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Table 1 Total snagfall, pieces of wood (from the main stem), wood volume, and wood biomass in the Wind River Forest Dynamics Plot. Trees 1 ≤ DBH < 10 cm were not mapped and were assumed to have fallen as a single piece. Pieces with unknown dates reflect top pieces of still-living trees that were comprehensively sampled beginning in 2017. “Pre Estab.” indicates deadwood on the ground at plot establishment in 2010–2011

From: The importance of large-diameter trees to the creation of snag and deadwood biomass

  Diameter class Year Total
Pre Estab. 2012 2013 2014 2015 2016 2017 2018 2019 Unkn. Date
Newly fallen trees and snagsa 1 cm ≤ DBH < 10 cm 17 4 51 39 59 120 283 602 377 0 1552
10 cm ≤ DBH < 60 cm 3211 27 57 25 35 79 137 114 77 0 3762
≥60 cm DBH 483 3 9 7 4 14 12 8 6 0 546
New pieces of deadwoodb 1 cm ≤ DBH < 10 cm 27 4 51 39 59 121 283 602 384 11 1581
10 cm ≤ DBH < 60 cm 3887 39 66 40 53 132 168 131 98 509 5123
≥60 cm DBH 594 6 21 14 5 79 15 14 10 420 1178
Volume (m3) 1 cm ≤ DBH < 10 cm 0.80 0.02 0.14 0.12 0.19 0.45 0.65 1.54 1.19 2.44 7.54
10 cm ≤ DBH < 60 cm 2111.23 10.07 23.57 11.98 27.84 48.15 77.92 37.31 20.19 185.11 2553.37
≥60 cm DBH 1955.00 44.73 62.70 89.89 13.50 217.91 117.22 74.05 73.60 676.94 3325.54
Biomass (Mg) 1 cm ≤ DBH < 10 cm 0.35 0.01 0.06 0.04 0.06 0.19 0.28 0.75 0.65 0.01 2.40
10 cm ≤ DBH < 60 cm 1010.05 4.53 10.09 6.56 6.73 20.40 34.81 17.45 13.57 60.54 1184.73
≥60 cm DBH 959.14 15.70 29.60 43.91 6.16 140.63 53.76 34.54 34.61 299.17 1617.22
  1. aTrees and snags that fell with the remaining stump <1.37 m tall (including 44 subsequently measured <10 cm diameter)
  2. bExplicitly mapped pieces of wood ≥10 cm diameter and ≥1 m long and non-mapped pieces of wood from trees 1 ≤ DBH < 10 cm, with those smaller trees assumed to have fallen as one piece (see the “Materials and methods” section). These reflect the number of pieces into which trees and snags fell, as well as fallen pieces of standing trees