Macroinvertebrates in the Glaslyn / Dwyryd Estuary

This dataset contains the results of a macro-invertebrate survey of the Glaslyn/Dwyryd estuary undertaken in 1978 in order to better understand the ability of the estuary to receive wading birds that may be displaced by barrage construction. The purpose of this data capture was to assess the capacity of the estuary to receive wading birds that might be displaced from other estuaries on the Irish Sea flyway by barrage construction. Data capture also helped to obtain data relevant to the management of the adjacent Morfa Harlech National Nature Reserve and enabled collection of data on the marine fauna of the area.

Identifier: NRW_DS111147

Alternative Title

Macroinfertebratau yn Aber Dwyryd / Glaslyn

Metadata Language: English

Lineage: 82 sampling stations were established across the estuary. At each station five core samples were taken. Four were washed through a sieve and the portion retained was preserved in 5% formalin. These were then examined in the laboratory with the animals present counted and identified. The percentage volume of fines was also determined and a measure of organic content taken. The fifth core sample was bagged and preserved for sediment analysis. Salinity measurements of the estuary water were obtained for a high spring and a high neap tide. This forms part of a series of studies on the estuaries of Gwynedd made partly to assess their capacity to receive wading birds.

Dataset Reference Date (Publication): 1978-07-31

Temporal Extent

Begin date: 1978-01-01

End date: 1978-03-31

Topic category

Biota

Owner

Natural Resources Wales (NRW)

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

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

Originator

Nature Conservancy Council (NCC)

c/o Natural Resources Wales, Maes Y Ffynnon, Penrhosgarnedd, Bangor, LL57 2DW, Wales

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

Originator

Various

Enquiries Unit, Maes y Fynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW

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

Extent

Geographic Extent: GWYNEDD - GWYNEDD

Geographic Extent: Wales (WLS)

Map representing the geographic extent of the dataset

Vertical Extent

Medin Extent Keyword: soil and sediment

Format Type and Description

Database Database ()

Specification

[A] Hardcopy report. [B] Available in JNCC's copy of Marine Recorder (JNCCMNCR10000633).

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
Degree: false

Lineage: 82 sampling stations were established across the estuary. At each station five core samples were taken. Four were washed through a sieve and the portion retained was preserved in 5% formalin. These were then examined in the laboratory with the animals present counted and identified. The percentage volume of fines was also determined and a measure of organic content taken. The fifth core sample was bagged and preserved for sediment analysis. Salinity measurements of the estuary water were obtained for a high spring and a high neap tide. This forms part of a series of studies on the estuaries of Gwynedd made partly to assess their capacity to receive wading birds.

Keywords

GEMET - INSPIRE themes, version 1.0

Species distribution

Type: Theme

Citation

Date (Publication): 2008-06-01

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

Keywords

NRW Thesaurus

estuaries (see also specific estuary names)
Glaslyn Dwyryd estuary
macroinvertebrates
marine invertebrates
marine sediments (coastal sediments) (intertidal sediments) (subtidal sediments)
wading birds

Type: Theme

Citation

Date (Publication): 2023-12-31

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

Keywords

SeaDataNet Parameter Discovery Vocabulary

Zoobenthos taxonomic abundance
Bird behaviour

Type: Theme

Citation

Date (Revision): 2021-01-06

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

Code: British National Grid (EPSG::27700)

Content Information

NRW Profile

Custom Elements

NRW Related Title: Survey of macroinvertebrate populations in the Glaslyn / Dwyryd estuary complex

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 1991 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

File Identifier: 4f4c4942-4343-5764-6473-313131313437 XML

Metadata Language: English

Resource type: Dataset

Metadata Date: 2024-05-31T09:39:38.255Z

Metadata Standard Name: NRW

Metadata Standard Version: 1.0

pointOfContact

Natural Resources Wales (NRW)

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

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

Publishing Body

Access the portal

Full access to the portal and metadata.

Macroinvertebrates in the Glaslyn / Dwyryd Estuary

Identification

Temporal Extent

Extent

Extent

Vertical Extent

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

Keywords

Citation

Spatial Reference System

Content

Content Information

NRW Profile

Custom Elements

Constraints

Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

Use Constraints

Metadata

Metadata

Publishing Body