The nematode-based food-chain of a temperate deciduous forest

温带落叶林的线虫食物链

• 批准号: 85010410
• 负责人: Professor Dr. Mark Maraun
• 金额: --
• 依托单位: Arbeitsgruppe Ökologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/85010410?language=en
• 关键词: nematode; based; food; chain; temperate

It is well known from laboratory no-choice studies that oribatid mites and collembolans feed on nema-todes. Here we investigate if this has relevance in the field. In the first phase of this ongoing DFG project we established species-specific primers (~ 200 bp of the COI region) for three nematode species, which were consumed by soil microarthropods (oribatid mites, mesostigmate mites, collembolans) when offered as diet in the laboratory. Using these primers we could prove this trophic link under field conditions and moreover were able to distinguish between consumption of living and dead prey. In the last year of the project we intend to (1) investigate how long DNA of three nematode prey species can be detected in the gut of predators and hence serve as trophic marker, and (2) test for nematode prey in the guts of different soil microarthropod species collected in the field. Ultimately, we aim at a better understanding of nematode-based food-chains of temperate deciduous forest.

实验室无选择研究表明甲螨和弹尾虫以线虫为食。在这里，我们调查，如果这在该领域的相关性。在这个正在进行的DFG项目的第一阶段，我们建立了物种特异性引物（~ 200 bp的COI区域）的三种线虫，这是消耗土壤微型节肢动物（甲螨，中气门螨，弹尾虫）时，在实验室中提供的饮食。使用这些引物，我们可以证明在野外条件下的营养联系，而且能够区分消费的活的和死的猎物。在项目的最后一年，我们打算（1）调查三种线虫猎物物种的DNA在捕食者肠道中的长度，从而作为营养标记，以及（2）测试在野外收集的不同土壤微型节肢动物物种的肠道中的线虫猎物。最终，我们的目标是更好地了解温带落叶林线虫为基础的食物链。

项目成果

Nematode consumption by mite communities varies in different forest microhabitats as indicated by molecular gut content analysis

• DOI: 10.1007/s10493-014-9807-x
• 发表时间: 2014-09-01
• 期刊: EXPERIMENTAL AND APPLIED ACAROLOGY
• 影响因子: 2.2
• 作者: Heidemann, Kerstin;Ruess, Liliane;Maraun, Mark
• 通讯作者: Maraun, Mark