期刊
ENVIRONMENTAL MICROBIOLOGY
卷 23, 期 1, 页码 -出版社
WILEY
DOI: 10.1111/1462-2920.15326
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资金
- National Natural Science Foundation of China [41671267, 41771294, 41977045]
- National Key RD Program [2016YFD0200306, 2019YFC1520700]
- Knowledge Innovation Program of Chinese Academy of Sciences [ISSASIP1639]
- US Department of Energy (DOE), Office of Biological and Environmental Research (BER), as part of Subsurface Biogeochemical Research Program's Scientific Focus Area (SFA) at the Pacific Northwest National Laboratory (PNNL)
- DOE [DE-AC06-76RLO 1830]
The study investigated the influence of stochastic and deterministic assembly processes in different agroecosystems, finding that deterministic processes favor microorganisms with similar functions, while stochastic processes lead to functional divergence. Maintaining a balance between stochastic and deterministic processes is crucial for the services of agroecosystems.
Ecological assembly processes, by influencing community composition, determine ecosystem functions of microbiomes. However, debate remains on how stochastic versus deterministic assembly processes influence ecosystem functions such as carbon and nutrient cycling. Towards a better understanding, we investigated three types of agroecosystems (the upland, paddy, and flooded) that represent a gradient of stochastic versus deterministic assembly processes. Carbon and nutrient cycling multifunctionality, characterized by nine enzymes associated with soil carbon, nitrogen, phosphorous and sulfur cycling, was evaluated and then associated with microbial assembly processes and co-occurrence patterns of vital ecological groups. Our results suggest that strong deterministic processes favour microorganisms with convergent functions (as in the upland agroecosystem), while stochasticity-dominated processes lead to divergent functions (as in the flooded agroecosystem). To benefit agroecosystems services, we speculate that it is critical for a system to maintain balance between its stochastic and deterministic assembly processes (as in the paddy agroecosystem). By doing so, the system can preserve a diverse array of functional traits and also allow for particular traits to flourish. To further confirm this speculation, it is necessary to develop a systematic knowledge beyond merely characterizing general patterns towards the associations among community assembly, composition, and ecosystem functions.
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