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Plant functional β diversity is an important mediator of effects of aridity on soil multifunctionality.
Science of the Total Environment ( IF 8.2 ) Pub Date : 2020-04-07 , DOI: 10.1016/j.scitotenv.2020.138529
Yongzhi Yan 1 , Qing Zhang 1 , Alexander Buyantuev 2 , Qingfu Liu 3 , Jianming Niu 1
Affiliation  

Previous studies have demonstrated that plant diversity not only plays an important role in maintaining ecosystem functions but can also mediate the impact of climate change on ecosystem functions. However, the relative importance of multiple aspects of diversity at different scales remains unclear. In this study, we investigated species, functional, and phylogenetic aspects of diversity at α and β scales, and measured eight soil functions (aboveground productivity, soil organic carbon, total soil nitrogen, total soil phosphorus, soil available nitrogen, soil available phosphorus, soil carbon-nitrogen ratio, and soil nitrogen-phosphorus ratio) to comprehensively assess the relationship between multiple aspects and scales of plant diversity and soil multifunctionality along an aridity gradient across the grasslands of Inner Mongolia. Diversity at α and β scales explained soil multifunctionality synergistically. Functional diversity explained most of the soil multifunctionality, while phylogenetic diversity explained the least. Aridity had both direct effects on soil multifunctionality, and indirect effects mediated mainly by functional α and β diversity. These findings indicate that in addition to α diversity, β diversity also played an important role in maintaining soil multifunctionality, and was an important mediator for the adverse impact of aridity on soil multifunctionality. Our study highlights the critical role of β diversity, especially regarding functional traits, in predicting the consequences of the increasingly arid conditions in the Inner Mongolian grasslands.

中文翻译:

植物功能性β多样性是干旱对土壤多功能性影响的重要介质。

先前的研究表明,植物多样性不仅在维持生态系统功能方面发挥重要作用,而且还可以介导气候变化对生态系统功能的影响。但是,目前尚不清楚不同规模多样性的各个方面的相对重要性。在这项研究中,我们调查了α和β尺度下物种的多样性,功能和系统发育方面,并测量了八种土壤功能(地上生产力,土壤有机碳,土壤总氮,土壤总磷,土壤有效氮,土壤有效磷,土壤碳氮比和土壤氮磷比),以全面评估内蒙古草原干旱梯度上植物多样性和土壤多功能性的多个方面和尺度之间的关系。α和β尺度的多样性可以协同解释土壤的多功能性。功能多样性解释了大多数土壤多功能性,而系统发育多样性解释最少。干旱对土壤的多功能性有直接影响,而间接影响主要由功能性α和β多样性介导。这些发现表明,除α多样性外,β多样性在维持土壤多功能性方面也起着重要作用,并且是干旱对土壤多功能性不利影响的重要介体。我们的研究强调了β多样性(尤其是功能性状)在预测内蒙古草原日益干旱的条件的后果方面的关键作用。功能多样性解释了大多数土壤多功能性,而系统发育多样性解释最少。干旱对土壤的多功能性有直接影响,而间接影响主要由功能性α和β多样性介导。这些发现表明,除α多样性外,β多样性在维持土壤多功能性方面也起着重要作用,并且是干旱对土壤多功能性不利影响的重要介体。我们的研究强调了β多样性(尤其是功能性状)在预测内蒙古草原日益干旱的条件的后果方面的关键作用。功能多样性解释了大多数土壤多功能性,而系统发育多样性解释最少。干旱对土壤的多功能性有直接影响,而间接影响主要由功能性α和β多样性介导。这些发现表明,除α多样性外,β多样性在维持土壤多功能性方面也起着重要作用,并且是干旱对土壤多功能性不利影响的重要介体。我们的研究强调了β多样性(尤其是功能性状)在预测内蒙古草原日益干旱的条件的后果方面的关键作用。间接作用主要由功能性α和β多样性介导。这些发现表明,除α多样性外,β多样性在维持土壤多功能性方面也起着重要作用,并且是干旱对土壤多功能性不利影响的重要介体。我们的研究强调了β多样性(尤其是功能性状)在预测内蒙古草原日益干旱的条件的后果方面的关键作用。间接作用主要由功能性α和β多样性介导。这些发现表明,除α多样性外,β多样性在维持土壤多功能性方面也起着重要作用,并且是干旱对土壤多功能性不利影响的重要介体。我们的研究强调了β多样性(尤其是功能性状)在预测内蒙古草原日益干旱的条件的后果方面的关键作用。
更新日期:2020-04-08
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