standardized CWD varying in accessibility for microbes and insects (litter bags, elevated position) will be deposited in the comparative study plots, in the main experiment and in the NILEx experiment, to disentangle the roles of tree diversity, stand structure, and abiotic factors. (3) The relationship between CWD decomposition and wood traits is investigated using material from 20 tree species. The experiments will be closely integrated with the other subprojects on C and N dynamics and insect diversity. With this project we expect to uncover a novel pathway of how diversity affects ecosystem functioning in forests.

粗木质残体是森林生态系统的重要组成部分。它是一个重要的碳和营养库，促进了木居生物的生物多样性，影响了侵蚀，并成为野火的燃料。对物种丰富的亚热带森林中CWD动态知之甚少，对树木多样性的作用几乎一无所知。生物多样性可通过改变分解者微环境（通过多样性与林分结构之间的联系）、基质质量（通过树种的特性）以及腐食昆虫的多样性和丰度，影响化学耗氧量的分解速度和储存量。为了探索树木多样性对CWD分解的影响，我们提出了一个野外观察和实验相结合的方法：（1）我们跟踪了最近一次降雪后原位标记的CWD的命运。(2)标准化的CWD不同的微生物和昆虫的可及性（垃圾袋，升高的位置）将存放在比较研究地块，在主要实验和NILEx实验，解开树木多样性，林分结构和非生物因素的作用。(3)以20个树种为试材，研究了木材CWD分解与木材性状的关系。这些实验将与关于碳和氮动态和昆虫多样性的其他分项目密切结合。通过这个项目，我们希望发现一种新的途径，了解多样性如何影响森林生态系统的功能。