I am working on applications of stable isotope data (O-18 and
C-13) to paleoclimatic/paleoenvironmental reconstruction from
lake sediments in southern Ontario. I have some questions
regarding the use of mollusc shells for isotope analysis.
The aquatic molluscs I am going to use are Valvata sincera and
1. Usually how many miligrams of shells are needed for the
analysis? And will different amounts used give different
2. Any preference regarding the mollusc ecology for using
as isotope analysing materials? e.g., shallow vs. deep water
species, still vs. moving water species, etc.?
3. Any preference regarding the size in one species? Will
small and large individuals give different results due to
their ages or habitats?
Any suggestions or references would be greatly appreciated.
Zicheng Yu, Department of Botany, Royal Ontario Museum, Toronto, ON M5S 2C6
[log in to unmask]; Fax: (416) 586-5516; Phone: (416) 586-5609