The effect of different natural habitats (macrophyte dominated versus macrophyte free broaches) on the immobilisation of dissolved organic carbon in river biofilms

生物膜是许多水生生态系统中微生物的主要形式，在河流中尤其重要，因为它们控制着相关的生态系统过程。例如，它们吸收和储存碳的能力表明，它们在河流的碳循环中发挥着关键作用。然而，各种栖息地特性对生物膜结构和功能的影响-影响其溶解有机碳（DOC）处理能力-的知识仍然模糊。在这里，我提出了第一项研究，涉及的性质，水生植物作为一个主要的决定因素，在河流中的生物膜的架构，结构和功能，即DOC固定。在这种情况下，生物膜起源于水生植物占主导地位的生物膜将比较与无水生植物河段沿着的过程中的波德河（萨克森-安哈尔特，德国）。为此，计划将实地研究和实验室规模的实验结合起来。预期的结果将允许声明河流生物膜的碳循环的作用，在河流中，加上不同的栖息地属性。

Biofilms, which are now recognized as the dominant form of microbial life in many aquatic ecosystems, are particularly important in rivers where they govern relevant ecosystem processes. For instance, their ability to take up and store carbon indicates a key role for carbon cycling in rivers. Nevertheless, the knowledge on the impact of various habitat properties on biofilm structure and function - affecting their dissolved organic carbon (DOC) processing capacities - remains obscure. Here, I propose a first study that relates the properties of macrophytes as a major determinant in rivers to biofilm architecture, structure and function, i.e. DOC immobilisation. In this context, biofilms originated from macrophyte dominated will be compared with biofilms from macrophyte free reaches along the course of the river Bode (Saxony-Anhalt, Germany). For this purpose a combination of field studies and experiments in the laboratory scale are planned. The expected results will allow statements about the role of river biofilms on the carbon-cycle in rivers as coupled to different habitat properties.