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Restoration and constructed wetlands

Restoration is one of the most common tools applied to achieve good ecological status in streams, lakes and marine areas as required by the Water Framework Directive. The restoration measures can be targeted to, for instance, water quality, carbon storage, the habitat conditions of the streams and processes in the ecotone between land and water. Lately, a number of wetlands have been recreated to improve water quality and the habitat conditions of streams are improved by remeandering and deposition of coarse substrate. In particular, lowland streams are suffering from severe habitat degradation due to hydromorphological changes and dredging/weed cutting, and in many places there is a need for application of restoration measures to achieve good ecological status. Our sections examines the effects of restoration of stream ecosystems and various restoration measures on ecosystem structure and function.

Ongoing projects within this topic

Restoring biodiversity in streams: Strategy and method selection

Strategy and method selection
2017-2020. This project evaluates the effects of restoration measures in streams, partly through existing data and partly through the collection of new data in field studies. The main focus of the project is rare species and species in decline, examining the extent to which current restoration methods create the necessary habitats for the rare species and the extent to which a successful re-migration is taking place in the restored stretches. The field work includes release of rare species in selected streams and follow-up on their survival after release. The project is financed by the Aage V. Jensen Foundation.

Mapping, restoration and management of groundwater-fed bogs and springs

2017-2020. This project explores the relationship between environment, management and biodiversity in an evidence-based management of groundwater-fed habitat types such as fens and springs in sheltered stream valleys in Himmerland and Kronjylland. The aim of the project is to develop methods for bio-hydrological mapping of groundwater-dependent nature as well as testing and investigating tools for restoration (of natural hydrology, vegetation and derived biodiversity), including various forms of land management (grazing models, hay harvest, fire and natural succession). The final part of the project will partly include an examination of previously completed restoration and recovery projects in cooperation with the municipalities involved and experimental manipulation of disturbance regimes in several selected areas in the stream valley Kastbjerg Ådal in Himmerland. The project is carried out in collaboration with the Section for Biodiversity (AU, Bioscience) and the private companies WatsonC and Niras. The project is financed by the Aage V. Jensen Foundation.