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JNCC Pressure Mapping Methodology - Physical damage (Reversible Change) - Habitat structure changes - removal of substratum (extraction) 2016


The aim of this report is to recommend a method for the creation of a standard UK-wide geo-data layer using available data (currently from 2006-2015) to map the extent and spatial distribution of extraction on the seafloor from human activity.


The production of the extraction geo-data layer from human activities datasets is based upon a range of assumptions and as such has a number of associated limitations. The method recommended within this report is specifically designed for use within UK-wide and regional pressure assessments, rather than smaller-scale MPA assessments. Activities datasets are often subject to licence fees and data-sharing restrictions. As such, for navigational dredging, freely-available licence area data were used rather than actual area of the activity. These data also do not include intensity information (hours dredged).

Resource type Publication

Topic category Environment

Reference date 2016·12·01

Peckett, F.J., Eassom, A., Church, N.J., Johnson, G.E. & Robson, L.M. 2016. JNCC Pressure Mapping Methodology. Physical damage (Reversible Change) - Habitat structure changes - removal of substratum (extraction). JNCC Report No. 601, JNCC, Peterborough, ISSN 0963-8091.

It is hoped that this method might be adopted as a common approach to aid comparison between studies in the future. Updates with more recent data can, and should, be made as and when new datasets become available.

Responsible organisation
Digital and Data Solutions, JNCC publisher

Limitations on public access No limitations

Use constraints Available under the Open Government Licence 3.0

Metadata date 2019·07·10

Metadata point of contact
Digital and Data Solutions, JNCC

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