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Cumulative Carbon Fluxes Due to Selective Logging in Southeast Asia

机译：东南亚因选择性测井而产生的累积碳通量

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Selective logging creates a large amount of wood residues in forests in addition to producing a small amount of sawnwood for use as source of construction materials. Although accounting for carbon fluxes in harvested wood products (HWPs) becomes necessary in the fight against climate change, previous studies focused mainly on carbon fluxes in HWPs in temperate and boreal forests. This report attempts to analyze carbon fluxes in various wood components created by selective logging in production forest in Southeast Asia during a hypothetical period of carbon project implementation between 2015 and 2050 under conventional (CVL) and reduced-impact logging (RIL). Study results suggest that CVL produced about 146.6 (±5.4) million m3 annually. Logging created annual carbon fluxes of about 0.23, 0.23, 0.20, 0.69, and 0.15 MgC ha-1·year-1 in sawnwood, wood wastes at sawmills (SWW), wood product wastes due to logging damages remained in the forests (WPW), branches and top logs (BRA), and belowground dead root (BLD), respectively. Cumulative carbon fluxes were estimated at 281.0, 506.6, and 87.4 TgC year-1 in sawnwood, onsite (WPW, BRA, BLD), and offsite (SWW) pools, respectively. Except in SW, cumulative carbon fluxes in onsite and offsite pools showed a decline trend in about 10 years after logging. Switching from CVL to RIL could increase fluxes in sawnwood 60% higher than that under CVL, while reducing fluxes in short-lived onsite and offsite wood residues. Not only RIL can increase carbon fluxes in sawnwood, it can also increase production of sawnwood and retain more carbon in standing forests.
机译：选择性伐木除产生少量用作建筑材料来源的锯材外，还会在森林中产生大量木材残留物。尽管在应对气候变化中有必要对木材采伐产品中的碳通量进行核算，但先前的研究主要集中在温带和北方森林中的HWP中的碳通量。本报告试图分析在2015年至2050年间，在常规（CVL）和低影响伐木（RIL）下实施碳项目的假设期内，由东南亚生产林中的选择性伐木所产生的各种木材成分中的碳通量。研究结果表明，CVL每年生产约146.6（±5.4）百万立方米。伐木在锯材，锯木厂（SWW）的木材废物，伐木造成的木材产品废物（WPW）中产生的年碳通量约为0.23、0.23、0.20、0.69和0.15 MgC ha-1·year-1。 ，分支和最高原木（BRA）和地下死根（BLD）。在锯木，现场（WPW，BRA，BLD）和非现场（SWW）池中，第一年的累积碳通量估计分别为281.0、506.6和87.4 TgC。除西南部地区外，采伐后约10年内，场内和场外池的累积碳通量均呈下降趋势。从CVL切换到RIL可以使锯木中的通量比CVL下的通量高60％，同时减少短期的现场和异地木材残留物中的通量。 RIL不仅可以增加锯材中的碳通量，还可以提高锯材的产量并在林木中保留更多的碳。

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