SYKE: Jukka Aroviita, Jarno Turunen, Virpi Lehtoranta, Sari Väisänen, Tiina Laamanen Oulun yliopisto: Timo Muotka, Björn Klöve, Hannu Marttila, Pauliina Louhi Metsähallitus: Pirkko-Liisa Luhta, Eero Moilanen, Eero Hartikainen, Matti Suanto How to restore headwater streams in a eco-hydro-sociologically sustainable way? Forest drainage impairs stream ecosystems via excessive sedimentation degrading ecological status and natural functions. Visible restoration benefits help in setting restoration targets and creating effective plans with strong public and stakeholder support. Aquatic mosses are key to recovery of boreal stream biodiversity. Sedimentation may cause trophic cascade by obscuring the predation effects on ecosystem functions. Restoration structures enhance stream biodiversity but responses are taxon-specific and slow to emerge. This poster highlights work from ReFFECT-project (Effectiveness of restoration of sediment-stressed forest streams - Ecology meets hydrology) funded by Academy of Finland in 2012–2016. The research is an ongoing joint effort by ecologists, hydrologists and socioeconomists establishing mechanistic linkages between anthropogenic impacts in streams and their hydrological and biological responses in a societal context. In-stream restoration that increases hydraulic retention has positive biodiversity effects extending beyond stream channel.
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