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首页> 外文期刊>Ecological research >Responses of litter decomposition to temperature along a chronosequence of tropical montane rainforest in a microcosm experiment
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Responses of litter decomposition to temperature along a chronosequence of tropical montane rainforest in a microcosm experiment

机译：微观实验中热带山地雨林凋落物分解对温度的响应

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摘要

We conducted a microcosm experiment for studying the decomposition of Altingia obovata leaf litter by the decomposer community at 20 and 30℃ from three forest stands (namely a 35-year-old secondary forest, a 47-year-old secondary forest, and a primary forest) of a tropical montane rainforest. Our results showed that rank-order of the litter decomposition among the three forest stands was not parallel to the stand age. At 20℃, the mass loss of A. obovata leaf litter from the primary forest was higher than those from the two secondary forests, of which the younger stand showed higher mass loss than did the older one. However, there were no differences in mass loss among these three stands at 30℃. The mass loss for the two secondary forest stands, but not for the primary forest stand, increased significantly from 20 to 30℃. The level of lignin decomposition among the three stands at 20℃ corresponded to their forest stand age, i.e., the primary forest > the 47-year-old secondary forest > the 35-year-old secondary forest. A rise of 10℃ in temperature significantly increased lignin decomposition for the two secondary forests, while the reverse was true for the primary forest. Carbohydrate decomposition was positively related to the temperature but not to the stand age. The different responses of litter decomposition to the forest stand age and temperature might be due to therndifferences in the microbial activities among the three forest stands.
机译：我们进行了一个微观实验，研究分解者群落在20和30℃下从三个林分（即35岁的次生林，47岁的次生林和主要林分森林）的热带山地雨林。我们的结果表明，三个林分中凋落物分解的等级顺序与林分年龄不平行。在20℃时，原始林的落叶松凋落物的质量损失高于两个次生林的凋落物的质量损失，其中年轻的林分比较老的林分表现出更高的质量损失。然而，这三个支架在30℃时的质量损失没有差异。两个次生林的质量损失从20℃显着增加到30℃，但次生林的质量损失没有明显增加。 3个林分在20℃时木质素分解的水平与其林分年龄相对应，即原始林> 47岁的次生林> 35岁的次生林。温度升高10℃会大大增加两个次生林的木质素分解，而对于原始林则相反。碳水化合物的分解与温度呈正相关，而与贮藏期限无关。凋落物分解对林分年龄和温度的不同响应可能是由于这三个林分之间微生物活动的差异所致。

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  • 来源
    《Ecological research》 |2009年第4期|781-789|共9页
  • 作者

    Xingbing He; Peng Zhang; Yonghui Lin; Airong Li; Xingjun Tian; Qing-He Zhang;

  • 作者单位

    School of Life Science, Nanjing University, 210093 Nanjing. People's Republic of China Key Laboratory of Plant Resources Conservation and Utilization. Jishou University, 416000 Jishou, People's Republic of China;

    School of Life Science, Nanjing University, 210093 Nanjing. People's Republic of China;

    Key Laboratory of Plant Resources Conservation and Utilization. Jishou University, 416000 Jishou, People's Republic of China;

    School of Life Science, Nanjing University, 210093 Nanjing. People's Republic of China;

    School of Life Science, Nanjing University, 210093 Nanjing. People's Republic of China;

    Sterling International, Inc., Spokane, WA 99216-1630, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    altingia obovata; enzyme activity; litter decomposition; stand age; temperature;

    机译：阿尔巴蒂亚酶活性垃圾分解;年龄温度;

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