Title:

Evaluation of physiological responses of balsam fir and red spruce trees growing in two pre-commercial thinned (PCT) and four never-pre-commercial thinned (N-PCT) sites in Maine, USA

Author(s):

Minocha, Rakesh; Long, Stephanie; Brissette, John C.; Wagner, Robert G.

Publication Year:

2021

How to Cite:

These data were collected using funding from the U.S. Government and can be used without additional permissions or fees. Before using these data in a publication, presentation, or other research product please contact Rakesh Minocha or Stephanie Long. If you use these data in a publication, presentation, or other research product please use the following citation:

Minocha, Rakesh; Long, Stephanie; Brissette, John C.; Wagner, Robert G. 2021. Evaluation of physiological responses of balsam fir and red spruce trees growing in two pre-commercial thinned (PCT) and four never-pre-commercial thinned (N-PCT) sites in Maine, USA. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2021-0078

Abstract:

These data contain biochemical parameters that were measured in foliage and sapwood of red spruce (Picea rubens) and balsam fir (Abies balsamea) trees growing at six sites in northern Maine that are part of Maine's Commercial Thinning Research Network (CTRN). Two different types of experiments were conducted by CTRN using a total of 12 sites. In one experiment, two removal intensities (33% and 50%) were applied to six sites at three different timings of entry for thinning (thin immediately, delay thinning by 5 year, or 10 years) that had been previously commercially thinned (PCT). In the second experiment various commercial thinning (CT) methods (low, crown, dominant) were applied at two removal intensities (33% and 50%) to six sites that had not been pre-commercially thinned (N-PCT). Pre-commercial thinning took place in 1983-1985. Commercial thinning treatments began in 2000. We collected samples from the two pre-commercial thinned (PCT) and four N-PCT CTRN sites. Depending upon the site, annual collections of foliage and sapwood were made 1 to 7 years after applying CT treatment. Fifteen randomly chosen red spruce and balsam fir trees were sampled from designated plots (61 meters x 61 meters). Foliar and sapwood data include free polyamines, free amino acids, and soluble ions analyzed by HPLC and ICP-OES. Chlorophyll and soluble protein data analyzed by UV/VIS spectrophotometry are also included for foliar samples. In total, there are 1500 foliar and 573 sapwood samples included in this dataset.

Keywords:

biota; environment; Ecology, Ecosystems, & Environment; Ecology; Landscape ecology; Plant ecology; Forest & Plant Health; Botany; Natural Resource Management & Use; amino acids; balsam fir; chlorophyll; crown type thinning; dominant type thinning; exchangeable ions; foliar physiology; low type thinning; metabolism; nutrients; polyamines; precommercial thinning; red spruce; soluble protein; Maine; Aroostook County; Oxford County; Penobscot County; Washington County; Penobscot Experimental Forest; Magalloway Plantation

Related publications:

• Ward, Jeffrey S. (ed.); Twery, Mark J. (ed.). 2004. Forestry across borders: Proceedings of the New England Society of American Foresters 84th winter meeting. General Technical Report. NE-314. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 2004 March 23-26; Quebec City, Canada; 44 p. https://doi.org/10.2737/NE-GTR-314
• Hiesl, Patrick; Crandall, Mindy S.; Weiskittel, Aaron; Benjamin, Jeffrey G.; Wagner, Robert G. 2017. Evaluating the long-term influence of alternative commercial thinning regimes and harvesting systems on projected net present value of precommercially thinned spruce–fir stands in northern Maine. Canadian Journal of Forest Research. 47: 203-214. https://doi.org/10.1139/cjfr-2016-0228
• Olson, Matthew G.; Meyer, Spencer R.; Wagner, Robert G.; Seymour, Robert S. 2014. Commercial thinning stimulates natural regeneration in spruce–fir stands. Canadian Journal of Forest Research. 44(3): 173-181. https://doi.org/10.1139/cjfr-2013-0227

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