Response of soil fauna to land use intensification in a global meta-analysis

全球荟萃分析中土壤动物对土地利用集约化的响应

• 批准号: 467340266
• 负责人: Dr. Bibiana Betancur Corredor, Ph.D.
• 金额: --
• 依托单位: Zentrum für Entwicklungsforschung (ZEF)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/467340266?language=en
• 关键词: Response; soil; fauna; land; use

Land use intensification, particularly a shift from extensively (low-input) to intensively (high-input) managed agroecosystems is often seen as one of the main drivers of global biodiversity decline and is considered the main factor applying pressure on soil biodiversity. When confronted with future land use change, understanding the responses of soil biodiversity to different land use regimes of varying intensity is decisive for adequate land management. However, there is still substantial uncertainty about how consistently different taxonomic groups respond to land use intensification. The main objective of this project is to systematically assess and quantify through network meta-analysis the effects of land-use intensification on soil organisms in global agroecosystems, and to analyze the dependence of these effects on abiotic factors such as soil properties (organic matter, pH, nutrient and water availability, texture), climatic variables and land use history. A global meta-analysis will help to understand whether certain taxonomic or functional groups of organisms are more affected by land use intensification, or whether organisms inhabiting areas with a longer history of land use show similar responses to those living in areas with shorter history. The dependance of the effects (size and direction) of land use intensification on soil organisms on the type of intensification studied, climate, and soil properties (pH, N, texture, organic matter) can also be quantified through a global meta-analysis. A network meta-analysis is especially appropriate for this purpose as it exploits all available direct and indirect evidence, and eliminates the need to have a common reference land use in all studies as occurs with traditional meta-analyses based on pairwise comparisons (i.e. intervention: arable vs. reference: undisturbed ecosystems, intervention: pasture vs. reference: undisturbed ecosystems). This allows to include more studies for analysis, that compare the effects of at least two land use regimes of different intensity on soil organisms (i.e. intervention: arable vs reference: pasture; intervention: pasture vs reference: undisturbed ecosystems).

土地利用集约化，特别是从粗放（低投入）管理转向集约（高投入）管理的农业生态系统，往往被视为全球生物多样性下降的主要驱动因素之一，并被认为是对土壤生物多样性施加压力的主要因素。面对未来的土地利用变化，了解土壤生物多样性对不同强度的土地利用制度的反应是适当的土地管理的决定性因素。然而，仍然有很大的不确定性，如何一贯不同的分类群体对土地利用集约化的反应。该项目的主要目标是通过网络元分析系统地评估和量化土地利用集约化对全球农业生态系统中土壤生物的影响，并分析这些影响对非生物因素的依赖性，如土壤特性（有机质、pH值、养分和水的可用性、质地）、气候变量和土地利用历史。全球元分析将有助于了解生物体的某些分类或功能群体是否更受土地利用集约化的影响，或者居住在土地利用历史较长地区的生物体是否与生活在历史较短地区的生物体表现出类似的反应。土地利用集约化对土壤生物的影响（大小和方向）对所研究的集约化类型、气候和土壤特性（pH值、氮、质地、有机质）的依赖性也可以通过全球荟萃分析来量化。网络元分析特别适合于这一目的，因为它利用了所有可用的直接和间接证据，并消除了在所有研究中使用共同参考土地使用的需要，而传统的元分析基于成对比较（即干预：耕地与参考：未受干扰的生态系统，干预：牧场与参考：未受干扰的生态系统）。这使得可以纳入更多的研究进行分析，比较至少两种不同强度的土地利用制度对土壤生物的影响（即干预：耕地与参考：牧场;干预：牧场与参考：未受干扰的生态系统）。