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Hi Mat, It certainly is an area that could use more study. I could point you to various more general fishy isotope studies, but for the deforestation/nutrient inflow question sulphur is probably the element to watch, alongside the more well-established nitrogen and carbon. Are you thinking of modern ecological papers or archaeological studies? For the latter (with some modern data too), a recent paper on North Sea cod in Rapid Communications in Mass Spectroscopy (Nehlich/Barrett/Richards 2013 - don't have full ref as writing from phone) is a good starting point. Would be interested to hear of any similar work out there! We have some more cod data in the pipeline too (C,N, and S) which may or may not prove useful for that particular issue. Best, David On 29 Oct 2013, at 08:36, "Matthew Campbell" <[log in to unmask]<mailto:[log in to unmask]>> wrote: Hi all A colleague asked me if I knew of any isotopic studies of fish bone, particularly looking at changes in diet due to changing nutrient flows following changes in land cover such as deforestation. Sounds like the sort of study that if it hasn't been done, then someone should do it. But any help gratefully received. Cheers Mat ****************************** Matthew Campbell CFG Heritage Ltd PO Box 10 015 Dominion Road Auckland 1024 ph: 09 309 2426 mobile: 021 437 555 www.cfgheritage.com<http://www.cfgheritage.com/>