, Volume 171, Issue 1, pp 261–269 | Cite as

Influence of experimental snow removal on root and canopy physiology of sugar maple trees in a northern hardwood forest

  • Daniel P. Comerford
  • Paul G. SchabergEmail author
  • Pamela H. Templer
  • Anne M. Socci
  • John L. Campbell
  • Kimberly F. Wallin
Global change ecology - Original research


Due to projected increases in winter air temperatures in the northeastern USA over the next 100 years, the snowpack is expected to decrease in depth and duration, thereby increasing soil exposure to freezing air temperatures. To evaluate the potential physiological responses of sugar maple (Acer saccharum Marsh.) to a reduced snowpack, we measured root injury, foliar cation and carbohydrate concentrations, woody shoot carbohydrate levels, and terminal woody shoot lengths of trees in a snow manipulation experiment in New Hampshire, USA. Snow was removed from treatment plots for the first 6 weeks of winter for two consecutive years, resulting in lower soil temperatures to a depth of 50 cm for both winters compared to reference plots with an undisturbed snowpack. Visibly uninjured roots from trees in the snow removal plots had significantly higher (but sub-lethal) levels of relative electrolyte leakage than trees in the reference plots. Foliar calcium: aluminum (Al) molar ratios were significantly lower, and Al concentrations were significantly higher, in trees from snow removal plots than trees from reference plots. Snow removal also reduced terminal shoot growth and increased foliar starch concentrations. Our results are consistent with previous research implicating soil freezing as a cause of soil acidification that leads to soil cation imbalances, but are the first to show that this translates into altered foliar cation pools, and changes in soluble and structural carbon pools in trees. Increased soil freezing due to a reduced snowpack could exacerbate soil cation imbalances already caused by acidic deposition, and have widespread implications for forest health in the northeastern USA.


Soil freezing Root injury Woody shoot growth Carbohydrate and cation concentrations Acer saccharum 



The authors are grateful to Justin Brigham, C. J. Freeman, Meghan Gagne, Josh Halman, Chris Hansen, Glenn Harrington, Gary Hawley, Alexandra Kosiba, Chenin Limback, Paula Murakami, Erik Niebylski, Dan Ott, Sarah Pears, Matthew Ross, Bethel Steele, Phil Thompson, Alexandra Webster, Megan Yanney, Will Young, and Helen Yurchenco for their assistance in both the field and laboratory. We thank Alan Howard for assistance with statistical analyses and Drs. Abby van den Berg, David V. D’Amore, Brynne E. Lazarus and Kevin T. Smith for providing helpful feedback on an earlier version of this manuscript. We further thank the staff at the Hubbard Brook Experimental Forest for their generous help in all aspects of our sample collections. This research was supported by funds provided by the Forest Service Northern Research Station, the USDA CSREES McIntire-Stennis Forest Research Program, and the Andrew W. Mellon foundation. This manuscript is a contribution of the Hubbard Brook Ecosystem Study. Hubbard Brook is part of the Long-Term Ecological Research (LTER) network, which is supported by the National Science Foundation. The Hubbard Brook Experimental Forest is operated and maintained by the USDA Forest Service, Northern Research Station, Newtown Square, PA.


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Copyright information

© Springer-Verlag (outside the USA) 2012

Authors and Affiliations

  • Daniel P. Comerford
    • 1
  • Paul G. Schaberg
    • 2
    Email author
  • Pamela H. Templer
    • 3
  • Anne M. Socci
    • 3
  • John L. Campbell
    • 4
  • Kimberly F. Wallin
    • 1
    • 2
  1. 1.Rubenstein School of Environment and Natural ResourcesUniversity of VermontBurlingtonUSA
  2. 2.Northern Research Station Forest Service, US Department of AgricultureSouth BurlingtonUSA
  3. 3.Department of BiologyBoston UniversityBostonUSA
  4. 4.Northern Research StationForest Service, US Department of AgricultureDurhamUSA

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