Intertidal Special Area of Conservation (SAC) Monitoring Menai Strait and Conwy Bay (2012): Evaluating Intertidal Seagrass Beds – Field Survey Versus Remote Sensing
Seagrass beds are of special interest in Wales as features under the Wildlife and Countryside Act 1981 (as amended), a Section 42 habitat under the NERC Act (2006), a subfeature of Special Areas of Conservation under the Habitats Regulations and is a biological quality element (marine angiosperms) under the Water Framework Directive. As such, it is crucial that a reliable method of evaluating the quality (extent, density and species richness) of the seagrass beds is used. Traditionally, field observations are made, and records of the presence and extent derived from mapping using a GPS. Until recent years, the resolution of aerial photographs, taken from aircraft, has not been high enough to differentiate seagrass beds, unless they are particularly dense, with clearly defined edges. Many of the intertidal seagrass beds in Wales are patchy and of low density (5-50% cover) and cannot be identified reliably from 1:5,000 aerial photographs. This study uses an unmanned aerial vehicle to take higher resolution images, by flying lower, along with GPS positions, allowing for the many images to be stitched together and be orthorectified. The two methods are compared, each one proving to have certain benefits and short-comings.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS116518
- Teitl Amgen
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- Ardal Cadwraeth Arbennig (ACA) rynglanwol yn monitro Afon Menai a Bae Conwy (2012): Gwerthuso gwelyau o wellt-y-gamlas rhynglanwol – arolwg maes yn erbyn synhwyro o bell
- Evaluating intertidal seagrass Zostera noltii beds – field survey vs remote sensing
- Laith Metadata
- English
- Datganiad
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These data are part of an annual program of monitoring of these particular seagrass beds from 2008 to 2012.
- Gwybodaeth ychwanegol
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Brazier, D. P. 2013. Evaluating intertidal seagrass Zostera noltii beds –field survey vs remote sensing. CCW Marine Monitoring Report No: 103, pp 16 + v, Countryside Council for Wales, Bangor.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2013-12-31
Ystod amser
- Dyddiad cychwyn
- 2012-10-05
- Dyddiad gorffen
- 2012-11-27
- Categori pwnc
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- Biota
- Imagery base maps earth cover
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
Maint Fertigol
- Maint allweddair MEDIN
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benthic boundary layer; water column boundary layer
Maint Fertigol
- Gwerth lleiaf
- 2
- Gwerth uchaf
- 7
- System Gyfeirio Cydlynu Fertigol
Dosbarthiad
- Fformat - Math a Disgrifiad
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Documents
()
- Math
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[A] Report Citation: Brazier, D. P. 2013. Evaluating intertidal seagrass Zostera noltii beds –field survey vs remote sensing. CCW Marine Monitoring Report No: 103, pp 16 + v, Countryside Council for Wales, Bangor. [B] GIS Data: TLafan 2012 Zos relocated.TAB and associated layers [C] Flight images in MapInfo and ArcMap and derived layers. [D] Images of the Zostera bed in the field.
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Documents
()
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
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These data are part of an annual program of monitoring of these particular seagrass beds from 2008 to 2012.
Allweddeiriau
Allweddair
Allweddair
- NRW Thesaurus
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- Traeth Lafan (Traeth Lavan)
- zostera noltii
- aerial surveys
- aerial photography (air photography) (aerial photographs)
- Menai Strait and Conwy Bay cSAC
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
Allweddair
- SeaDataNet Parameter Discovery Vocabulary
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- Macroalgae and seagrass taxonomy-related counts
- Math
- Theme
Dyfyniad
- Dyddiad (Adolygu)
- 2021-01-06
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
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
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There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
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© 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 .
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313136353138 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-05-31T09:40:21.748Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
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1.0