Yumei Pan, Xiaojuan Liu, Michael Staab, Naili Zhang
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引用次数: 0
摘要
了解土壤有机质动态对评估土壤碳(C)固存潜力至关重要,而碳(C)固存潜力是减缓气候变化的关键因素。然而,广泛分布于亚热带森林的花外蜜树(EFN)树冠下的土壤C过程的动态研究仍然很少,特别是在树木多样性下降的背景下。本研究以5个树种丰富度(TSR,即1‐、2‐、4‐、8‐和16‐树种)的森林群落为研究对象,研究了EFN树种对土壤C和N组分的影响。重点放在与目标和邻近树木相关的层球和土壤功能真菌行会的作用上。结果表明,EFN树的比例对颗粒有机质(POM)的C含量、POM和矿物伴生有机质(MAOM)的C/N比值以及POM / MAOM比值均有负相关影响。在EFN树及其邻近的非EFN树的冠层下,各组分的峰值土壤C/N比率以及POM - to - MAOM比率从4树种转变为8树种。POM C/N与土壤功能真菌的α多样性直接相关,与定植在受损叶片上的功能真菌的α多样性间接相关。此外,POM和MAOM的C/N比率以及POM与MAOM的比值可能受到真菌共生网络的复杂性、稳定性和潜在的关键分类群的影响。微生物群落的变化可能是由EFN树木与食草昆虫之间的相互作用驱动的。合成。这些结果表明,花外花蜜(EFN)树冠对土壤碳的固存有积极的响应。通过强调EFN树-层圈/土壤真菌关联的重要性及其在树种多样性影响中的作用,本研究有助于全面了解亚热带森林中地上-地下协同作用控制土壤碳封存的机制。
期刊介绍:
Journal of Ecology publishes original research papers on all aspects of the ecology of plants (including algae), in both aquatic and terrestrial ecosystems. We do not publish papers concerned solely with cultivated plants and agricultural ecosystems. Studies of plant communities, populations or individual species are accepted, as well as studies of the interactions between plants and animals, fungi or bacteria, providing they focus on the ecology of the plants.
We aim to bring important work using any ecological approach (including molecular techniques) to a wide international audience and therefore only publish papers with strong and ecological messages that advance our understanding of ecological principles.