A survey to determine the status of the Depressed River Mussel Pseudanodonta complanata at eight monitoring stations within the River Wye (Lower Wye) SSSI in 2022
Data from a survey of the River Wye taken over a 3 day period from August 17th - 19th 2022. Sampling methodology followed that established in the previous survey in 2007, with eight monitoring sites visited from Backney Common (north of Ross-on-Wye) downstream to Bigsweir covering a 50km stretch of the River Wye. At each site, 60-minute visual surveys were undertaken in the river using a bathyscope to spot mussels buried in sediments or dislodged from them using a pronged rake. The number of mussels located during that period were counted, measured, photographed and then returned to the river.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS161313
- Laith Metadata
- English
- Datganiad
-
Experience gained by the contractor during the 2007 P. complanata survey were adopted to take account of the particular behaviours of the mussel in the Lower Wye. These included their relative scarcity, patchy distribution and habit of living deeply buried (often in small groups) in coarse sand between gravel and cobbles. Search technique involved the use of a bathyscope (‘glass-bottomed bucket’) to visually search the riverbed whilst wading in water depths to about 1.2m whilst wearing chest waders and a flotation aid.
- Gwybodaeth ychwanegol
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Willing, M.J. 2024. A survey to determine the status of the Depressed River Mussel Pseudanodonta complanata at eight monitoring stations within the River Wye (Lower Wye) SSSI in 2022. NRW Evidence Report No. 846. 47pp. Natural Resources Wales, Bangor.
- Dyddiad cyfeirnod y set ddata (Creu)
- 2024-11-01
Ystod amser
- Dyddiad cychwyn
- 2024-08-17
- Dyddiad gorffen
- 2024-08-19
- Categori pwnc
-
- Biota
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Delimited
(
)
- Math
-
Data Stored on WID Database
-
Delimited
(
)
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Cydymffurfiad
- 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
- Eglurhad
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This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Gradd
- false
- Datganiad
-
Experience gained by the contractor during the 2007 P. complanata survey were adopted to take account of the particular behaviours of the mussel in the Lower Wye. These included their relative scarcity, patchy distribution and habit of living deeply buried (often in small groups) in coarse sand between gravel and cobbles. Search technique involved the use of a bathyscope (‘glass-bottomed bucket’) to visually search the riverbed whilst wading in water depths to about 1.2m whilst wearing chest waders and a flotation aid.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
-
NRW Thesaurus
-
- mussels
- River Wye (Afon Gwy)
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2025-01-08
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- noLimitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
-
There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
-
© CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
Datganiad Priodoli
- Cyfyngiadau eraill
-
Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
Math o Drwydded
- Cyfyngiadau eraill
- Open Government Licence