Abundance of kinless hubs within soil microbial networks are associated with high functional potential in agricultural ecosystems
Shi, Yu (Chinese Academy of Sciences. Institute of Soil Science)
Delgado-Vaquerizo, Manuel (Universidad Pablo de Olavide)
Li, Yuntao (Chinese Academy of Sciences. Institute of Soil Science)
Yang, Yunfeng (Tsinghua University. School of Environment)
Zhu, Yong-Guan (Chinese Academy of Sciences. Institute of Urban Environment)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Chu, Haiyan (Chinese Academy of Sciences. Institute of Soil Science)

Data:	2020
Resum:	Microbial taxa within complex ecological networks can be classified by their universal roles based on their level of connectivity with other taxa. Highly connected taxa within an ecological network (kinless hubs) are theoretically expected to support higher levels of ecosystem functions than less connected taxa (peripherals). Empirical evidence of the role of kinless hubs in regulating the functional potential of soil microbial communities, however, is largely unexplored and poorly understood in agricultural ecosystems. Here, we built a correlation network of fungal and bacterial taxa using a large-scale survey consisting of 243 soil samples across functionally and economically important agricultural ecosystems (wheat and maize); and found that the relative abundance of taxa classified as kinless hubs within the ecological network are positively and significantly correlated with the abundance of functional genes including genes for C fixation, C degradation, C methanol, N cycling, P cycling and S cycling. Structural equation modeling of multiple soil properties further indicated that kinless hubs, but not provincial, connector or peripheral taxa, had direct significant and positive relationships with the abundance of multiple functional genes. Our findings provide novel evidence that the relative abundance of soil taxa classified as kinless hubs within microbial networks are associated with high functional potential, with implications for understanding and managing (through manipulating microbial key species) agricultural ecosystems at a large spatial scale.
Ajuts:	European Commission 610028 Ministerio de Economía y Competitividad RYC2018-025483-I
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Microbial network ; Kinless hub ; Functional geneFungi ; Bacteria
Publicat a:	Environment International, Vol. 142 (Sep. 2020) , art. 105869, ISSN 1873-6750

DOI: 10.1016/j.envint.2020.105869

9 p, 1.8 MB

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