Freshwater Macrophytes in Nant Teyrn - Freshwater Environmental Change Protocol (2006)
Scott Wilson was commissioned to undertake a macrophyte survey of Nant Teyrn in Snowdonia National Park. The aim of this survey was to provide macrophyte monitoring data on a 100m stretch of Nant Teyrn within the Snowdonia Environmental Change Network (ECN) terrestrial site. The following elements were recorded: · Macrophyte species present and their relative abundance with reference to the check list of aquatic macrophytes used in ECN. Macrophytes include any plant observable by the naked eye and nearly always identifiable when observed.This includes all aquatic vascular plants and bryophytes, together with groups of algae which can be seen to be composed predominantly of a single species · Species distribution along a river length and zonation at selected sample points. · Physical characteristics of the sampling location
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS115638
- Alternative Title
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- Macroffytau Dwr Croyw yn Nant Teyrn - Protocol Newid Amgylcheddol Dwr Croyw (2006)
- Metadata Language
- English
- Lineage
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The macrophyte survey covered a 50 m length of the river immediately upstream of the ECN chemical sample point and 50 metres immediately downstream of the weir. The two 50 m survey sections were measured accurately along the left bank using a tape measure to ensure ease of future replication. Each 50 m length was divided into five 10m units using ranging poles and a field assistant to mark the end points of each unit. Percentage cover and relative abundance estimates were made for all species of floating and submerged macrophytes contained within the river channel area. All such macrophytes seen submerged or partly submerged at low flow levels were recorded. At the sides of the river all macrophytes growing on parts of the substrata that are likely to be submerged for more than 85% of the time were also included. Percentage cover estimates were made for all macrophyte species in the river channel in each 10 m section of the 100 m length. The following attributes were recorded in each 10 m survey unit as an aid in the interpretation of macrophyte data: Width, Depth, Substrate, Habitats, Shading, Water clarity and Bed stability.
- Dataset Reference Date (Publication)
- 2006-10-31
Temporal Extent
- Begin date
- 2006-07-24
- End date
- 2006-07-24
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- GWYNEDD - GWYNEDD
))
Distribution
- Format Type and Description
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Documents
()
- Specification
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[A] The final report in Microsoft Word and Adobe PDF formats. [B] Raw data workbook in excel format
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Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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The macrophyte survey covered a 50 m length of the river immediately upstream of the ECN chemical sample point and 50 metres immediately downstream of the weir. The two 50 m survey sections were measured accurately along the left bank using a tape measure to ensure ease of future replication. Each 50 m length was divided into five 10m units using ranging poles and a field assistant to mark the end points of each unit. Percentage cover and relative abundance estimates were made for all species of floating and submerged macrophytes contained within the river channel area. All such macrophytes seen submerged or partly submerged at low flow levels were recorded. At the sides of the river all macrophytes growing on parts of the substrata that are likely to be submerged for more than 85% of the time were also included. Percentage cover estimates were made for all macrophyte species in the river channel in each 10 m section of the 100 m length. The following attributes were recorded in each 10 m survey unit as an aid in the interpretation of macrophyte data: Width, Depth, Substrate, Habitats, Shading, Water clarity and Bed stability.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- aquatic macrophytes
- macrophyte surveys
- freshwater (fresh water, open water) (see also freshwater ecology) (see also inland waters,rivers,lakes)
- Special Areas of Conservation (SAC) - SAC monitoring
- Nant Teyrn
- 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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Freshwater macrophytes in Nant Teyrn : freshwater environmental change protocol
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 2006 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
- 4f4c4942-4343-5764-6473-313135363338 XML
- Metadata Language
- English
- Parent Identifier
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Condition monitoring of Special Areas of Conservation (SACs) in Wales
NRW_DS110194
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:38:48.235Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0