A survey of the spider Agroeca dentigera on Dyfi National Nature Reserve, with a particular focus on Ynylas Dunes (2013 to 2014).
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.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS115894
- Alternative Title
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- Arolwg o'r corryn Agroeca dentigera ar Warchodfa Natur Genedlaethol Dyfi, gan ganolbwyntio'n arbennig ar Dwyni Ynyslas (2013-2014).
- Metadata Language
- English
- Lineage
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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.
- Dataset Reference Date (Publication)
- 2015-03-31
Extent
Extent
- Geographic Extent
- SIR CEREDIGION - CEREDIGION
- Geographic Extent
- GWYNEDD - GWYNEDD
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Distribution
- Format Type and Description
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Database
()
- Specification
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[A] PDF of report available [B] Data to be added to Recorder 6
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Database
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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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.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- invertebrate surveys
- spiders
- araneae
- sand dune ecology
- Ynyslas Dyfi NNR
- RDB spider
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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A survey of the spider agroeca dentigera on Dyfi NNR with a particular focus on Ynyslas Dunes in 2013 and 2014
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
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There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© 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.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313135383934 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:41:13.58Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0