Interrelation between pesticide inputs, hydromorphology and source populations influencing the recolonization of benthic invertebrate communities

农药投入、水形态和源种群之间的相互关系影响底栖无脊椎动物群落的再殖民

• 批准号: 109219305
• 负责人: Professor Dr. Werner Brack
• 金额: --
• 依托单位: Department Wirkungsorientierte Analytik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/109219305?language=en
• 关键词: Interrelation; between; pesticide; inputs; hydromorphology

The restoration of natural hydromorphological conditions of stream sections aims to improve the riverine fauna. Yet, several of these restoration measures failed to rehabilitate the expected near-natural communities. At the same time, several pesticides are frequently detected in German surface waters that may limit the recolonisation of sensitive, habitat-demanding benthic invertebrate species. This proposal aims to develop two stressor-specific indicators to distinguish between the impacts of pesticide inputs and morphological degradation on macroinvertebrate communities. For this purpose, pesticide concentrations from an ongoing monitoring program will be converted to a measure of toxic stress and used together with effective hydromorphological parameters to derive a 'stressor profile' of sites. Concurrently we will consider the recovery potential of the landscape, taking source populations into account. To transfer the results to sites where no pesticide measurements are available, a GIS-based surface runoff model will be applied to estimate the magnitude of pesticide inputs. Finally, a spatially-explicit 'recolonization potential' model, which will be validated by field investigations, will allow to identify the driving forces affecting the current distribution and potential recolonisation of benthic invertebrate species.

恢复河流断面的自然水文形态条件是改善河流动物区系的重要途径。然而，其中一些恢复措施未能恢复预期的近自然社区。与此同时，在德国地表沃茨中经常检测到几种农药，这可能会限制敏感的、要求栖息地的底栖无脊椎动物物种的繁殖。本建议旨在制定两个压力具体指标，区分农药投入和形态退化对大型无脊椎动物群落的影响。为此目的，农药浓度从一个正在进行的监测计划将被转换为一个衡量的毒性压力和使用有效的水文形态参数一起，以获得一个'压力配置文件'的网站。同时，我们将考虑景观的恢复潜力，考虑到源种群。为了将结果转移到没有农药测量数据的地点，将采用基于GIS的地表径流模型来估计农药投入的大小。最后，一个空间上明确的"潜在的“模型，这将通过实地调查进行验证，将允许确定驱动力影响目前的分布和潜在的底栖无脊椎动物物种。