Invertebrates Recorded on Exposed Riverine Sediments at Llanelltyd on the Afon Mawddach in 2016.
In order to alleviate flooding problems on the Afon Mawddach at Llanelltyd, Natural Resources Wales is considering the removal of gravel from shingle bars immediately upstream and downstream of the bridge. Data was collected to evaluate the current significance of these bars for Exposed Riverine Sediments invertebrates and to indicate the possible impact of gravel removal on the Exposed Riverine Sediments fauna. This dataset holds specialist invertebrate species of Exposed Riverine Sediments recorded on three dates in July and September 2016. Comparisons are made with a similar survey carried out on the Tan-lan bar in 2003 and Exposed Riverine Sediment Quality Indices are presented. Unseasonal floods during August and September may have limited the range of species, but it would also appear that changes to the topography of the Tan-lan (upstream) sediment bar may also be responsible for limiting the area of habitat. The current survey did not yield sufficient species to allow a reliable index to be calculated but there is no reason to suppose that the Llanelltyd shingle bars are no longer important to the Exposed Riverine Sediments assemblage on the river.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS116796
- Teitl Amgen
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- Creaduriaid Di-asgwrn-cefn a Gofnodwyd ar Waddodion Afonol Agored yn Llanelltud ar Afon Mawddach yn 2016
- The importance of exposed riverine sediments at Llanelltyd on the Afon Mawddach for invertebrates in 2016.
- Laith Metadata
- English
- Datganiad
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Sampling techniques included visual searches, splash-sampling and excavation sampling. Invertebrate identifications were by a competent taxonomist.
- Gwybodaeth ychwanegol
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Fowles, A.P. (2016), The importance of exposed riverine sediments at Llanelltyd on the Afon Mawddach for invertebrates in 2016, NRW Evidence Report No: 182, 21pp, Natural Resources Wales, Bangor.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2016-12-31
Rhychwant
Rhychwant
- Hyd
- GWYNEDD - GWYNEDD
))
Dosbarthiad
Dosbarthiad
- Fformat - Math a Disgrifiad
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-
Database
()
- Math
-
[A] Published report – electronic version (Microsoft Word and Adobe PDF formats) [B] Species records, which are held on the NRW Recorder 6 database (Welsh Invertebrate Database)
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Database
()
- Lleolwr Adnoddau
-
Data Download
World Wide Web page
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
-
Sampling techniques included visual searches, splash-sampling and excavation sampling. Invertebrate identifications were by a competent taxonomist.
Allweddeiriau
Allweddair
Allweddair
- NRW Thesaurus
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- Exposed Riverine Sediment (ERS)
- rove beetles
- staphylinidae
- invertebrate surveys
- invertebrates (see also specific species)
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
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The importance of exposed riverine sediments at Llanelltyd on the Afon Mawddach for invertebrates in 2016
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
-
© 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
- Open Government Licence (OGL)
Math o Drwydded
- Cyfyngiadau eraill
- Open Government Licence (OGL)
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313136373936 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-05-31T09:39:37.135Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
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