1 / 28

Title

Monitoring the Biological Effects of Contamination in the Severn Estuary. David J Bird University of the West of England, Bristol. Title. Severn Estuary. The Severn Estuary & Bristol Channel. One of the four largest estuaries in the UK. Second highest tidal range in the world.

grace-guy
Download Presentation

Title

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Monitoring the Biological Effects of Contamination in the Severn Estuary David J Bird University of the West of England, Bristol Title

  2. Severn Estuary

  3. The Severn Estuary & Bristol Channel • One of the four largest estuaries in the UK • Second highest tidal range in the world • Internationally important for wading birds • Most significant estuary in the UK for elvers • Migratory corridor for endangered and vulnerable species of migratory fish

  4. Sea lamprey (Petromyzon marinus) River lamprey (Lampetra fluviatilis)

  5. Twaite shad (Alosa fallax) Allis shad (Alosa alosa)

  6. Sharpness Docks Swansea Peterstone Flats OLDBURY Port Talbot Avonmouth Cardiff SEVERN ESTUARY Bristol BRISTOL CHANNEL Nash Point Bedwin Sands HINKLEY National Monitoring Programme sites

  7. Monitoring fish abundance from power station water-intake screens

  8. Routes of uptake Fate Water column General body surface Metabolism Sediment Respiratory surfaces Excretion Food Ingestion Bioaccumulation Sources of contamination

  9. Baltic tellin Macoma balthica Ragworm Hediste diversicolor Brown shrimp Crangon crangon Common eel Anguilla anguilla Flounder Pleuronectes flesus

  10. Swansea Port Talbot Avonmouth Cardiff SEVERN ESTUARY Bristol BRISTOL CHANNEL 1-10kg 10-100kg >100kg Cd

  11. Swansea Port Talbot Avonmouth Cardiff SEVERN ESTUARY Bristol BRISTOL CHANNEL 0-100kg 100-1000kg >1000kg Cu

  12. Swansea Port Talbot Avonmouth Cardiff SEVERN ESTUARY Bristol BRISTOL CHANNEL 0-2 tonnes 2-4 tonnes >4 tonnes Zn

  13. Induction of metal-binding proteins Bioaccumulation Tissue damage & toxicity Exposure to metal contamination Biological effects of metals

  14. Exposure to metal contamination Biological effects of metals Induction of metal-binding proteins Bioaccumulation Tissue damage & toxicity

  15. Metals & metallothioneins in flounder livers

  16. Bioaccumulation of Cd in Crangon

  17. Formation of Phase 1 metabolites Induction of Phase I enzymes Induction of Phase II enzymes Formation of Phase II metabolites Exposure to organic contamination Biological effects of organic contaminants

  18. Exposure to organic contamination Biological effects of organic contaminants Formation of Phase 1 metabolites Induction of Phase I enzymes Induction of Phase II enzymes Formation of Phase II metabolites

  19. Excretion of bile metabolites Exposure to organic contamination Bile metabolites in fish Formation of Phase 1 metabolites Induction of Phase I enzymes Induction of Phase II enzymes Formation of Phase II metabolites

  20. (a) Standards 1600 7, 8D BaP 3-OH BaP 1-OH Phe 1500 1400 1-OH Chr Signal 1300 1-OH Pyr 1-OH BaP 1200 1100 1000 (b) Severn 1200 Signal 1100 1000 (c) Tyne 1400 1300 Signal 1200 1100 1000 10 15 20 25 30 Elution time (mins)

  21. Behavioural effects Growth & reproduction Endocrine & immune systems Mutagenesis & carinogenesis Tissue damage Biological effects of metabolites Metabolites

  22. Behavioural effects Growth & reproduction Endocrine & immune systems Mutagenesis & carinogenesis Tissue damage Biological effects of metabolites Metabolites

  23. Behavioural responses in Crangon

  24. Conclusions • Regular long-term monitoring is essential to establish temporal trends • A range of approaches at different levels of biological organisation is required • Developments in genomics & proteomics will change the way the effects of contamination are assessed and monitored

  25. Acknowledgements: FUNDING: Leverhulme Trust, Environment Agency, University of the West of England, British Ecological Society, The Fisheries Society of the U K SAMPLING:Oldbury & Hinkley power stations, Plymouth Marine Laboratory PEOPLE:Members of the Severn Estuary Research Group, including Dr Lyn Newton, Dr Jeanette Rotchell, Dr Sabine Duquesne, Dr Peter Ruddock & Dr Caroline Culshaw

More Related