Climate Change Across Seasons Experiment (CCASE) at the Hubbard Brook Experimental Fine Root Damage

Root damage, as relative electrolyte leakage, was assessed following
winter freeze-thaw cycle experimental treatments in 2014 and 2015 on
all Climate Change Across Seasons Experiment (CCASE) plots. Reference
(or control) plots are shared with the collaborating Northern Forest
DroughtNet experiment. There are six plots total (each 11 x 14m). Two
are warmed 5 degrees C throughout the growing season (Plots 3 and 4).
Two others are warmed 5 degrees C in the growing season and have snow
removed during winter to induce soil freeze/thaw cycles (Plots 5 and
6). Four kilometers (2.5 mi) of heating cable are buried in the soil
to warm these four plots. Two additional plots serve as controls for
our experiment (Plots 1 and 2).

Analysis and results from these data are presented in Sanders-DeMott
2018.

These data were gathered as part of the Hubbard Brook Ecosystem Study
(HBES). The HBES is a collaborative effort at the Hubbard Brook
Experimental Forest, which is operated and maintained by the USDA
Forest Service, Northern Research Station.

Sanders-DeMott, R., Sorensen, P.O., Reinmann, A.B. et al. Growing
season warming and winter freeze–thaw cycles reduce root nitrogen
uptake capacity and increase soil solution nitrogen in a northern
forest ecosystem. Biogeochemistry 137, 337–349 (2018).
https://doi.org/10.1007/s10533-018-0422-5