Links and fluxes in forest soil micro-food webs under different land use intensity

不同土地利用强度下森林土壤微食物网的联系和通量

• 批准号: 252130838
• 负责人: Professorin Dr. Liliane Rueß
• 金额: --
• 依托单位: Arbeitsgruppe Ökologie
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/252130838?language=en
• 关键词: Links; fluxes; forest; soil; micro

Their great abundance, coupled with high species and trophic diversity, make nematode a key group in soil food webs. The proposed project investigates land use effects on the nematode fauna in 75 forest plots of the three exploratories with the focus on: (1) structure and function of the micro-food web, (2) links between microbial and faunal food web, and (3) biodiversity assembly after disturbance. By application of the nematode faunal analysis concept nematodes are used as indicators for food web conditions to assign how land use and forest management, and the related changes in food web resources, affect decomposition pathways and energy flux in soil. Community level physiological profiling (CLPP) of lipids is employed to monitor changes in trophic diversity at a biochemical level and to assess the strength of linkage between the microbial and faunal food web. To the best of our knowledge this is the first attempt of CLPP in nematode field populations. Further, re-establishment of the micro-food web after disturbance gives insight how the maintenance of functional diversity is shaped by habitat (land use type), resource (litter type) and biotic interactions (e.g. competition). The work is carried out in cooperation with projects of U. Brose, N. Eisenhauer, M. Maraun and S. Scheu, and complements the faunal analysis with the key group nematodes. Overall, nematodes will serve as entry-level indicators for resource allocation, partitioning and transfer in the micro-food web as modulated by forest land use intensity.

它们的丰富性，加上物种和营养多样性，使线虫成为土壤食物网中的一个关键群体。本研究拟在三个研究站的75个森林样地调查土地利用对线虫区系的影响，重点是：（1）微食物网的结构和功能，（2）微生物和动物食物网之间的联系，（3）干扰后的生物多样性聚集。通过应用线虫区系分析概念，线虫被用作食物网条件的指标，以确定土地利用和森林管理以及食物网资源的相关变化如何影响土壤中的分解途径和能量通量。群落水平的生理分析（CLPP）的脂质监测营养多样性的变化，在生物化学水平，并评估微生物和动物的食物网之间的联系的强度。据我们所知，这是CLPP在线虫田间种群中的首次尝试。此外，重新建立的微食物网干扰后，洞察功能多样性的维护是如何形成的栖息地（土地利用类型），资源（垃圾类型）和生物相互作用（例如竞争）。这项工作是与美国的项目合作进行的。Brose，N. Eisenhauer，M. Maraun和S. Scheu，并补充了与关键组线虫的区系分析。总的来说，线虫将作为初级指标，用于根据森林土地利用强度调整的微型食物网中的资源分配、划分和转移。