Partial harvesting (here defined as removal of ≤50% of preharvest volume) is the predominant silvicultural scheme applied to hardwood forest types in the eastern United States. Future stand conditions are largely reliant on trees retained after harvest, so their mortality because of harvesting activity damage should be minimized or taken into account when planning. We quantify partially harvested stand characteristics and postharvest mortality using data from 32,057 forested conditions, 366,953 trees with a diameter at breast height (dbh) ≥ 2.5 cm, of which 4,469 trees were cut and used in partially harvested stands. On average 23.3% of stand volume was selectively harvested with an additional 2.5% of volume lost to harvesting-caused mortality. Of the trees killed by logging activity in harvested stands, 90.7% were under 28 cm dbh. The likelihood of mortality was 1.31 times higher (95% CI of 1.20 to 1.44) for trees retained in stands that had undergone partial harvesting than for trees growing in unharvested stands. Commercial species had lower odds of mortality (0.88 times) in harvested stands than noncommercial species. Residual trees in harvested stands on private lands had a higher probability of mortality (1.23 times) than those on harvested public lands.

中文翻译：

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使用长期森林清单数据评估采伐硬木林分的树木死亡率概率

部分采伐（此处定义为采伐前采伐量≤50%）是适用于美国东部阔叶林类型的主要造林方案。未来的林分条件很大程度上依赖于采伐后保留的树木，因此在规划时应尽量减少或考虑因采伐活动损害而导致的死亡。我们使用来自 32,057 个森林条件、366,953 棵胸高 (dbh) ≥ 2.5 cm 的树木的数据来量化部分采伐的林分特征和采后死亡率，其中 4,469 棵树被砍伐并用于部分采伐的林分。平均 23.3% 的林分体积被选择性收割，另外 2.5% 的林分体积因收割导致的死亡而损失。在采伐林中因伐木活动而死亡的树木中，90.7% 的树木的 dbh 低于 28 cm。保留在经过部分采伐的林分中的树木的死亡可能性是未采伐林分中的树木的 1.31 倍（95% CI 为 1.20 至 1.44）。商业物种在收获林分中的死亡率比非商业物种低（0.88 倍）。私有土地上的采伐林中的剩余树木的死亡率（1.23 倍）高于采伐的公共土地上的树木。