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Llyn Brianne is an upland reservoir in the headwaters of the River Towy in central Wales. The streams feeding the reservoir vary in geology, acidification and catchment land use. The Llyn Brianne Observatory includes 14 perennial streams draining individual catchments of 15 to 264 ha (215-410m altitude). These streams enable good research design with replicates of each stream type.
Upland stream mesocosms
In 2014, with funding from the Natural Environment Research Council (NERC), bespoke artificial channels were installed on four contrasting Llyn Brianne streams. These cascading channels are a world class facility enabling detailed hydrochemical monitoring and a range of experimental work. The channels are representative of steep, turbulent, oligotrophic systems that support a distinct diversity of upland stream biota.
These channels have been used to research:
- the role of organisms in controlling organic carbon flux as part of the DURESS project
- the effects of physical and chemical drivers on the loss of eDNA
- the impact of extreme drought on stream invertebrates.