The Abundance and Distribution of Waterfowl Within Milford Haven After the Sea Empress Oil Spill
This study was put in place to assess whether the oil spill was to impact the nationally important waterfowl populations found in the area of Milford Haven. Two polluted (Angle Bay and Pembroke River) and two relatively unpolluted 'control' sites (the Carew/Cresswell and Cleddau Rivers) were monitored intensively over the three winters after the oil spill. The four sites have been monitored following standard Wetland Bird Survey (WeBS) methodology to assess the numbers of waterfowl present, and following standard British Trust for Ornithology all-day (across the tidal cycle) count methodology to assess the feeding areas most used. The data was captured to assess the impact of the Sea Empress oil spill on waterfowl populations in the Milford Haven area. Counts during winter took place between November and March as the estuary is most important for birds during the winter period. The migration and early autumn periods have been excluded because numbers of birds can fluctuate widely from year to year, for reasons not associated with the estuary. Each site was counted twice a month with one count on a spring tide and one on a neap tide where possible. In the first year, only one count was carried out at each site in November. Historical data was used from 1982-1999.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS110120
- Teitl Amgen
-
- Toreithrwydd a dosbarthiad adar dr yn Aberdaugleddau ar ol gollyngiad olew'r Sea Empress
- Laith Metadata
- English
- Datganiad
-
This study monitored the use made by waterbirds of intertidal areas in the Cleddau Estuary over three winter seasons, in relation to oiling levels. Four sites were studied: - a heavily oiled site, Angle Bay; - a moderately oiled site, Pembroke River, and - two effectively non-oiled sites, the Carew/Cresswell rivers and the 'Upper Cleddau', where the Eastern and Western Cleddau meet. The species recorded include divers, grebes, cormorants, herons, wildfowl, waders and auks. In order to monitor all species comprehensively, an area of open water was also counted at each site. In order to gain a full picture of the use of the four intertidal areas by waterfowl and other birds, counts were carried out across the tidal cycle. This choice of methodology allows the most important feeding areas to be identified. Each site was counted once every hour from six hours before to five hours after low tide. Increased monitoring efforts and impact assessment following the Sea Empress oil spill.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2000-10-31
Ystod amser
- Dyddiad cychwyn
- 1984-10-31
- Dyddiad gorffen
- 1999-11-30
- Categori pwnc
-
- Biota
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
Maint Fertigol
- Maint allweddair MEDIN
-
benthic boundary layer
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Documents
Documents
()
- Math
-
[A] Report (MS word, pdf-format, WordPerfect)
-
Documents
Documents
()
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
-
This study monitored the use made by waterbirds of intertidal areas in the Cleddau Estuary over three winter seasons, in relation to oiling levels. Four sites were studied: - a heavily oiled site, Angle Bay; - a moderately oiled site, Pembroke River, and - two effectively non-oiled sites, the Carew/Cresswell rivers and the 'Upper Cleddau', where the Eastern and Western Cleddau meet. The species recorded include divers, grebes, cormorants, herons, wildfowl, waders and auks. In order to monitor all species comprehensively, an area of open water was also counted at each site. In order to gain a full picture of the use of the four intertidal areas by waterfowl and other birds, counts were carried out across the tidal cycle. This choice of methodology allows the most important feeding areas to be identified. Each site was counted once every hour from six hours before to five hours after low tide. Increased monitoring efforts and impact assessment following the Sea Empress oil spill.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
- NRW Thesaurus
-
- distributions
- waterfowl
- Milford Haven
- Sea Empress
- oil pollution
- pollution (see also specific types of pollution eg. oil pollution)
- Angle Bay
- Carew and Cresswell Rivers
- river Cleddau
- Wetland Bird Survey (WeBS)
- British Trust for Ornithology (BTO)
- marine and freshwater inventory
- river Pembroke
- abundance
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
Allweddair
- SeaDataNet Parameter Discovery Vocabulary
-
- Bird taxonomy-related abundance per unit area of surface
- Math
- Theme
Dyfyniad
- Dyddiad (Adolygu)
- 2021-01-06
Allweddair
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
-
The abundance and distribution of waterfowl within Milford Haven after the Sea Empress oil spill, year 1 report
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 1997. 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
- 4f4c4942-4343-5764-6473-313130313230 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-05-31T09:37:45.542Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0