Abstract
Aims
Current studies on the relationship between biodiversity and ecosystem functioning have mostly focused on plant communities. Less is known about the individual and combined effects of biodiversity components above-and-below-ground on ecosystem multifunctionality. The aim of this study was to explore how different management regimes influence multifunctionality via modification of both plant and soil microbial (bacterial and fungal) diversity.
Methods
We used a 6-year experiment in Inner Mongolian grassland to compare multifunctionality and separate functions related to the C, N, P cycles and plant productivity under four management regimes and examine relationships between these functions and different components of biodiversity, both above- and belowground.
Results
Ecosystem multifunctionality and the rates of nutrient cycling and plant productivity, were greatest under moderate grazing intensity, and lowest under no grazing. Further, across all management regimes, multifunctionality was positively related to plant diversity, and plant and soil microbial diversity combined explained a much greater (62.5%) proportion of variance in multifunctionality than that did either component alone. Different components of biodiversity showed contrasting relationships with individual functions: plant diversity was positively related to C and N cycling, whereas bacterial diversity was negatively related to P cycling and plant productivity.
Conclusions
Moderate grazing has better outcomes for biodiversity conservation and ecosystem multifunctionality than mowing and cessation of grazing. Sustainable grazing management is a viable strategy to conserve both above- and belowground biodiversity and enhance the delivery of multiple ecosystem functions.
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Acknowledgements
The research was supported by the Ministry of Science and Technology of China (Grant No.2016YFC0500508; 2015BAC02B04; 2014CB138805) and the Department of Science and Technology of Inner Mongolia Autonomous Region of China (Grant for Key Basic Research on Grassland Ecosystems). RDB was supported by BBSRC GCRF grant (BB/P022987/1) “Restoring soil function and resilience to degraded grasslands”.
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Wang, X., Li, F.Y., Wang, Y. et al. High ecosystem multifunctionality under moderate grazing is associated with high plant but low bacterial diversity in a semi-arid steppe grassland. Plant Soil 448, 265–276 (2020). https://doi.org/10.1007/s11104-020-04430-6
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DOI: https://doi.org/10.1007/s11104-020-04430-6