Climate Change Across Seasons Experiment (CCASE) Sapling Study at the Hubbard Brook Experimental Forest: Growth and Litter

Litterfall production and stem growth of red maple and
sugar maple saplings were assessed as measures of aboveground
productivity in 2013 (to determine baseline values before
treatment was initiated) and in 2014 after saplings
experienced a combination of soil warming and winter
freeze-thaw cycles treatments. There were seven treatments
for each species of maple. For each species, ten saplings
experienced ambient temperatures (reference), ten experienced
growing season warming with no induced freeze-thaw cycles in
winter (warmed), ten in each of four groups experienced
warming in the growing season coupled with two, four, six, or
eight soil freeze-thaw cycles in winter (warmed + 2 FTC,
warmed + 4 FTC, warmed + 6 FTC, warmed + 8 FTC), and ten
experienced snow removal in winter with ambient temperatures
in the growing-season (snow removal). 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.