Species point records from 1978 UCNW Glaslyn/Dwyryd estuary littoral sediment survey

Published by:
Joint Nature Conservation Committee
Last updated:
15 December 2015
Topic:
Environment
Licence:
Open Government Licence

Summary

Benthic survey of Glaswyn/Dwyryd Estuary sandflats, adjacent to Morfa Harlech NNR. The estuary is extensive at 8.2 km. Sediments are of marine sand collected by Langshore drift in Coreligan Bay, and accretion in the estuarine area. Two obvious faunal trends ar apparent when the main part of the estuary. A salinity trend restricting Anguilla tenuis and Bathyporeia pelagica to low ground near the mouth and a sand/mobility/shelter/height based trend from the sparse fauna of the sandy low water channels to the organically richer muddy salt marsh fringe. The basin just above Portmadoc town bridge is an especially muddy artificial habitat sheltered by embankments and adjacent to the town sewage works. This mud seems to hold Nereis diversicolor, Prionospio cirifera and oligochaetes.

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1978-UCNW-Glaslyn-Dwyryd-estuary-littoral-sediment-survey.csv CSV 15 December 2015 Preview

Additional information

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Added to data.gov.uk
2018-05-17
Access contraints
no limitations
Harvest GUID
5e41bf62-f51e-4e5e-b2af-e3816f172ea2
Extent
Latitude: 52.94650926° to 52.89568172°
Longitude: -4.174349091° to -3.993369947°
Spatial reference system
Dataset reference date
2001-08-29 (publication)
Frequency of update
Responsible party
Digital and Data Solutions, JNCC (custodian)
ISO 19139 resource type
dataset
Metadata language
eng
Source Metadata
XML
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