https://scholars.lib.ntu.edu.tw/handle/123456789/356697
標題: | Functional diversity of microbial decomposers facilitates plant coexistence in a plant-microbe-soil feedback model | 作者: | TAKESHI MIKI Miki, T. Miki, Takeshi Ushio, Masayuki Chen, Chein-Hung Ushio, Masayuki Fukui, Shin Fukui, Shin Kondoh, Michio Kondoh, Michio |
關鍵字: | Buffering effect; Ecological model; Microbial community; Nutrient cycling; Plant-soil feedback | 公開日期: | 2010 | 卷: | 107 | 期: | 32 | 起(迄)頁: | 14251-14256 | 來源出版物: | Proceedings of the National Academy of Sciences of the United States of America | 摘要: | Theory and empirical evidence suggest that plant-soil feedback (PSF) determines the structure of a plant community and nutrient cycling in terrestrial ecosystems. The plant community alters the nutrient pool size in soil by affecting litter decomposition processes, which in turn shapes the plant community, forming a PSF system. However, the role of microbial decomposers in PSF function is often overlooked, and it remains unclear whether decomposers reinforce or weaken litter-mediated plant control over nutrient cycling. Here, we present a theoreticalmodel incorporating the functional diversity of both plants and microbial decomposers. Two fundamental microbial processes are included that control nutrient mineralization from plant litter: (i) assimilation of mineralized nutrient into the microbial biomass (microbial immobilization), and (ii) release of the microbial nutrients into the inorganic nutrient pool (net mineralization).With this model, we show thatmicrobial diversitymay act as a buffer thatweakens plant control over the soil nutrient pool, reversing the sign of PSF from positive to negative and facilitating plant coexistence. This is explained by the decoupling of litter decomposability and nutrient pool size arising from a flexible change in the microbial community composition and decomposition processes in response to variations in plant litter decomposability. Our results suggest that themicrobial community plays a central role in PSF function and the plant community structure. Furthermore, the results strongly imply that the plant-centered view of nutrient cycling should be changed to a plant-microbe-soil feedback system, by incorporating the community ecology of microbial decomposers and their functional diversity. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-77956288493&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/356697 |
DOI: | 10.1073/pnas.0914281107 | SDG/關鍵字: | article; biomass; decomposition; feedback system; microbial diversity; mineralization; plant community; plant ecology; plant litter; priority journal; soil microflora; species diversity; synecology; biological model; ecosystem; food; food chain; microbiology; plant; soil; theoretical model; Biomass; Ecosystem; Food; Food Chain; Models, Biological; Models, Theoretical; Plants; Soil; Soil Microbiology |
顯示於: | 海洋研究所 |
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