4f4c4942-4343-5764-6473-313631323738 English NRW_DS122446 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-05-13T13:35:02.294Z NRW 1.0 wel Latitude and Longitude (EPSG::4326) KiEco Freshwater Ecology: River Macroinvertebrates - Geospatial KiEco Freshwater Ecology: River Macroinvertebrates - Geospatial KiECO Ecoleg Dŵr Croyw Macroinfertebratau afonydd Freshwater River Macroinvertebrates KiEco Freshwater River Macro-invertebrates Sample Metric.lyr KiEco Freshwater River Macro-invertebrates Site Detail.lyr KiEco Freshwater River Macro-invertebrates Taxa.lyr 2026-05-12 NRW_DS161278 Freshwater macroinvertebrates are used as an indicator of water quality and river flow requirements due to the relative immobility and abundance. This dataset contains site, sample, metric and taxa information from freshwater river macroinvertebrate surveys carried out across Wales by Natural Resources Wales and former Environment Agency Wales since 1978 and onwards. These surveys are conducted as part of on-going monitoring of river water quality for legislative requirements and to meet business drivers. A version of this data is available in a Darwin Core format, please see NRW_DS122460 for more information. Freshwater macroinvertebrates are used as an indicator of water quality and river flow requirements due to the relative immobility and abundance. This dataset contains site, sample, metric and taxa information from freshwater river macroinvertebrate surveys carried out across Wales by Natural Resources Wales and former Environment Agency Wales since 1978 and onwards. These surveys are conducted as part of on-going monitoring of river water quality for legislative requirements and to meet business drivers. A version of this data is available in a Darwin Core format, please see NRW_DS122460 for more information. Defnyddir macroinfertebratau dŵr croyw fel dangosydd o ansawdd dŵr a gofynion llif afonydd oherwydd eu disymudedd cymharol a’u helaethrwydd. Mae’r set ddata hon yn cynnwys gwybodaeth am safle, sampl, metrigau a thacsonau o arolygon macroinfertebratau afonydd dŵr croyw a gynhaliwyd ledled Cymru gan Cyfoeth Naturiol Cymru ac Asiantaeth yr Amgylchedd Cymru gynt ers 1978 ac ymlaen. Cynhelir yr arolygon hyn fel rhan o waith monitro parhaus o ansawdd dŵr afonydd ar gyfer gofynion deddfwriaethol ac i fodloni ysgogwyr busnes. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Environment Agency (EA) Millbank Tower, 25th Floor, 21//24 Millbank, London, SW1P 4XL, England enquiries@environment-agency.gov.uk http://www.environment-agency.gov.uk/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme freshwater biology freshwater invertebrate NBN Atlas biological surveys biological monitoring freshwater (fresh water, open water) (see also freshwater ecology) (see also inland waters,rivers,lakes) NRW Thesaurus 2026-03-04 geonetwork.thesaurus.local.theme.converted_nrw-keywords There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations © 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. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Open Government Licence English biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 Wales (WLS) -5.311 -2.647 51.384 53.427 1978-04-07 Delimited Unknown Data can be downloaded from NBN Atlas in .csv format https://datamap.gov.wales/capabilities/layergroup/6703/?ows_service=wms OGC:WMS WMS https://datamap.gov.wales/layergroups/geonode:nrw_river_macroinvertebrates WWW:LINK-1.0-http--link View and Download Service 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 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false A strict methodology is applied when sampling for freshwater river macroinvertebrates. There is a core network of sites which are monitored on a three-yearly rolling programme. These sites are located where risk assessment has shown significant risk of failure of WFD ecological quality standards. In addition sites may be sampled 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 three-minute kick-sample is the most commonly used sampling method, although where necessary alternative methods are used, for example in deeper water or for investigative work. Once samples are collected they are sent NRW ecology laboratories for identification using standard methodologies, employing a strict Analytical Quality Control (AQC) procedure. Once the data is collated in the central database, it has then been extracted and QA'd before being published. It is important to note that this dataset will include some sampling events from recent months where sampling has been undertaken but laboratory analysis has not been completed, therefore the full complement of taxa for that sampling event will not yet be uploaded. These records will be completed in future data uploads from NRW to the NBN Atlas. This dataset also includes records for some non-macroinvertebrate species, such as birds and fish, that were either observed or collected during sampling. Any non-target organisms collected during sampling were immediately returned to the river. 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 - Location of protected species where releasing details of their location could have a detrimental effect e.g. freshwater pearl mussels. Update Frequency This data is continually updated with the most surveys undertaken in the spring and autumn. Data from survey seasons is often not enter at the time of capture and can be several months before its is entered into the system. 