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首页> 外文期刊>Ecosystems >Home Field Advantage of Litter Decomposition in Pure and Mixed Plantations Under Boreal Climate
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Home Field Advantage of Litter Decomposition in Pure and Mixed Plantations Under Boreal Climate

机译：北方气候下纯人工和混交林凋落物分解的本场优势

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摘要

Tree species influence the litter decomposition process by influencing litter quality and soil microclimate. Furthermore, over the long term, trees could promote soil communities that are particularly capable of degrading the litter they encounter most often. Thus, plant litter could decompose faster when placed in the habitat from which it was derived than in a foreign habitat, which has been termed home field advantage (HFA) of litter decomposition. In mixed-plant species environments however, it is not known whether a specific decomposer community under one tree species is affected by the presence of another tree species in the vicinity. To address this question, we tested if spruce and poplar litters showed HFA in mono-specific and in mixed species plantations under each tree species by reciprocally transplanting litter in the two plantation types. Decomposition rates, as well as the composition and ability of decomposer communities to degrade the different types of litter, were monitored during two years. Only spruce litter exhibited a faster decomposition rate at home. This HFA could be explained by higher abundance of decomposers. Furthermore, cellulose and poplar litter decomposed less or similarly in spruce plantations, suggesting that soil communities of that environment were capable of specifically degrading spruce litter. In mixed plantations, HFA was in the same direction as in mono-specific plantations, but was not as strong, indicating that HFA is sensitive to the surrounding plant community. Furthermore, this "mixed environment" had synergistic effects on decomposition rates under poplar trees. These 'tree environment-specific' results highlighted the possible importance of spatial distribution of each litter on decomposition rates in mixed stands. Thus, the influence of litter dispersal should be taken into account in future studies.
机译：树木物种通过影响凋落物质量和土壤小气候来影响凋落物分解过程。此外，从长远来看，树木可以促进土壤社区的发展，这些社区特别有能力降解他们最常遇到的垃圾。因此，将植物凋落物放置在其起源的栖息地中比在国外栖息地中分解更快，这被称为凋落物分解的本田优势（HFA）。然而，在混合植物物种的环境中，未知一种树种下的特定分解者群落是否受到附近另一种树种的存在的影响。为了解决这个问题，我们通过在两种人工林中相互移植凋落物，来测试云杉和杨树凋落物在每种树种下的单特异性和混合树种人工林中是否显示出HFA。在两年中监测了分解速率，以及分解者群落降解不同类型垃圾的组成和能力。只有云杉凋落物在家里表现出更快的分解速度。这种HFA可以通过分解器的数量更多来解释。此外，纤维素和杨树凋落物在云杉人工林中分解得很少或相似，这表明该环境下的土壤群落能够专门降解云杉凋落物。在混合人工林中，HFA与单一种人工林的方向相同，但强度不高，表明HFA对周围植物群落敏感。此外，这种“混合环境”对杨树下的分解速率具有协同作用。这些“树木特定环境”的结果强调了混合分布林中每个凋落物空间分布对分解速率的重要性。因此，在未来的研究中应考虑到凋落物扩散的影响。

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