Chenxiao Ding , Yaowei Liu , Marcela Hernández , Han Sun , Shuo Jiao , Hong Pan , Tida Ge , Kankan Zhao , Qichun Zhang , Jianming Xu , Yong Li
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引用次数: 0
Abstract
Understanding how bacterial and fungal community traits affect ecosystem functions, and thus provide ecosystem services, is becoming increasingly necessary. However, the relationship between microbial community traits and ecosystem multifunctionality, as well as the mechanisms underlying diversity and multifunctionality, remains a topic of concern. Here, we explored the bacterial and fungal communities and linked them with ecosystem multifunctionality (including enzymatic activity and nutrient pool) in continuous grassland ecosystems (desert, typical and meadow). We found a significant and positive correlation between abundance, diversity, network properties of bacteria and fungi and ecosystem multifunctionality. Bacterial and fungal diversities were the most important factor determining the multifunctionality in grassland ecosystems, whereas their abundance becomes more crucial than diversity in desert grasslands, where the abundances were as low as 1.11 × 107 and 3.67 × 106 copies g−1 soil for bacteria and fungi, respectively. The relative contributions of bacteria and fungi on multifunctionality changed along with grassland types, with the relative contributions of fungi increasing from desert (49.5 %) to typical (50 %), and to the meadow grasslands (67.8 %). Moreover, bacterial and fungal assembly processes were mainly determined by stochastic processes, especially in meadow grasslands, and the microbial assembly processes were significantly positively correlated with diversity-multifunctionality relationship (the correlation coefficients between α diversity and multifunctionality relationships). Taken together, our results reveal the importance of bacterial and fungal abundance and diversity in maintaining soil multifunctionality, and provide strong support for the relationship between assembly process and diversity-multifunctionality in grassland ecosystems.
期刊介绍:
Agriculture, Ecosystems and Environment publishes scientific articles dealing with the interface between agroecosystems and the natural environment, specifically how agriculture influences the environment and how changes in that environment impact agroecosystems. Preference is given to papers from experimental and observational research at the field, system or landscape level, from studies that enhance our understanding of processes using data-based biophysical modelling, and papers that bridge scientific disciplines and integrate knowledge. All papers should be placed in an international or wide comparative context.