Reed bed management is one of the main wetland related issues in Europe and among the diverse approaches developed for that purpose, some restoration methods are considered rather intrusive. There is nonetheless a lack of research investigating how invertebrate communities react to such restoration methods. In this study, we assessed the suitability of reed bed soil strippings, also called bed lowerings, as habitats for aquatic beetles by sampling a total of 101 sites along the southern shore of Lake Neuchâtel, Switzerland. We compared water beetle species richness and taxonomic structure between reed bed soil strippings and other habitats found in the surrounding wetland. Additionally, we evaluated the promotion of new species through strippings and investigated the evolution of water beetle communities along the temporal gradient of reed bed soil strippings. No difference in species composition was found between the sampled habitats, suggesting a well-connected landscape mosaic within the study area. Managed sites did not increase species diversity at the landscape level. We identified a gradual diminution in species richness with age of restored site, as well as a shift in taxonomic assemblages. In conclusion, we advise reed bed soil strippings to be phased temporally and spatially, thus providing managed wetlands open water bodies of different successional stages.

中文翻译：

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芦苇土壤剥除作为湿地管理方法：对水甲虫的影响

芦苇床管理是欧洲与湿地有关的主要问题之一，在为此目的开发的多种方法中，某些恢复方法被认为是侵入性的。然而，缺乏研究无脊椎动物社区对这种恢复方法的反应的研究。在这项研究中，我们通过对瑞士纳沙泰尔湖南岸的101个地点进行采样，评估了芦苇床土壤剥离（也称为河床降落）作为水生甲虫栖息地的适用性。我们比较了芦苇床土壤剥落和周围湿地中其他栖息地之间的水甲虫物种丰富度和分类结构。另外，我们通过剥离评估了新物种的促进作用，并研究了沿芦苇床土壤剥离时间梯度的水甲虫群落的演变。在所采样的栖息地之间没有发现物种组成的差异，这表明研究区域内的景观马赛克连接良好。受管理的地点并没有增加景观一级的物种多样性。我们确定了物种丰富度随恢复地点的年龄而逐渐减少，以及生物分类组合的转变。总之，我们建议芦苇床土壤剥离在时间和空间上分阶段进行，从而为不同演替阶段的可管理湿地开放水体提供控制。受管理的地点并没有增加景观一级的物种多样性。我们确定了物种丰富度随恢复地点的年龄而逐渐减少，以及分类组合的转变。总之，我们建议芦苇床土壤剥离在时间和空间上分阶段进行，从而为不同演替阶段的可管理湿地开放水体提供控制。受管理的地点并没有增加景观一级的物种多样性。我们确定了物种丰富度随恢复地点的年龄而逐渐减少，以及生物分类组合的转变。总之，我们建议芦苇床土壤剥离在时间和空间上分阶段进行，从而为不同演替阶段的可管理湿地开放水体提供控制。