Cwm Idwal Vegetation Change Surveillance Project 1999-2004
The results of a five year surveillance project carried out in Cwm Idwal National Nature Reserve (NNR), from which grazing has been excluded on a long term experimental basis. The purpose of this data capture was to establish a detailed monitoring system to determine the long term impact of grazing removal on a range of vegetation communities; and, to determine the nature and direction of vegetation recovery in terms of its structure and composition.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS110473
- Alternative Title
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- Prosiect goruchwylio'r newid yn llystyfiant Cwm Idwal 1999-2004
- Metadata Language
- English
- Lineage
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Attributes recorded for vegetation included percentage cover, mean and maximum height for individual strata, total cover for individual species within quadrats, estimated total cover for bryophytes and lichens. Impacts were recorded in terms of estimated dunging, shoot nibbling and erosion. Photographs were taken throughout the project to assist in the process of plot relocation, to give an impression of the type and condition of vegetation at the time of recording, and to illustrate selected general and specific subjects. Baseline survey of 30 plots was carried out autumn 1998 to early summer 1999. The first repeat survey was carried out in the autumn of 2000 (10 of the 30 plots), second repeat survey took place in 2001 (same 10 plots as in 2000), third repeat survey in 2002 (same 10 plots plus 15 others), fourth repeat survey (same 10 plots as in 2000) and in 2004 all 30 plots were resurveyed at the end of the 5 year cycle. This surveillance data covers most vegetation communities however scree, chasmophytic and tall herb ledge vegetation are not included- they are being monitored under a separate programme.
- Dataset Reference Date (Publication)
- 2005-03-31
Temporal Extent
- Begin date
- 1998-01-01
- End date
- 2004-12-31
- Topic category
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- Environment
- Biota
Extent
Extent
- Geographic Extent
- GWYNEDD - GWYNEDD
- Geographic Extent
- Wales (WLS)
))
Distribution
- Format Type and Description
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Documents
Documents
()
- Specification
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The full data are available in digital form, results in terms of plot means of individual quadrats for groupings based on broad divisions are presented in the report. [A] Report- paper hardcopy, Word [B] Raw data - report and quadrat data tables in Excel [C] Photographic images as hard copies
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Documents
Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
Attributes recorded for vegetation included percentage cover, mean and maximum height for individual strata, total cover for individual species within quadrats, estimated total cover for bryophytes and lichens. Impacts were recorded in terms of estimated dunging, shoot nibbling and erosion. Photographs were taken throughout the project to assist in the process of plot relocation, to give an impression of the type and condition of vegetation at the time of recording, and to illustrate selected general and specific subjects. Baseline survey of 30 plots was carried out autumn 1998 to early summer 1999. The first repeat survey was carried out in the autumn of 2000 (10 of the 30 plots), second repeat survey took place in 2001 (same 10 plots as in 2000), third repeat survey in 2002 (same 10 plots plus 15 others), fourth repeat survey (same 10 plots as in 2000) and in 2004 all 30 plots were resurveyed at the end of the 5 year cycle. This surveillance data covers most vegetation communities however scree, chasmophytic and tall herb ledge vegetation are not included- they are being monitored under a separate programme.
Keywords
Keywords
Keywords
- NRW Thesaurus
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- Cwm Idwal
- Cwm Idwal NNR
- Eryri cSAC (Eryri SAC)
- Snowdonia (Eryri)
- grazing pressure
- sheep grazing
- grazing exclusions
- surveillance
- vegetation composition
- 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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Monitoring vegetation change in the Eryri SAC : fifth repeat survey and final report for Cwm Idwal
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 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.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313130343733 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:17:50.319Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0