Intertidal Monitoring of Rocky Reefs in Milford Haven, Pembrokeshire Marine Special Areas of Conservation (SACs) 2005
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 former Countryside Council for Wales (CCW), now forming part of Natural Resources Wales (NRW) is therefore required to report on a regular basis on whether features are in favourable conservation status. The aim of this data capture was to establish a set of permanent monitoring sites representative of the rocky shore intertidal habitats within the Haven Waterway in order to implement a long-term monitoring programme. The purpose of this data capture and project was to collect and present baseline data on the current status of six sites within the Milford Haven waterway for future comparisons of distribution and abundance of rocky shore organisms. As part of the Pembrokeshire Marine SAC, monitoring of the Haven waterway is required to provide regular reporting on the condition of the Habitats Directive features within the SAC.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS101997
- Teitl Amgen
-
- 2005 CCW HABMAP sublittoral survey MRCCW16900000002
- 2005 CCW / IECS Pembrokeshire Marine SAC Milford Haven rocky reef monitoring MRCCW30200000018
- Monitro Rhynglanwol: Riffiau Creigiog yn Aberdaugleddau, ACA Sir Benfro Forol
- Laith Metadata
- English
- Datganiad
-
This dataset contains the results of a baseline survey of fixed quadrats across six rocky shore sites within the Milford Haven waterway in July 2005. The sites were chosen to represent an environmental gradient along the Haven in terms of salinity and wave exposure to mirror transects established by OPRU in 1995. However site selection was limited by the need to select sites that had suitable bedrock for permanent marking, reliable and reasonable access and suitable habitat throughout the shore. At each site samples were taken from three different shore heights- upper shore, middle shore and lower shore. Within each shore zone four 1m x 1m quadrats were permanently marked (placed in homogenous areas of inclined rock where possible, avoiding rock pools and large fissures). Photographs were taken of all quadrats and a habitat map produced to facilitate relocation. Within each 1m2 quadrat presence/absence data were recorded for all species using a 25 cell grid. This gave a frequency score of between 0 and 25 for each species. Organisms were identified to species level where possible with specimens being returned to the laboratory for verification where necessary. Species within the following taxa were aggregated for cell counts: barnacles, limpets, flat winkles, rough winkles, amphipods, Verrucaria spp (except Verrucaria mucosa). Further data were captured at the six sites via limpet counts, limpet population profile, barnacle species abundance, barnacle abundance, collection of small molluscs and crustacea and Ascophyllum nodosum population structure. The current survey provides baseline data for future comparisons. Data from previous surveys exist for five of the six sites, however previous monitoring was generally in the form of transect surveys using SACFOR abundance assessment (which has less resolution for detection of population change). As a consequence, results from these studies are not directly comparable to the data collected from this set of surveys.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2008-12-31
Ystod amser
- Dyddiad cychwyn
- 2005-07-23
- Dyddiad gorffen
- 2005-07-27
- Categori pwnc
-
- Biota
Rhychwant
Rhychwant
- Hyd
- SIR BENFRO - PEMBROKESHIRE
- Hyd
- Wales (WLS)
))
Maint Fertigol
- Maint allweddair MEDIN
-
benthic boundary layer
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Documents
Documents
()
- Math
-
[A] Digital versions of the contract report and 'site relocation sheets': Microsoft Word document(s); and an equivalent Adobe Portable Document Format version [B] MapInfo GIS layer in MapInfo Native format (Tables): - Locations of sites and quadrat stations. - Translations from the above MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats. [C] Excel spreadsheet of species records for each survey site, station and replicate quadrat. [D] Photographs from each survey site, quadrats and barnacle quadrats. [E] Image files of field drawings and relocation sketches. [F] Marine Recorder file: MRCCW30200000018 [G] Arcview layers available in Y:\Marine\Intertidal_SAC_Monitoring\Pembrokeshire Marine SAC Monitoring.gdb
-
Documents
Documents
()
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
-
This dataset contains the results of a baseline survey of fixed quadrats across six rocky shore sites within the Milford Haven waterway in July 2005. The sites were chosen to represent an environmental gradient along the Haven in terms of salinity and wave exposure to mirror transects established by OPRU in 1995. However site selection was limited by the need to select sites that had suitable bedrock for permanent marking, reliable and reasonable access and suitable habitat throughout the shore. At each site samples were taken from three different shore heights- upper shore, middle shore and lower shore. Within each shore zone four 1m x 1m quadrats were permanently marked (placed in homogenous areas of inclined rock where possible, avoiding rock pools and large fissures). Photographs were taken of all quadrats and a habitat map produced to facilitate relocation. Within each 1m2 quadrat presence/absence data were recorded for all species using a 25 cell grid. This gave a frequency score of between 0 and 25 for each species. Organisms were identified to species level where possible with specimens being returned to the laboratory for verification where necessary. Species within the following taxa were aggregated for cell counts: barnacles, limpets, flat winkles, rough winkles, amphipods, Verrucaria spp (except Verrucaria mucosa). Further data were captured at the six sites via limpet counts, limpet population profile, barnacle species abundance, barnacle abundance, collection of small molluscs and crustacea and Ascophyllum nodosum population structure. The current survey provides baseline data for future comparisons. Data from previous surveys exist for five of the six sites, however previous monitoring was generally in the form of transect surveys using SACFOR abundance assessment (which has less resolution for detection of population change). As a consequence, results from these studies are not directly comparable to the data collected from this set of surveys.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
- NRW Thesaurus
-
- Pembrokeshire Marine SAC
- Milford Haven
- Pembroke Ferry
- Hazelbeach
- Monk Haven
- South Hook Point
- West Angle Bay
- Lawrenny Quay
- marine biology (subtidal biology) (littoral biology) (sublittoral biology)(intertidal biology)(see also seashore)
- Special Areas of Conservation (SAC) - SAC monitoring
- reef
- rocky shore
- quadrats
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
Allweddair
- SeaDataNet Parameter Discovery Vocabulary
-
- Zoobenthos taxonomic abundance
- Zoobenthos taxonomy-related counts
- Habitat characterisation
- Math
- Theme
Dyfyniad
- Dyddiad (Adolygu)
- 2021-01-06
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
-
Intertidal monitoring of rocky reefs in Milford Haven, Pembrokeshire Marine SAC in 2005
Cyfyngiadau
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 2008. 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
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313031393937 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
- 2024-05-31T09:27:39.167Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0