Macrophyte Survey of Welsh Lakes 2014

Natural Resources Wales (NRW) commissioned ECUS Ltd to collect and present ecological data from 25 lakes across eight local authority areas in Wales. The data were required to support NRW's integrated monitoring programme for the Water Framework Directive (WFD), protected sites including Special Areas of Conservation (SACs), Special Protection Areas (SPAs), and Sites of Special Scientific Interest (SSSIs), as well as other legislative and policy requirements.


The lakes were selected for survey for a number of reasons:


SAC: Monitoring of a Special Area of Conservation feature (Natura 2000 site).

SSSI: Monitoring of a Site of Special Scientific Interest feature.

WFD: Water Framework Directive surveillance network site.

ND: Nitrates Directive monitoring site.


Two notable species were recorded during the surveys. Floating water-plantain (Luronium natans), a European Protected Species, was recorded at seven lakes: Llyn Egnant, Llyn Gynon, Llyn Teifi, Llyn Cerrigllwydion Isaf, Gwnllyn, Llyn Padarn, and Llyn Tegid. All of these are known locations for the species.


Starry stonewort (Nitellopsis obtusa), listed as Vulnerable on the UK Red List (JNCC, 2014), was recorded at Llangorse Lake. This represents only the second known record for Wales and a new record for this well-studied lake.

Identification

Identifier
NRW_DS115898
Alternative Title
  • Macrophyte Survey of Welsh Lakes for Habitats Directive and Water Framework Directive Monitoring, 2014
  • Arolwg o Facroffytau Llynnoedd Cymru ar gyfer gwaith monitro’r Gyfarwyddeb Cynefinoedd a’r Gyfarwyddeb Fframwaith Dŵr (2014)
Metadata Language
English
Lineage

Aquatic macrophyte surveys were undertaken at all 25 lakes using the JNCC Common Standards Monitoring Guidance and the WFD LEAFPACS2 survey methodology. LEAFPACS metrics were calculated from the survey data.


Depth profiles of temperature and dissolved oxygen were collected at a single location within each lake, and observations of pressures and impacts affecting the lakes were recorded.


Bathymetric surveys were completed for seven previously unsurveyed lakes, and the resulting data were analysed using GIS software.
Additional Information

Baxter, E, and Stewart, N. (2015), Macrophyte Survey of Welsh Lakes for Habitats Directive and Water Framework Directive Monitoring, 2014, Natural Resources Wales, NRW Evidence Report No: 52, 78pp.
Dataset Reference Date (Publication)
2015-03-31

Temporal Extent

Begin date
2014-09-08
End date
2014-11-21
 
Topic category
  • Biota
  • Elevation
  • Environment
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Ecus Ltd -
Brook Holt, 3 Blackburn Road, Sheffield, South Yorkshire, S61 2DW
http://www.ecusltd.co.uk/
 

Extent

Extent

Geographic Extent
POWYS - POWYS
Geographic Extent
SIR CEREDIGION - CEREDIGION
Geographic Extent
CONWY - CONWY
Geographic Extent
WRECSAM - WREXHAM
Geographic Extent
GWYNEDD - GWYNEDD
Geographic Extent
SIR YNYS MON - ISLE OF ANGLESEY
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Distribution

Format Type and Description
  • Binary ( Unknown )

    Specification

    Excel spreadsheet containing grid references; LEAFPACS spreadsheets in Excel format; Excel spreadsheet containing water quality depth profiles; Confidential spreadsheet containing landowner information

  • Documents ( Unknown )

    Specification

    Maps in PDF format; Bathymetry maps in PDF format; Final report in Word and PDF formats

  • Image ( Unknown )

    Specification

    JPEG images and accompanying Excel catalogue

  • Geographic Information System ( Unknown )

    Specification

    GIS layers used to create bathymetry maps

 

Quality

Data quality

Quality Scope
Dataset
Conformity
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
Explanation

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

Aquatic macrophyte surveys were undertaken at all 25 lakes using the JNCC Common Standards Monitoring Guidance and the WFD LEAFPACS2 survey methodology. LEAFPACS metrics were calculated from the survey data.


Depth profiles of temperature and dissolved oxygen were collected at a single location within each lake, and observations of pressures and impacts affecting the lakes were recorded.


Bathymetric surveys were completed for seven previously unsurveyed lakes, and the resulting data were analysed using GIS software.
 

Keywords

Keywords

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus
  • Llyn Conwy
  • Llyn Gynon
  • Llangorse Lake (llyn Safadden)
  • Water Framework Directive (WFD)
  • Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC)
  • Llyn Idwal
  • Llyn Idwal
  • Llyn Maelog
  • Llyn Tegid
  • Llyn Padarn
  • SSSI (Sites of Special Scientific Interest)
Type
Theme

Citation

Date (Publication)
2026-08-27
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Content Information

NRW Profile

Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Restriction type
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

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

© 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.
 

Attribution Statement

Other constraints

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313135383938 XML
Metadata Language
English
Parent Identifier
Welsh Lakes Survey and Monitoring

NRW_DS123035
Resource type
Dataset
Metadata Date
2026-10-01T14:51:37.642Z
Metadata Standard Name
NRW
Metadata Standard Version

1.0

pointOfContact
  Data Services Team -
Natural Resources Wales (NRW), Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
 
 

Publishing Body

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