4f4c4942-4343-5764-6473-313231313231 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2025-12-24T09:30:16.073Z NRW 1.0 wel British National Grid (EPSG::27700) The status and distribution of the ground beetle Harpalus melancholicus at Stackpole Warren in 2017 The status and distribution of the ground beetle Harpalus melancholicus at Stackpole Warren in 2017 Statws a dosbarthiad y chwilen ddaear Harpalus melancholicus yng Nghwningar Ystagbwll yn 2017 2018-01-01 NRW_DS121121 Stackpole Warren supports the only known British population of the Endangered ground beetle Harpalus melancholicus, the Stackpole Seed-eater. This data collection was commissioned to attempt to determine its current status and distribution on Stackpole Warren. This survey has done much to characterise the habitat occupied by H. melancholicus, with adults recorded only from two small patches of habitat where the toe of a vegetated sand-dune encroaches over outcropping limestone. The survey has also confirmed that H. melancholicus is a seed-eater, with Lesser Hawkbit Leontodon saxatilis and probably thyme Thymus sp. as food items. It is hypothesised that H. melancholicus is ecologically highly specialised, with a patchy occurrence at Stackpole Warren, but that additional occupied habitat patches remain to be discovered. Alternative hypotheses are also presented. Stackpole Warren supports the only known British population of the Endangered ground beetle Harpalus melancholicus, the Stackpole Seed-eater. This data collection was commissioned to attempt to determine its current status and distribution on Stackpole Warren. This survey has done much to characterise the habitat occupied by H. melancholicus, with adults recorded only from two small patches of habitat where the toe of a vegetated sand-dune encroaches over outcropping limestone. The survey has also confirmed that H. melancholicus is a seed-eater, with Lesser Hawkbit Leontodon saxatilis and probably thyme Thymus sp. as food items. It is hypothesised that H. melancholicus is ecologically highly specialised, with a patchy occurrence at Stackpole Warren, but that additional occupied habitat patches remain to be discovered. Alternative hypotheses are also presented. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Telfer 10 Northall Road, Eaton Bray, Dunstable, Bedfordshire, LU6 2DQ mark.g.telfer@btinternet.com Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Protected sites Species distribution Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme invertebrate surveys ecological surveys NRW Thesaurus 2025-01-08 geonetwork.thesaurus.local.theme.converted_nrw-keywords There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Open Government Licence English biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 Wales (WLS) -5.16410914 -4.58197077 51.48722038 51.87608787 2017-08-22 2017-08-23 Telfer, M.G. 2018. The status and distribution of the ground beetle Harpalus melancholicus at Stackpole Warren in 2017. NRW Evidence Report No: 247, 26 pp, Natural Resources Wales, Bangor. The status and distribution of the ground beetle Harpalus melancholicus at Stackpole Warren in 2017 Database Database – records held in WID Recorder 6. Documents: pdf of the report in the DMS report archive. Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false Surveys were by visual searches in daytime and at night. Diurnal and nocturnal ground-searching was carried out on 22nd to 23rd August 2017. Eight to ten individuals of H. melancholicus were observed, all at night. This is noteworthy for a species otherwise known at Stackpole Warren from only four individuals recorded between 1992 and 2015. Surveys were by visual searches in daytime and at night. Diurnal and nocturnal ground-searching was carried out on 22nd to 23rd August 2017. Eight to ten individuals of H. melancholicus were observed, all at night. This is noteworthy for a species otherwise known at Stackpole Warren from only four individuals recorded between 1992 and 2015.