In:
Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 35, No. 3 ( 2005-03-01), p. 682-692
Abstract:
Trees and snags with diameter at breast height (dbh) ≥5 cm were measured in 1983, 1993, and 2003 on 117 plots, each having an area of 200-m 2 , in an 80-year-old forest in western Massachusetts. In 2003 we measured dead stumps and coarse woody debris (CWD) with diameter ≥10 cm using the line intercept method. Decadal mortality rates were 9.4% and 9.0% per decade (7.1 and 5.0 m 3 ·ha 1 , respectively). Mortality rates were highest (32%) in low-vigor suppressed trees. Snags with dbh 〉 10 cm occurred on 72% and 62% of plots, respectively, in 1983 and 2003. Snag volume decreased from 13.2 to 8.7 m 3 ·ha 1 over the 20-year period. From 1983 to 2003, 88% of a cohort of oak (Quercus spp.) snags, probably killed by gypsy moths (Lymantria dispar L.), had fallen. Decadal fall rates of snags averaged 61% and 66% (6.8 and 4.5 m 3 ·ha 1 , respectively). CWD logs were measured on 55% of plots and averaged 10.1 m 3 ·ha 1 . Stumps were on 62% of plots and averaged 0.7 m 3 ·ha 1 . Seventy percent of stumps, but only 38% of logs, were in the two most decayed classes. Trees cut the previous decade contributed 6% of CWD logs measured. Few snags were cut (1.6 and 0.4 m 3 ·ha 1 , respectively, in 19831993 and 19932003). Snag production and fall rates were higher than in other forests, but CWD volume was lower.
Type of Medium:
Online Resource
ISSN:
0045-5067
,
1208-6037
Language:
English
Publisher:
Canadian Science Publishing
Publication Date:
2005
detail.hit.zdb_id:
1473096-0
SSG:
23
SSG:
12
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