Presentation about my PhD research, given at the bivalve workshop in Brussels in May 2009.

1. Seasonal stable isotope composition of bivalve growth increments and ambient water in the rivers Rhine and Meuse Emma Versteegh Hubert Vonhof, Simon Troelstra, Dick Kroon

4. δ 18 O rivers Snow melt High discharge Flood Dry summer

6. Monitoring experiment: collecting and tagging Unionids

7. Monitoring experiment: cages in fish ladders

8. Monitoring locations

11. Predicted shell δ 18 O Meuse Lek (Rhine distributary)

12. δ 13 C of HCO 3 -

13. Shell  18 O records

14. Shell  13 C records

15. Matching shell and water records

16. Matching shell and water records

17. Intra-seasonal growth

19. Thank you!