4f4c4942-4343-5764-6473-313135383934 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2024-05-31T09:41:13.58Z NRW 1.0 wel British National Grid (EPSG::27700) A survey of the spider Agroeca dentigera on Dyfi National Nature Reserve, with a particular focus on Ynylas Dunes (2013 to 2014). A survey of the spider Agroeca dentigera on Dyfi National Nature Reserve, with a particular focus on Ynylas Dunes (2013 to 2014). Arolwg o'r corryn Agroeca dentigera ar Warchodfa Natur Genedlaethol Dyfi, gan ganolbwyntio'n arbennig ar Dwyni Ynyslas (2013-2014). 2015-03-31 NRW_DS115894 The sand dune system at Ynyslas, part of Dyfi National Nature Reserve (NNR), is the only known UK locality for the IUCN Vulnerable liocranid spider Agroeca dentigera. The main purposes of the survey work in 2013 and 2014 was to re-locate the spider, last recorded in 2002 and attempt to define its habitat preferences and ecological requirements by searching the dunes and other potentially suitable habitats within the NNR. The main purposes of the survey work in 2013 and 2014 was to re-locate the spider, last recorded in 2002 and attempt to define its habitat preferences and ecological requirements by searching the dunes and other potentially suitable habitats within the NNR. The aim of this survey was to determine the current status and distribution of the spider Agroeca dentigera. The sand dune system at Ynyslas, part of Dyfi National Nature Reserve (NNR), is the only known UK locality for the IUCN Vulnerable liocranid spider Agroeca dentigera. The main purposes of the survey work in 2013 and 2014 was to re-locate the spider, last recorded in 2002 and attempt to define its habitat preferences and ecological requirements by searching the dunes and other potentially suitable habitats within the NNR. The main purposes of the survey work in 2013 and 2014 was to re-locate the spider, last recorded in 2002 and attempt to define its habitat preferences and ecological requirements by searching the dunes and other potentially suitable habitats within the NNR. The aim of this survey was to determine the current status and distribution of the spider Agroeca dentigera. 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 National Museums Liverpool National Museums Liverpool, 127 Dale Street, Liverpool, L2 2JH, England steve.judd@liverpoolmuseums.org.uk Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en sd">Species distribution Species distribution GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme invertebrate surveys spiders araneae sand dune ecology Ynyslas Dyfi NNR RDB spider NRW Thesaurus NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW, 2015. There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source. English biota SeaVoX Vertical Co-ordinate Coverages SeaVoX Vertical Co-ordinate Coverages 2021-01-06 SIR CEREDIGION - CEREDIGION GWYNEDD - GWYNEDD -4.09042728 -3.88502338 52.46437737 52.57828018 2013-10-01 2014-10-10 A survey of the spider agroeca dentigera on Dyfi NNR with a particular focus on Ynyslas Dunes in 2013 and 2014 Database [A] PDF of report available [B] Data to be added to Recorder 6 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 false Sites were visited in October 2013, April 2014 and October 2014 and surveyed using a combination of hand-searching and mechanical techniques. A total of 136 person hours were given to searching potential habitats. A single mature female of Agroeca dentigera was found on 3rd October 2014 in an area of dense marram within the dune system. In total 94 species of spider were recorded, including Philodromus fallax and Ceratinopsis romana, 11 of these species are thought to be new to Dyfi NNR. An additional 47 other invertebrate species were recorded, 16 of which are thought to be new to Dyfi NNR. Ynyslas Dunes, Dyfi NNR 2013 - 2014 High. Some voucher specimens have been retained and are in the collections in Liverpool Museum. The 2014 record of Agroeca dentigera was again from dense marram in the dune system and searching of other potential habitats have so far produced negative results. So whilst it is still not possible to elucidate on its habitat preferences it seems likely to be associated with this ecosystem at Dyfi NNR. The efforts required to find the species suggest it occurs at very low densities, making it difficult to recommend how to direct future survey and monitoring protocols. A modified leaf blower was used on one occasion. The data was provided to NRW and is to be transferred and made available through Recorder 6. Data transfer is currently underway. Sites were visited in October 2013, April 2014 and October 2014 and surveyed using a combination of hand-searching and mechanical techniques. A total of 136 person hours were given to searching potential habitats. A single mature female of Agroeca dentigera was found on 3rd October 2014 in an area of dense marram within the dune system. In total 94 species of spider were recorded, including Philodromus fallax and Ceratinopsis romana, 11 of these species are thought to be new to Dyfi NNR. An additional 47 other invertebrate species were recorded, 16 of which are thought to be new to Dyfi NNR. Ynyslas Dunes, Dyfi NNR 2013 - 2014 High. Some voucher specimens have been retained and are in the collections in Liverpool Museum. The 2014 record of Agroeca dentigera was again from dense marram in the dune system and searching of other potential habitats have so far produced negative results. So whilst it is still not possible to elucidate on its habitat preferences it seems likely to be associated with this ecosystem at Dyfi NNR. The efforts required to find the species suggest it occurs at very low densities, making it difficult to recommend how to direct future survey and monitoring protocols. A modified leaf blower was used on one occasion. The data was provided to NRW and is to be transferred and made available through Recorder 6. Data transfer is currently underway.