- Thumbnail
- Resource ID
- 49b19e48-16b7-11ef-bbf0-ca7441fac38f
- Title
- NRW Freshwater River Macrophytes
- Date
- Aug. 19, 2025, midnight, Publication Date
- Abstract
- Macrophytes (water plants visible to the naked eye) can indicate the impact of pressures such as increased nutrients, flow pressures, channel alterations etc. The species present and their abundance give an indication as to the health of a river. This dataset is made up of site information, sample metrics and taxa details for each survey conducted across Wales by Natural Resources Wales and former Environment Agency Wales since 1993. These surveys are conducted as part of on-going monitoring of river water quality for legislative requirements and to meet business drivers. A strict methodology is applied when sampling for freshwater macrophytes. There is a core network of sites which are monitoring on a three-year rolling programme. These sites are added to for investigative work, or on an ad hoc basis. Sampling areas are located with a larger survey area and must be representative of the overall survey area. A standard cover-class method is the most commonly used method for sampling freshwater macrophytes. Macrophyte species are identified on site and confirmed in the laboratory if necessary. Redactions Some information has be redacted to make the data openly available. This includes Third party data Data collected for ongoing investigations Cancelled or incomplete surveys Taxa that falls within NRWs policy on Ecological data exempt from general release Update Frequency This data is continually updated with the most surveys undertaken in the summer period (June to September). Data from survey seasons is entered as soon as possible following the surveys. The external dataset is updated monthly to include new data, and may also contain corrections to previously published data due to quality assurance work. Information Warnings We do our best to avoid data quality problems, but as these datasets reflect the data we hold, they may contain errors The data is provided as a set of related data tables due to the quantity and structure of the data. A basic understanding of ecology and relational data is assumed. Data related to pollution incident investigations or protected species information is not released as locational information of these sites may be detrimental to ongoing investigations or species protection. Further Information: Please see the following documents for further information Attribution statement Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
- Edition
- --
- Responsible
- Andrew.Thomas.Jeffery
- Point of Contact
- Jeffery
- andrew.jeffery@cyfoethnaturiolcymru.gov.uk
- Purpose
- --
- Maintenance Frequency
- None
- Type
- not filled
- Restrictions
- None
- License
- Open Government Licence for Public Sector Information
- Language
- en
- Temporal Extent
- Start
- --
- End
- --
- Supplemental Information
- Data Quality
- --
- Extent
-
- x0: 146597.199797902
- x1: 355308.0
- y0: 164586.296917809
- y1: 395984.199957072
- Spatial Reference System Identifier
- EPSG:27700
- Keywords
- no keywords
- Category
- Environment
- Regions
-
Global