Evidence that higher [CO₂] increases tree growth sensitivity to temperature: a comparison of modern and paleo oaks.

ABSTRACT: To test tree growth sensitivity to temperature under different ambient CO₂ concentrations, we determined stem radial growth rates as they relate to variation in temperature during the last deglacial period, and compare these to modern tree growth rates as they relate to spatial variation in temperature across the modern species distributional range. Paleo oaks were sampled from Northern Missouri, USA and compared to a pollen-based, high-resolution paleo temperature reconstruction from Northern Illinois, USA. Growth data were from 53 paleo bur oak log cross sections collected in Missouri. These oaks were preserved in river and stream sediments and were radiocarbon-dated to a period of rapid climate change during the last deglaciation (10.5 and 13.3 cal kyr BP). Growth data from m

SUBMITTER: Voelker SL 

PROVIDER: S-EPMC6108346 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature