Service Description: This is a subset of the European Barrier Atlas generated as part of the EU-funded AMBER project. Barrier data were compiled from existing databases and were ground truthed by field surveys in England, Scotland and Wales.
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Description: This is a subset of the
European Barrier Atlas, generated as part of the EU-funded AMBER project. This project seeks to apply adaptive management to the operation of dams and barriers in European rivers to achieve a more efficient restoration of stream connectivity and address impacts caused by river fragmentation.
Abstract: Artificial barriers are one of the main threats to river ecosystems, resulting in habitat fragmentation and loss of connectivity. Yet, the abundance and distribution of most artificial barriers, excluding high head dams, is poorly documented. We provide a global assessment of the distribution and typology of artificial barriers in Great Britain, and estimate for the first time the extent of river fragmentation. To this end, barrier data were compiled from existing databases and were ground truthed by field surveys in England, Scotland and Wales to derive a correction factor for barrier density across Great Britain. Field surveys indicate that existing barrier databases underestimate barrier density by 68%, particularly in the case of low-head structures (<1 m) which are often missing from current records. Field-corrected barrier density estimates ranged from 0.48 barriers/km in Scotland to 0.63 barriers/km in Wales, and 0.75 barriers/km in England. Corresponding estimates of stream fragmentation, measured as mean barrier-free length, were 12.30 km in Scotland, 6.68 km in Wales and 5.29 km in England, reflecting different anthropogenic pressures. Our study indicates that 97% of the river network in Great Britain is fragmented and none of the rivers are free of artificial barriers.
Copyright Text: Jones, Joshua (2019), “Barrier database (AMBER-GB) for: A Global Assessment of Stream Fragmentation in Great Britain”, Mendeley Data, v1 http://dx.doi.org/10.17632/trsrvw4swg.1
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