The bacterial energy channel: Protozoa-bacteria interrelationships as affected by root vicinity, organic matter and soil depth

细菌能量通道：原生动物与细菌之间的相互关系受根部距离、有机质和土壤深度的影响

• 批准号: 62031724
• 负责人: Professor Dr. Michael Bonkowski
• 金额: --
• 依托单位: Arbeitsgruppe IBG-2: Pflanzenwissenschaften
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/62031724?language=en
• 关键词: bacterial; energy; channel; Protozoa; bacteria

The project investigates the carbon (C) flux through the bacterial channel of the decomposer food web. The density and community structure of protozoa along two gradients of a maize field will be investigated: (1) from the rhizosphere to bulk soil and (2) from upper to deeper soil layers. Additionally a new field experiment will be set up to separate rhizosphere and detritusphere C inputs, and to identify herbivore links with the root energy channel. Laboratory experiments will be performed to identify trophic links and to quantify C fluxes in the microbial loop between bacteria and protozoan taxa in the rhizosphere and detritusphere and changes in link strength during detritus decomposition. Laboratory experiments will further identify herbivore links with the bacterial energy channel. It is hypothesized that protozoa are key-players in controlling the flux of C through bacteria in the rhizosphere, detritusphere, and particularly at deeper soil layers.

该项目研究了通过细菌通道分解食物网的碳(C)通量。研究了玉米田原生动物密度和群落结构的两个梯度：(1)从根际到块状土壤；(2)从表层到深层土壤。此外，还将建立一个新的田间试验，以分离根际和碎屑层的碳输入，并确定草食动物与根能量通道的联系。将进行实验室实验，以确定营养联系并量化根际和碎屑层中细菌和原生动物类群之间微生物环中的C通量以及碎屑分解过程中联系强度的变化。实验室实验将进一步确定草食动物与细菌能量通道的联系。据推测，原生动物是控制根际、腐肉层，特别是深层土壤中通过细菌的碳通量的关键角色。