Results of a Study into the Use of a Phase 2 Sampling Grid as a Monitoring Strategy for the Mawddach Estuary. (1999 CCW Marine Monitoring trials)

The aim of this survey was to investigate the feasibility of using a phase 2 sampling grid methodology to determine the proportion of muddy and sandy communities and the distribution of major communities within the estuary. The Mawddach is one of the best examples of a small, drying, bar-built estuary in Britain and, with its mountainous catchment area it has some of the lowest nutrient inputs in Wales. In order to be able to report on the condition of the estuary a number of attributes have been identified which require monitoring. This dataset contains the results of a survey carried out to trial a sampling strategy and methodology that addresses two of these attributes: - The relative proportion of muddy and sandy communities. - The distribution of major communities within the estuary.

Dynodydd: NRW_DS111146

Teitl Amgen

1999 CCW/NWNWSFC Mawddach Estuary littoral survey JNCCMNCR40000739
Canlyniadau astudiaeth ar ddefnyddio grid samplu cam 2 fel strategaeth fonitro yn aber Mawddach

Laith Metadata: English

Datganiad: MapInfo was used to set up an evenly spaced grid of sampling stations across the whole estuary, from high water springs to low water springs. The grid was scaled to allow for at least five sampling stations on each of the major intertidal biotopes (this done using the 1997 Marine Intertidal Phase 1 map of the estuary). An extra 30 sample stations were added to account for 'minor' biotopes not already covered by the grid. At each sample station (saltmarsh was not sampled) sediment surface features and conspicuous species were noted. Eight cores were collected from each sample station. These were pooled and the infauna subsequently processed. The fauna present, identified to species level, were recorded on a spreadsheet as were the results of analysis of particle size characteristics of the granulomatric sample. The infaunal and granulometrc data were then processed to identify the biotopes.

Dyddiad cyfeirnod y set ddata (Cyhoeddiad): 2001-04-30

Ystod amser

Dyddiad cychwyn: 1999-09-08

Dyddiad gorffen: 1999-10-13

Categori pwnc

Biota

Perchennog

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Cychwynnwr

Various contractors

See Natural Resources Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresourceswales.gov.uk/splash?orig=/

Rhychwant

Hyd: GWYNEDD - GWYNEDD

Hyd: Wales (WLS)

Map representing the geographic extent of the dataset

Maint Fertigol

Maint allweddair MEDIN: benthic boundary layer

Maint Fertigol

Gwerth lleiaf: -6.1

Gwerth uchaf: -14

System Gyfeirio Cydlynu Fertigol: urn:ogc:def:datum:EPSG::5100 Sea Level depth is unadjusted and does not take into account tidal height

Fformat - Math a Disgrifiad

Database Database ()

Math

[A] The data on species, sediment analysis, biotope etc are recorded on paper MNCR forms and held in Marine Recorder. [B] The results are also presented in a hardcopy report format. [C] Spatial data is held as MapInfo GIS files.

Ansawdd Data

Cwmpas Ansawdd: Dataset

Cydymffurfiad: 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
Eglurhad
Gradd: false

Datganiad: MapInfo was used to set up an evenly spaced grid of sampling stations across the whole estuary, from high water springs to low water springs. The grid was scaled to allow for at least five sampling stations on each of the major intertidal biotopes (this done using the 1997 Marine Intertidal Phase 1 map of the estuary). An extra 30 sample stations were added to account for 'minor' biotopes not already covered by the grid. At each sample station (saltmarsh was not sampled) sediment surface features and conspicuous species were noted. Eight cores were collected from each sample station. These were pooled and the infauna subsequently processed. The fauna present, identified to species level, were recorded on a spreadsheet as were the results of analysis of particle size characteristics of the granulomatric sample. The infaunal and granulometrc data were then processed to identify the biotopes.

Allweddair

GEMET - INSPIRE themes, version 1.0

Habitats and biotopes

Math: Theme

Dyfyniad

Dyddiad (Cyhoeddiad): 2008-06-01

Cod: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair

NRW Thesaurus

Pen Llyn a'r Sarnau SAC
Mawddach Estuary
Phase 2 Survey (Phase II)
monitoring (see specific types of monitoring eg. woodland monitoring)

Math: Theme

Dyfyniad

Dyddiad (Cyhoeddiad): 2023-12-31

Cod: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair

SeaDataNet Parameter Discovery Vocabulary

Habitat characterisation
Habitat extent
Zoobenthos taxonomic abundance
Zoobenthos generic abundance

Math: Theme

Dyfyniad

Dyddiad (Adolygu): 2021-01-06

Cod: geonetwork.thesaurus.external.theme.rdf+xml

Cod: British National Grid (EPSG::27700)

Gwybodaeth Cynnwys

Proffil CNC

Elfennau CNC

Teitlau cysylltiedig CNC: The establishment of a programme of surveillance and monitoring for judging the condition of the features of Pen Llyn a'r Sarnau cSAC : 1. Progress to March 2001

Cyfyngiadau

Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus

Math o Gyfyngiad: Other restrictions

Cyfarwyddeb Cyfyngiadau Mynediad

Cyfyngiadau: no limitations

Testun cyfyngiadau mynediad

Cyfyngiadau eraill: There are no access restrictions to this data. NRW may release, publish or disseminate it freely

Defnyddiwch gyfyngiadau

Cyfyngiadau Defnyddio: Other restrictions

Cyfyngiadau eraill: © CNC/NRW 2001 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

Dynodydd Ffeil: 4f4c4942-4343-5764-6473-313131313436 XML

Laith Metadata: English

Dynodydd Rhiant: Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder
NRW_DS114501

Math o adnodd: Dataset

Dyddiad Metadata: 2024-05-31T09:23:34.223Z

Enw Safonol Metadata: NRW

Fersiwn Metadata: 1.0

Pwynt Cyswllt

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Corff Cyhoeddi

Mynediad i'r Porth

Mynediad llawn i'r porth a'r metadata.

Results of a Study into the Use of a Phase 2 Sampling Grid as a Monitoring Strategy for the Mawddach Estuary. (1999 CCW Marine Monitoring trials)

Dull adnabod

Ystod amser

Rhychwant

Rhychwant

Maint Fertigol

Maint Fertigol

Dosbarthiad

Ansawdd

Ansawdd Data

Allweddeiriau

Allweddair

Dyfyniad

Allweddair

Dyfyniad

Allweddair

Dyfyniad

System Cyfeirio Gofodol

Cynnwys

Gwybodaeth Cynnwys

Proffil CNC

Elfennau CNC

Cyfyngiadau

Cyfyngiadau

Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus

Cyfarwyddeb Cyfyngiadau Mynediad

Testun cyfyngiadau mynediad

Defnyddiwch gyfyngiadau

Metadata

Metadata

Corff Cyhoeddi