The status and distribution of the ground beetle Harpalus melancholicus at Stackpole Warren in 2017
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.
- Identification
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Identification
- Identifier
- NRW_DS121121
- Alternative Title
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- Statws a dosbarthiad y chwilen ddaear Harpalus melancholicus yng Nghwningar Ystagbwll yn 2017
- Metadata Language
- English
- Lineage
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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.
- Additional Information
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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.
- Dataset Reference Date (Publication)
- 2018-01-01
Extent
Extent
- Geographic Extent
- Wales (WLS)
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Distribution
- Format Type and Description
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Database
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- Specification
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Database – records held in WID Recorder 6. Documents: pdf of the report in the DMS report archive.
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Database
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Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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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.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- ecological surveys
- invertebrate surveys
- 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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The status and distribution of the ground beetle Harpalus melancholicus at Stackpole Warren in 2017
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
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Access Constraints Directive
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- no limitations
Access Constraints Text
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There are no access restrictions on 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 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.
Attribution Statement
- Other constraints
- Open Government Licence (OGL)
Licence
- Other constraints
- Open Government Licence (OGL)
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313231313231 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:41:06.026Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0