Stronger effects of termites than microbes on wood decomposition in a subtropical forest

Stronger effects of termites than microbes on wood decomposition in a subtropical forest
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白蚁对亚热带森林木材分解的影响比微生物更强

DOI:
10.1016/j.foreco.2021.119263
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发表时间:
2021-08
影响因子:
3.7
通讯作者:
Wang G. Geoff
Wang G. Geoff
中科院分区:
农林科学1区
文献类型:
--
作者:
Wu Chunsheng;Ulyshen Michael D;Shu Chunjie;Zhang Zhijian;Zhang Yi;Liu Yuanqiu;Wang G. Geoff

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枯木含有森林总碳的相当大的比例,其分解将有机碳转移到大气、其他生物和土壤中。微生物传统上被认为是全球木材分解的主要驱动力,但很少有研究测试白蚁对这一过程的相对重要性。本研究的目的是比较的相对贡献的微生物和白蚁木材(肉桂)分解进行了现场试验,白蚁访问(有和没有白蚁排除)和土壤接触(有和没有土壤接触)处理在中国亚热带地区。经过两年的时间,白蚁负责估计55.7%和48.9%的观察到的木材损失与土壤接触和不接触的木块,分别。与土壤直接接触的木材分解速度是与土壤分离的木材分解速度的1.4倍。我们的研究结果表明,白蚁可以超过微生物在亚热带森林木材分解的重要性,并突出了土壤接触在确定腐烂率的重要性。
Deadwood contains a sizeable proportion of total forest C, and its decomposition transfers organic C to the atmosphere, other organisms and soils. Microbes have traditionally been thought to be the primary drivers of wood decomposition worldwide, but few studies have tested the relative importance of termites to this process. The aim of this study was to compare the relative contributions of microbes and termites to wood (Cinnamomum camphora) decomposition by conducting a field experiment of termite access (with and without termite exclusion) and soil contact (with and without soil contact) treatments in subtropical China. After a two-year period, termites were responsible for an estimated 55.7% and 48.9% of observed wood loss from wood blocks with and without soil contact, respectively. Wood in direct contact with the soil decomposed 1.4 times as fast as wood separated from the soil. Our results show that termites can exceed microbes in importance to wood decomposition in subtropical forests and highlight the importance of soil contact in determining decay rates.
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