A comparison of trends and geographical variation in mammal abundance in the Breeding Bird Survey and the National Gamebag Census 2012
In the UK, monitoring schemes and surveys for mammals vary markedly in methodologies, and geographical and temporal extent among species, mainly due to the specialised protocols required to detect and identify most species. In this report, we compare results from two very different current annual monitoring schemes – the BTO/JNCC/RSPB Breeding Bird Survey (BBS) and the GWCT National Gamebag Census (NGC). Both schemes cover the entire UK, have been running for at least 15 years, and provide quantitative measures of abundance for multiple species, with considerable but not complete overlap in species coverage. This makes it possible to compare both temporal and geographic patterns of abundance and to explore possibilities for combining results across the two schemes.
Resource type Publication
Topic category Environment
Reference date 2012··
Noble, D.G., Aebischer, N.J., Newson, S.E., Ewald, J.A. & Dadam, D. 2012. A comparison of trends and geographical variation in mammal abundance in the Breeding Bird Survey and the National Gamebag Census. JNCC Report No. 468, JNCC, Peterborough, ISSN 0963-8091.
This report covers two annual monitoring schemes for mammals, each reporting on a suite of mammal species that overlap in scheme coverage and allow patterns of temporal and spatial change to be compared.
Communications, JNCC publisher
Limitations on public access No limitations
Use constraints Available under the Open Government Licence 3.0
Metadata date 2020·09·10
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