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. Not all sites have environmental base data listed. Much of the data collected prior to 2002 was recorded using a logarithmic scale 3=A, 33 = B etc. Prior to 2012, most taxa were only recorded to family level, we moved to mixed-taxon level at this time. For this reason, some early samples may show blanks for some of the indices which required a higher level of taxonomic detail eg. LIFE species. A strict methodology is applied when sampling for freshwater river macroinvertebrates. There is a core network of sites which are monitored on a three-yearly rolling programme. These sites are located where risk assessment has shown significant risk of failure of WFD ecological quality standards. In addition sites may be sampled 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 three-minute kick-sample is the most commonly used sampling method, although where necessary alternative methods are used, for example in deeper water or for investigative work. Once samples are collected they are sent NRW ecology laboratories for identification using standard methodologies, employing a strict Analytical Quality Control (AQC) procedure. Once the data is collated in the central database, it has then been extracted and QA'd before being published. It is important to note that this dataset will include some sampling events from recent months where sampling has been undertaken but laboratory analysis has not been completed, therefore the full complement of taxa for that sampling event will not yet be uploaded. These records will be completed in future data uploads from NRW to the NBN Atlas. This dataset also includes records for some non-macroinvertebrate species, such as birds and fish, that were either observed or collected during sampling. Any non-target organisms collected during sampling were immediately returned to the river. 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 - Location of protected species where releasing details of their location could have a detrimental effect e.g. freshwater pearl mussels. Update Frequency This data is continually updated with the most surveys undertaken in the spring and autumn. Data from survey seasons is often not enter at the time of capture and can be several months before its is entered into the system. 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. Not all sites have environmental base data listed. Much of the data collected prior to 2002 was recorded using a logarithmic scale 3=A, 33 = B etc. Prior to 2012, most taxa were only recorded to family level, we moved to mixed-taxon level at this time. For this reason, some early samples may show blanks for some of the indices which required a higher level of taxonomic detail eg. LIFE species. Defnyddir methodoleg gaeth wrth samplu am facroinfertebrata afonydd dŵr croyw. Mae rhwydwaith craidd o safleoedd sy'n cael eu monitro ar raglen dreigl tair blynedd. Mae'r safleoedd hyn wedi'u lleoli lle mae asesiad risg wedi dangos risg sylweddol o fethiant safonau ansawdd ecolegol y Gyfarwyddeb Fframwaith Dŵr. Yn ogystal gellir samplu safleoedd ar gyfer gwaith ymchwiliol neu ar sail ad hoc. Mae ardaloedd samplu wedi'u lleoli gydag ardal arolwg fwy ac mae'n rhaid iddynt fod yn gynrychioliadol o'r ardal arolwg gyffredinol. Cic-sampl tair munud yw’r dull samplu a ddefnyddir amlaf, er lle bo angen, defnyddir dulliau amgen, er enghraifft mewn dŵr dyfnach neu ar gyfer gwaith ymchwiliol. Unwaith y bydd samplau wedi'u casglu, byddant yn cael eu hanfon at labordai ecoleg CNC i'w hadnabod gan ddefnyddio methodolegau safonol, gan ddefnyddio gweithdrefn Rheoli Ansawdd Dadansoddol llym. Unwaith y bydd y data wedi'i goladu yn y gronfa ddata ganolog, mae wedi'i echdynnu a'i ansawdd wedi'i sicrhau cyn ei gyhoeddi. Mae'n bwysig nodi y bydd y set ddata hon yn cynnwys rhai digwyddiadau samplu o'r misoedd diwethaf lle mae samplu wedi'i wneud ond nad yw dadansoddiad labordy wedi'i gwblhau, felly ni fydd y cyflenwad llawn o dacsonau ar gyfer y digwyddiad samplu hwnnw'n cael ei lanlwytho eto. Bydd y cofnodion hyn yn cael eu cwblhau wrth lanlwytho data yn y dyfodol o CNC i Atlas y Rhwydwaith Bioamrywiaeth Cenedlaethol. Mae'r set ddata hon hefyd yn cynnwys cofnodion ar gyfer rhai rhywogaethau nad ydynt yn macroinfertebratau, megis adar a physgod, a welwyd neu a gasglwyd yn ystod y samplu. Cafodd unrhyw organebau nad oeddent yn darged a gasglwyd yn ystod y samplu eu dychwelyd ar unwaith i'r afon. Golygiadau Mae rhywfaint o wybodaeth wedi’i golygu i sicrhau bod y data ar gael yn agored. Mae hyn yn cynnwys: Data trydydd parti Data a gasglwyd ar gyfer ymchwiliadau parhaus Arolygon wedi’u canslo neu heb eu cwblhau Lleoliad rhywogaethau a warchodir lle gallai rhyddhau manylion eu lleoliad gael effaith andwyol, ee misglod perlog yr afon. Amlder Diweddaru Mae'r data hwn yn cael ei ddiweddaru'n barhaus ac mae’r nifer mwyaf o arolygon yn cael eu cynnal yn y gwanwyn a'r hydref. Yn aml, nid yw data o dymhorau arolygon yn cael eu mewnbynnu ar adeg eu cipio a gall fod sawl mis cyn iddo gael ei roi yn y system. Mae’r set ddata allanol yn cael ei diweddaru yn fisol i gynnwys data newydd, a gall hefyd gynnwys cywiriadau i ddata a gyhoeddwyd yn flaenorol oherwydd gwaith sicrhau ansawdd. Rhybuddion Gwybodaeth Gwnawn ein gorau i osgoi problemau ansawdd data, ond gan fod y setiau data hyn yn adlewyrchu’r data sydd gennym, gallant gynnwys gwallau. Darperir y data fel set o dablau data cysylltiedig oherwydd maint a strwythur y data. Tybir bod dealltwriaeth sylfaenol o ecoleg a data perthynol yn bodoli. Nid yw data sy'n ymwneud ag ymchwiliadau i achosion o lygredd neu wybodaeth am rywogaethau a warchodir yn cael ei ryddhau oherwydd gallai gwybodaeth am leoliad y safleoedd hyn fod yn niweidiol i ymchwiliadau parhaus neu warchod rhywogaethau. Nid oes gan bob safle ddata sylfaen amgylcheddol wedi'i restru. Cofnodwyd llawer o’r data a gasglwyd cyn 2002 gan ddefnyddio graddfa logarithmig 3=A, 33 = B ac ati. Cyn 2012, dim ond ar lefel teulu yn unig y cofnodwyd y rhan fwyaf o dacsonau, ac ar yr adeg hon gwnaethom symud tuag at gofnodi lefel tacsonau cymysg. Am y rheswm hwn, gall rhai samplau cynnar ddangos bylchau ar gyfer rhai o'r mynegeion a oedd yn gofyn am lefel uwch o fanylion tacsonomig ee rhywogaethau LIFE.