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首页> 外文期刊>Applied Soil Ecology >Functional structure, taxonomic composition and the dominant assembly processes of soil prokaryotic community along an altitudinal gradient
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Functional structure, taxonomic composition and the dominant assembly processes of soil prokaryotic community along an altitudinal gradient

机译：沿着高度梯度的功能结构，分类组成和土壤原核群落的主要组装过程

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摘要

As more attentions have been paid to microbial taxonomic community structure along altitudinal gradients, the knowledge of the altitudinal variations in microbial functional structure in terrestrial ecosystems is limited. More importantly, the dominant assembly processes that drive altitudinal variations in both taxonomic composition and functional structure remain unclear. To fill the gaps, we integrated soil prokaryotic taxonomic community structure, functional community structure and community assembly processes along an altitudinal gradient into a comprehensive understanding. The results revealed that both taxonomic community structure and core functional community structure of soil prokaryotic microbes significantly differed across altitudes. We detected the core functional groups associated with the redox reactions essential for microbial metabolism and biogeochemical cycles across altitudes. Chemoheterotrophy and photoautotrophy were dominant in abundance, indicating the important roles of primary energy metabolism for soil prokaryotic community. The whole prokaryotic community taxonomic composition was dominantly shaped by dispersal limitation (governing 74% of spatial turnover). The variation of functional structure was primarily caused by environmental selection, while the taxonomic variation within individual functional groups was weakly related to selection but mainly driven by drift. These results are critical for predicting the future dynamics of soil microbial community in the face of disturbances.
机译：随着沿着高度梯度的微生物分类学群落结构支付更多的注意，陆地生态系统中微生物功能结构的高度变化的知识是有限的。更重要的是，推动分类组合物和功能结构的平坦变化的主导组装过程仍不清楚。为了填补差距，我们综合土壤原核分类群落结构，功能群落结构和社区组装过程沿着一般性梯度纳入全面的理解。结果表明，土壤群落结构和土壤原核微生物的核心功能群落结构均有显着差别。我们检测到与微生物代谢的氧化还原反应相关的核心官能团和跨高度的生物地球化学循环。 ChemoheteroToRophy和PhotoSutotrophy在丰富的占主导地位，表明土壤原核群落的原发性代谢的重要作用。整个原核群落分类组合物通过分散限制（控制空间周转的74％）是显着的。功能结构的变化主要是由环境选择引起的，而单个官能团内的分类学变异与选择弱，而且主要由漂移驱动。这些结果对于预测面对干扰的土壤微生物群落的未来动态至关重要。

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