Dead wood offsets the reduced live wood carbon stock in forests over 50?years after a stand-replacing wind disturbance
Dead wood offsets the reduced live wood carbon stock in forests over 50?years after a stand-replacing wind disturbance
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枯木抵消了林分更换风扰后 50 多年森林中活木碳储量的减少
DOI：
10.1016/j.foreco.2018.08.054
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发表时间：
2019
影响因子：
3.7
通讯作者：
Suzuki Jun-Ichirou
中科院分区：
文献类型：
--
作者：
Suzuki Satoshi N.;Tsunoda Tomonori;Nishimura Naoyuki;Morimoto Junko;Suzuki Jun-Ichirou
在森林中，风的扰动经常产生大量的枯死的木质材料。然而，干扰后，抢救性采伐大大减少了死木质材料的数量，从而减少了碳储存。由于死亡的木质材料可以持续很长一段时间的粗木质残体（CWD）在寒冷的气候地区，如寒带和亚高山森林，抢救性采伐可能会对受干扰的森林碳储量的长期影响。在这项研究中，我们研究了1959年的超级台风和随后的抢救性采伐对亚高山森林碳储量的影响超过半个世纪后，在日本中部的干扰。我们采样干扰和未打捞（未打捞）的立场与干扰和打捞的立场在10年内的干扰（打捞），除了未受干扰的立场（未受干扰）。CWD的体积是较高的未打捞的立场比其他两种类型的森林。具体而言，具有中间衰变的类别的数量非常高，导致未打捞的林分中CWD的碳储量更大。虽然未受干扰林分中活树的碳储量高于受干扰林分（未打捞和打捞），但未打捞林分的总碳储量（活+死）（104 Mg C ha−1）几乎相当于未受干扰林分（99 Mg C ha−1），远高于打捞林分（72 Mg C ha−1）。这项研究表明，由台风产生的CWD作为一个大的碳储量超过半个世纪，潜在的抵消了受干扰的森林活的木质生物量的损失。
Windthrow disturbances often produce large amounts of dead woody materials in a forest. However, post-disturbance, salvage logging greatly reduces the amount of dead woody materials, and thus, carbon stocks. Because the dead woody materials can persist as coarse woody debris (CWD) for a very long time in cool climatic areas, such as boreal and subalpine forests, salvage logging might have long-term effects on the carbon stocks of disturbed forests. In this study, we examined the effects of windthrow by a super typhoon in 1959 and subsequent salvage logging on the carbon stock of subalpine forests more than a half-century after the disturbance in central Japan. We sampled disturbed and not salvaged (unsalvaged) stands versus disturbed and salvaged stands within 10 years of the disturbance (salvaged) in addition to undisturbed stands (undisturbed). The volume of CWD was higher in the unsalvaged stands versus the other two types of forests. Specifically, the volume of classes with intermediate decay was very high, contributing to greater carbon stocks of CWD in the unsalvaged stands. Although the carbon stock of living trees was higher in the undisturbed stands compared to the disturbed stands (unsalvaged and salvaged), the total carbon stock (live + dead) of the unsalvaged stands (104 Mg C ha−1) was almost equivalent to that of the undisturbed stands (99 Mg C ha−1) and was much higher than that of the salvaged stands (72 Mg C ha−1). This study demonstrates that CWD produced by a typhoon acts as a large carbon stock for more than a half-century, potentially offsetting the loss of live woody biomass in disturbed forests.