Bamboo invasion of broadleaf forests altered soil fungal community closely linked to changes in soil organic C chemical composition and mineral N production
Bamboo invasion of broadleaf forests altered soil fungal community closely linked to changes in soil organic C chemical composition and mineral N production
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竹子对阔叶林的入侵改变了土壤真菌群落，与土壤有机碳化学成分和矿质氮产量的变化密切相关
DOI：
10.1007/s11104-017-3313-y
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发表时间：
2017-09-01
期刊：
影响因子：
4.9
通讯作者：
Liang, Xue
中科院分区：
文献类型：
--
作者：
Li, Yongchun;Li, Yongfu;Liang, Xue
土壤真菌在分解土壤有机质、促进植物吸收养分等方面具有重要作用，但植物入侵过程中真菌群落与土壤地球化学循环的关系尚不清楚。研究毛竹万年青阔叶林对土壤有机碳（SOC）化学组成、真菌群落和矿质氮产量的影响。结果毛竹入侵降低了土壤烷基碳含量，但增加了O-烷基碳含量。土壤真菌丰度（18 S rRNA）下降，α多样性增加。此外，毛竹入侵提高了净氮矿化速率，但降低了总硝化速率。真菌群落组成与烷基C含量密切相关，烷基C含量解释了真菌丰度变化的32%。真菌群落组成与总硝化速率相关，总硝化速率的变化中有43%归因于土壤真菌abundance.ConclusionsChanges在土壤真菌群落中引起的竹子入侵阔叶林是密切相关的改变土壤有机C化学组成和减速硝酸盐的生产。
AimsSoil fungi play an important role in decomposing soil organic matter and facilitating nutrient uptake by plants, however, the relationship between fungal community and soil biogeochemical cycling during plant invasion is poorly understood. The objective of this study was to investigate the effects of Moso bamboo (Phyllostachys edulis) invasion into broadleaf forests on the soil organic C (SOC) chemical composition, fungal community and mineral N production.MethodsWe collected soil samples in evergreen broadleaf forests, mixed bamboo-broadleaf forests and bamboo forests. Soil fungal community and SOC chemical composition were determined.ResultsBamboo invasion decreased alkyl C but increasedO-alkyl C contents. Soil fungal abundance (18S rRNA) was decreased, while their alpha diversity was increased by bamboo invasion. Additionally, bamboo invasion enhanced net N mineralization rate but reduced gross nitrification rate. The fungal community composition strongly correlated with alkyl C content, and alkyl C content explained 32% of the variation in the fungal abundance. Fungal community composition correlated with gross nitrification rate, with 43% of the variation in gross nitrification rate attributable to soil fungal abundance.ConclusionsChanges in soil fungal community caused by bamboo invasion into broadleaf forests were closely linked to changed soil organic C chemical composition and decelerated nitrate production.