4f4c4942-4343-5764-6473-313134393434
eng
dataset
Natural Resources Wales (NRW)
0300 065 3000
Maes-y-Ffynnon
LL57 2DW
enquiries@naturalresourceswales.gov.uk
pointOfContact
2018-07-03
MEDIN Discovery Metadata Standard
Version 2.3.8
urn:ogc:def:crs:EPSG::BNG
OGP
Intertidal Monitoring of Sediment Communities in Carmarthen Bay and Estuaries Special Areas of Conservation (SACs) 2009
Gwaith Monitro Rhynglwnaol ar Gymunedau Gwaddodion yn ACA Bae Caerfyrddin ac Aberoedd 2009
2009 CCW / ASML Carmarthen Bay and Estuaries SAC transect survey MRCCW16300000024
2012-06-30
publication
2012-06-26
revision
114944
https://naturalresources.wales
The Habitats Directive establishes that the management of Special Areas of Conservation (SACs) should aim to achieve the favourable conservation status of habitat and species features listed within its Annex I and Annex II. For SACs in Wales, the Countryside Council for Wales (CCW) is therefore required to report on a regular basis on whether features are in favourable conservation status. Carmarthen Bay SAC was designated for five Annex I intertidal habitat features: Estuaries; Mudflats and sandflats not covered by seawater at low tide; Large shallow inlets and bays; Salicornia and other annuals colonising mud and sand; Atlantic salt meadows (Glauco- Puccinellietalia maritimae). Specific areas of interest include the range of intertidal sediment communities in the bay and the monit
oring aimed to collect core samples along transects established in previous years. Data is captured to support reporting on conservation status of the piddock feature. All survey completed by professional and experienced marine field surveyors. Data quality and confidence considered high. Piddocks can be described as a biotope that occurs on circalittoral soft rock, such as soft chalk or clay, most often in moderately exposed tide-swept conditions. As soft chalk and firm clay are often too soft for sessile filter-feeding animals to attach and thrive in large numbers, an extremely impoverished epifauna results on upward-facing surfaces, although vertical faces may be somewhat richer. The rock is sufficiently soft to be bored by bivalves.
Natural Resources Wales (NRW)
0300 065 3000
Maes-y-Ffynnon
LL57 2DW
enquiries@naturalresourceswales.gov.uk
custodian
Countryside Council for Wales (CCW). Marine and Freshwater Ecosystems Group
01248 38550
Maes y Ffynnon
LL57 2DW
enquiries@ccw.gov.uk
originator
Aquatic Survey and Monitoring Ltd (ASML)
01388 528 015
Whitfield Brow
DL13 2SZ
tom@aquatic-environments.co.uk
originator
notPlanned
Documents
Species distribution
Habitats and biotopes
GEMET - INSPIRE themes, version 1.0
2022-02-05
publication
Zoobenthos taxonomy-related counts
Habitat characterisation
SeaDataNet Parameter Discovery Vocabulary
2011-03-25
publication
Marine Environmental Data and Information Network
© CNC/NRW and © Crown copyright 2012. All rights reserved. Natural Resources Wales, 100019741 Third parties seeking to re-use this data require a Licence issued by NRW. It allows re-use, reproduction and dissemination in any format or medium but only for non-commercial purposes, according to the terms and conditions of the Licence. Those seeking commercial re-use require a commercial licence available from the OS.
otherRestrictions
The following data is considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. NRW may release, publish or disseminate this data freely; providing recipients are made aware of use restrictions (See general use restrictions).
eng
biota
SeaVoX Vertical Co-ordinate Coverages
2010-05-18
publication
benthic boundary layer
-4.42229782
-4.13213629
51.62046149
51.77545830
2009-09-20
2009-09-22
Natural Resources Wales (NRW)
0300 065 3000
Maes-y-Ffynnon
LL57 2DW
enquiries@naturalresourceswales.gov.uk
distributor
dataset
Two transects were sampled using criteria for the Water Framework infaunal quality index tool. The sampling is currently 3 x replicates at 5 stations in each location. Three replicate cores (0.1 m2) and a sample for Particle Size Analysis were collected at five stations, located by GPS, on each transect. The cores were sieved in situ, using a 0.5 mm sieve, and the species present were recorded. A list was also made of species conspicuous at the sediment surface within a 5 m radius of the sample station. The percentage cover of standing water, the depth of the black layer, and a brief description of the station was also recorded. Twenty transects were established in 2004 mainly covering sediment biotopes but also including some rocky habitats. The transect surv
ey has only been completed once, although core sampling has been repeated at some of the locations. In 2008, numerous stations were revisited, but since then, only Crofty and Llansteffan, both of which were included in the original survey, have been revisited due to limited resources for collecting samples.