凋落物操控对中国南方热带森林演替梯度中凋落物分解的影响。
Effects of litter manipulation on litter decomposition in a successional gradients of tropical forests in southern China.
作者信息
Chen Hao, Gurmesa Geshere A, Liu Lei, Zhang Tao, Fu Shenglei, Liu Zhanfeng, Dong Shaofeng, Ma Chuan, Mo Jiangming
机构信息
Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China.
Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark; University of Chinese Academy of Sciences, Beijing, China; Sino-Danish Center for Education and Research, Aarhus, Denmark.
出版信息
PLoS One. 2014 Jun 5;9(6):e99018. doi: 10.1371/journal.pone.0099018. eCollection 2014.
Global changes such as increasing CO2, rising temperature, and land-use change are likely to drive shifts in litter inputs to forest floors, but the effects of such changes on litter decomposition remain largely unknown. We initiated a litter manipulation experiment to test the response of litter decomposition to litter removal/addition in three successional forests in southern China, namely masson pine forest (MPF), mixed coniferous and broadleaved forest (MF) and monsoon evergreen broadleaved forest (MEBF). Results showed that litter removal decreased litter decomposition rates by 27%, 10% and 8% and litter addition increased litter decomposition rates by 55%, 36% and 14% in MEBF, MF and MPF, respectively. The magnitudes of changes in litter decomposition were more significant in MEBF forest and less significant in MF, but not significant in MPF. Our results suggest that change in litter quantity can affect litter decomposition, and this impact may become stronger with forest succession in tropical forest ecosystem.
诸如二氧化碳增加、气温上升和土地利用变化等全球变化可能会推动进入森林地表的凋落物输入量发生变化，但此类变化对凋落物分解的影响在很大程度上仍不清楚。我们启动了一项凋落物操纵实验，以测试中国南方三个演替森林（即马尾松林（MPF）、针叶阔叶混交林（MF）和季风常绿阔叶林（MEBF））中凋落物分解对凋落物去除/添加的响应。结果表明，在MEBF、MF和MPF中，凋落物去除分别使凋落物分解速率降低了27%、10%和8%，凋落物添加分别使凋落物分解速率提高了55%、36%和14%。凋落物分解的变化幅度在MEBF森林中更为显著，在MF中较不显著，而在MPF中不显著。我们的结果表明，凋落物数量的变化会影响凋落物分解，并且这种影响可能会随着热带森林生态系统中的森林演替而变得更强。
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