National Vegetation Classification Survey of Llantysillio / Ruabon Mountain, Minera and Llandegla Moor 2023
This dataset presents the results of a National Vegetation Classification (NVC) survey carried out on the Llantysilio/Ruabon Mountains and Minera SSSI, and Llandegla Moor SSSI. They are located in north-east Wales in Flintshire and Denbighshire. The area is largely unenclosed moorland. It includes the impressive scarp slope of Mynydd Eglwyseg, which was surveyed by the Countryside Council for Wales (CCW) from 2000-2002. This area supports a complex mosaic of calcicolous and acid grassland on the outcropping, steeply-sloping carboniferous limestone. Around 300ha of the survey area on Llantysilio Mountain was burnt in a major wildfire in 2018. The vegetation was surveyed between May and September 2023, by a team of botanists from JBA Consulting and specialist sub-contractors. Discrete stands of vegetation were identified, assigned to a NVC sub-communities and mapped onto aerial images based on field judgement and supported by target notes and quadrats.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS161325
- Teitl Amgen
-
- Llantysilio & Ruabon NVC 2023
- Laith Metadata
- English
- Datganiad
-
The National Vegetation Classification (NVC) is a phytosociological scheme developed to provide a comprehensive system to classify vegetation throughout Wales, Scotland and England. The final scheme was published in the five British Plant Communities volumes (Rodwell 1991a; 1991b; 1992; 1995; 2000). The system has been in widespread use since it was developed in the late 1980s. Since the publication of the original volumes much has been written to develop the classification further, including the Users’ Handbook (Rodwell 2006) and a review of proposed additions (Mountford 2011). The survey was carried out by suitably qualified surveyors between May - September 2023. Quadrat samples were recorded for each sub-community and further samples were collected wherever difficulties with the NVC placement were encountered or for large or variable stands. Target notes were made by surveyors to supplement the mapping and quadrat data. Target notes were used to describe important features, additional species and other notable characteristics of the vegetation. The field maps were digitised in QGIS 3.28 (QGIS.org 2023) and aligned to the Ordnance Survey Mastermap using the OSGB32, with features identified principally from aerial images supplied by Natural Resources Wales that were captured in 2021, with some confirmation of boundaries taken from ESRI satellite images. The area of each habitat presented in the report includes both ‘pure’ stands and stands which occur in a mosaic. The area of each vegetation type from a mosaic is based on the percentage cover in each mosaic assigned to each vegetation type from the field survey. The total area of the mapped polygon is measured from the GIS and divided into the relative proportion of each component. Although not used as the primary method for mapping the NVC communities some post hoc analysis of quadrats was completed. This was carried out using Tablefit Version 4 (Marrs et al. 2019) implemented through Version 3.2 of JVeg, JBA's bespoke Microsoft Excel-based wrapper tool for collating and analysing vegetation coverage data. This program allocates a goodness-of-fit ratio for the quadrat surveyed to the published NVC tables.
- Gwybodaeth ychwanegol
-
Heathcote SJ, Finch RA, Ruffino L, Sheehan KA, Thomas L, Wallis SM, Williams S, Wright S, 2023. National Vegetation Classification Survey of selected areas of the Lantysillio & Ruabon Mountains 2023. NRW Evidence Report No: 793, 128pp, Natural Resources Wales, Cardiff
- Dyddiad cyfeirnod y set ddata (Creu)
- 2025-01-08
Ystod amser
- Dyddiad cychwyn
- 2023-05-22
- Dyddiad gorffen
- 2023-09-25
- Categori pwnc
-
- Biota
Rhychwant
Rhychwant
- Hyd
- http://opendatacommunities.org/data/welsh-local-authorities#Welsh-Local-Authorities/W06000004
))
Dosbarthiad
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Geographic Information System
(
)
- Math
-
ESRI Feature Class
-
Documents
(
)
- Math
-
NRW Evidence Report available in MS Word or PDF Format
-
Image
(
)
- Math
-
Images taken during survey
-
Geographic Information System
(
)
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Cydymffurfiad
- 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
- Eglurhad
-
This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Gradd
- false
- Datganiad
-
The National Vegetation Classification (NVC) is a phytosociological scheme developed to provide a comprehensive system to classify vegetation throughout Wales, Scotland and England. The final scheme was published in the five British Plant Communities volumes (Rodwell 1991a; 1991b; 1992; 1995; 2000). The system has been in widespread use since it was developed in the late 1980s. Since the publication of the original volumes much has been written to develop the classification further, including the Users’ Handbook (Rodwell 2006) and a review of proposed additions (Mountford 2011). The survey was carried out by suitably qualified surveyors between May - September 2023. Quadrat samples were recorded for each sub-community and further samples were collected wherever difficulties with the NVC placement were encountered or for large or variable stands. Target notes were made by surveyors to supplement the mapping and quadrat data. Target notes were used to describe important features, additional species and other notable characteristics of the vegetation. The field maps were digitised in QGIS 3.28 (QGIS.org 2023) and aligned to the Ordnance Survey Mastermap using the OSGB32, with features identified principally from aerial images supplied by Natural Resources Wales that were captured in 2021, with some confirmation of boundaries taken from ESRI satellite images. The area of each habitat presented in the report includes both ‘pure’ stands and stands which occur in a mosaic. The area of each vegetation type from a mosaic is based on the percentage cover in each mosaic assigned to each vegetation type from the field survey. The total area of the mapped polygon is measured from the GIS and divided into the relative proportion of each component. Although not used as the primary method for mapping the NVC communities some post hoc analysis of quadrats was completed. This was carried out using Tablefit Version 4 (Marrs et al. 2019) implemented through Version 3.2 of JVeg, JBA's bespoke Microsoft Excel-based wrapper tool for collating and analysing vegetation coverage data. This program allocates a goodness-of-fit ratio for the quadrat surveyed to the published NVC tables.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
-
NRW Thesaurus
-
- VEGETATION
- National Vegetation Classification (NVC)
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2025-01-08
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
-
This dataset has not been assessed yet
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
-
This dataset has not been assessed yet
Datganiad Priodoli
- Cyfyngiadau eraill
-
Replace this text with the Attribution Statement