Past climate changes and ecophysiological responses recorded in the isotope ratios of saguaro cactus spines
@article{English2007PastCC, title={Past climate changes and ecophysiological responses recorded in the isotope ratios of saguaro cactus spines}, author={Nathan B English and David L. Dettman and Darren R. Sandquist and David G. Williams}, journal={Oecologia}, year={2007}, volume={154}, pages={247-258} }
The stable isotope composition of spines produced serially from the apex of columnar cacti has the potential to be used as a record of changes in climate and physiology. To investigate this potential, we measured the δ18O, δ13C and F14C values of spines from a long-lived columnar cactus, saguaro (Carnegiea gigantea). To determine plant age, we collected spines at 11 different heights along one rib from the stem apex (3.77 m height) to the base of a naturally occurring saguaro. Fractions of…
34 Citations
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