Dull adnabod

Dynodydd

NRW_DS111145

Teitl Amgen

• Draft 2014 NRW/ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW16300000035
• Draft 2013 NRW/ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW16300000034
• Draft 2012 CCW/ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW16300000032
• 2010 CCW / ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW1630000002D
• 2009 CCW / ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW16300000020
• 2008 CCW / ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW16300000013
• Quadrat monitoring in Pembrokeshire Marine SAC
• Monitoring of tides-wept infralittoral and circalittoral rock in Pembrokeshire Marine SAC
• Monitro riff yn ACA Sir Benfro Forol

Laith Metadata

English

Datganiad

At each site quadrats were generally established in rows of 4 quadrats at 2 or 3 depths at each site. A standard recording methodology was devised to allow comparisons to be made of the data collected at any site in any year. 0.5m x 0.5m quadrats are attached to the permanent markers. An initial assessment of the distribution of species within the quadrat as a whole is made. The abundant/dominant species are recorded first followed by the rare and cryptic species using a series of timed cell frequency counts is then undertaken to assess species diversity. 4 successive counting periods of 5 minutes each is taken noting presence of species from within each cell. Counting continues until a total period of 20 minutes. Where species cannot be identified; specimens are collected from outside the quadrat and identified later. A photo is taken of the species in-situ. A specimen catalogue for the whole SAC is also collated. Where time allows either a video of the quadrat is made of images of the quadrat are taken. Still images have been captured from video for each cell and 'stitched' to make a single image of the whole quadrat. Detailed methodologies and descriptions and variations at specific sites can be found in Marine Monitoring Report 25b (standard operating procedures 15). The majority of QA occurs at Thorn Island and allows for a subset of quadrats to be surveyed and compared prior to the data collection exercise. This allows all surveyors to refresh their skills and ensure species id is consistent. A subset of all quadrats are either photographed or recorded using video and the images archived to allow quadrats to be re-evaluated if necessary. Temperature and/or salinity loggers are also continuously logging at most of these site. Sponge thickness measures are also taken at Warrior Site. Analysis of the quadrat data may also be carried out in PRIMER.

Dyddiad cyfeirnod y set ddata (Cyhoeddiad)

2010-09-23

Rhychwant

Rhychwant

Hyd

Irish Sea

Hyd

Celtic Sea

Hyd

St. Brides Bay

Hyd

Cardigan Bay

Hyd

SIR BENFRO - PEMBROKESHIRE

N

W

E

S

 

Dosbarthiad

Ansawdd

Allweddeiriau

System Cyfeirio Gofodol

Cynnwys

Cyfyngiadau