Home-field advantage of litter decomposition and nitrogen release in forest ecosystems
Home-field advantage of litter decomposition and nitrogen release in forest ecosystems
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DOI：
10.1007/s00374-012-0741-y
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发表时间：
2012-09
影响因子：
6.5
通讯作者：
Qingkui Wang;Micai Zhong;Tongxin He
中科院分区：
文献类型：
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作者：
Qingkui Wang;Micai Zhong;Tongxin He
凋落物分解是调节森林生态系统养分循环的一个重要的基本生态过程，影响着森林生态系统的净碳储量和初级生产力。垃圾在其家庭环境中分解速度比在任何其他环境中都快。然而，这种现象的证据，这是所谓的主场优势（HFA），并没有普遍。我们通过对全球森林生态系统已发表数据的荟萃分析，首次对凋落物分解和养分释放进行了HFA量化。窝质量损失平均快4.2%，而氮（N）释放在家庭环境中比在另一个环境中低1.7%。但未观察到磷（P）释放的HFA。阔叶林凋落物质量损失率（4.4%）高于针叶林凋落物质量损失率（1.0%）.针叶林凋落物中存在氮释放的正HFA。质量损失HFA与初始木质素：N凋落物比呈显著负相关。在0.15 ~ 2.0mm的网格尺寸范围内，获得了凋落物分解和氮释放的HFA。凋落物分解初期，凋落物分解的HFA随分解时间的延长而增加。氮素释放的HFA与质量损失有很好的相关性，在质量损失小于20%时HFA最大。研究结果表明，凋落物分解和氮释放HFA在森林生态系统中普遍存在。此外，中型土壤动物是显着参与凋落物分解的HFA。
Litter decomposition is a major fundamental ecological process that regulates nutrient cycling, thereby affecting net ecosystem carbon (C) storage as well as primary productivity in forest ecosystems. Litter decomposes in its home environment faster than in any other environment. However, evidence for this phenomenon, which is called the home-field advantage (HFA), has not been universal. We provide the first HFA quantification of litter decomposition and nutrient release through meta-analysis of published data in global forest ecosystems. Litter mass loss was 4.2 % faster on average, whereas nitrogen (N) release was 1.7 % lower at the home environment than in another environment. However, no HFA of phosphorus (P) release was observed. Broadleaf litter (4.4 %) had a higher litter mass loss HFA than coniferous litter (1.0 %). The positive HFA of N release was found in the coniferous litter. Mass loss HFA was significantly and negatively correlated with the initial lignin:N litter ratio. The litter decomposition and N release HFAs were obtained when mesh size ranged from 0.15 mm to 2.0 mm. The HFA of litter decomposition increased with decomposition duration during the early decomposition stage. The HFA of N release was well correlated with mass loss, and the greatest HFA was at mass loss less than 20 %. Our results suggest that the litter decomposition and N release HFAs are widespread in forest ecosystems. Furthermore, soil mesofauna is significantly involved in the HFA of litter decomposition.