在陆地生态系统中，细菌、真菌及无脊椎动物组成分解的主要驱动力。真菌和无脊椎动物是物种丰富的倒木上定殖的主要真核生物分类群。倒木和土壤之间的生物物种交换及作用对森林养分循环具有重要意义。然而，到目前为止，很少有对土壤和倒木分解生物群落之间相互联系及其动态变化的研究。那么，倒木分解变化的主要生物驱动力是自身生物还是土壤生物呢？其对环境变化的响应又如何？目前都还不太清楚。本项目拟以地处中亚热带的江西庐山国家级自然保护区为试验点，采用DNA法、OTUs法、微孔膜袋法和Pitfall trap分析倒木分解真菌、无脊椎动物与土壤真菌、无脊椎动物的组成变化和相互关系及其对UV-B和N沉降变化的响应。揭示倒木分解、土壤、真菌及无脊椎动物之间的内在关联性及其对全球气候变化的响应，以阐明中亚热带湿润气候条件下倒木分解生物驱动力及其在未来全球气候条件下的变化趋势。

In terrestrial ecosystems, bacteria, fungi and invertebrates are the main drivers of decomposition. Fungi and invertebrates are the main eukaryotic taxa colonized on coarse woody debris (CWD) with abundant biotic species. Biotic species exchange and interaction between CWD and soil plays an important role in forest nutrient cycling. To our knowledge, however, a little of studies have examined the biotic communities and their dynamic changes between soil and CWD. The main biotic driving force of CWD decomposition was self-biotic or soil biotic? And its response to global climate change are still unclear. We conducted a field-based experiment to investigate the composition dynamics and relationship of fungi and invertebrates between CWD and soil during CWD decomposition process which using 1-mm-mesh net, Pitfall trap, DNA and OTUs method to collected and analysis in the middle subtropical Jiangxi Lushan National Nature Reserve. Meanwhile, we also determined the response of biotic driving force of CWD decomposition to global climate change, including increasing UV-B and N deposition. Our objectives are to understand the intrinsic correlation among CWD decomposition, soil, fungi and invertebrate, and their response to global climate change. Our ultimate goal is to clarify the biotic driving forces of CWD decomposition and its changing trends under future global climate change in subtropical Chinese forests.