Are calcium isotopes a reliable monitor of trophic level in marine settings?
Recent research has shown that calcium isotopes are fractionated by metabolic processes, leading to a decrease in 44Ca/40Ca ratio with increasing trophic level. If so, calcium isotopes could provide information on trophic relationships within foodwebs millions of years older than what we have been able to study thus far with alternative methods (i.e., nitrogen isotopes (δ15N), Sr/Ca). To explore whether δ 44Ca values provided marine trophic level information, we measured the δ44Ca composition...[Show more]
|Collections||ANU Research Publications|
|Source:||International Journal of Osteoarchaeology|