Dynamic microbial assembly processes correspond to soil fertility in sustainable paddy agroecosystems
Dynamic microbial assembly processes correspond to soil fertility in sustainable paddy agroecosystems
复制标题
动态微生物组装过程对应于可持续水稻农业生态系统中的土壤肥力
DOI：
10.1111/1365-2435.13550
复制
发表时间：
2020
影响因子：
5.2
通讯作者：
Feng Youzhi
中科院分区：
文献类型：
--
作者：
Liu Wenjing;Graham Emily;Zhong Linghao;Zhang Jianwei;Li Weitao;Li Zhongpei;Lin Xiangui;Feng Youzhi
1.微生物群落（多样性和功能性状）是11个农业生态系统可持续性的基础。组装过程影响微生物群落组成12，进而决定它们的功能特性。然而，我们对控制微生物群落的组装过程如何随着时间的推移相互作用以保持土壤肥力的理解很差。十五两淹水稻田是一种可持续性水平较高的农业生态系统.古代稻田的耕作历史跨越了1700年或数千年，因此提供了一个理想的机会来探索18社区组装过程和农业生态系统19可持续性之间的关系。在这项研究中，我们使用统计零模型，以评估时间20模式的细菌群落组装过程沿着水稻种植21年，其协会与增加土壤肥力在稻田农业生态系统。22 3.我们发现，随机性是一个持久的力量，结构水稻土微生物23个社区，puristically由于频繁的洪水，设施分散。然而，24决定论在几个世纪的农业中逐渐增加，并与土壤肥力的增加相对应。因此，多功能性，计算使用26酶催化关键土壤功能的碳，氮，磷和硫循环显着增加沿着水稻种植年。因此，我们建议28平衡的组装过程保留了各种各样的性状，这些性状可以在各种情况下占主导地位，同时允许土壤肥力选择与土壤肥力相关的性状，从而支持农业生态系统可持续性的多功能性。4.总之，我们的研究结果强调，知识的时间微生物组装过程，社区组成和生态功能的土壤肥力的背景下，是理解生态机制，保持农业生态系统的可持续性的关键。
1. Micobial community (diversity and functional traits) underpin the sustainability of 11 agroecosystems. Assembly processes influence microbial community composition 12 and in turn determine their functional traits. However we have a poor 13 understanding of how assembly processes that govern microbial community 14 interact through time to maintain soil fertility. 15 2. Flooded rice fields are one kind of agroecosystems with high level of 16 sustainability. Ancient rice paddies have a history of cultivation spanning 17 hundreds or thousands of years and thus provide an ideal opportunity to explore 18 relationships between community assembly processes and agroecosystem 19 sustainability. In this study, we used statistical null models to evaluate temporal 20 patterns of bacterial community assembly processes along rice cultivation years 21 and their associations with increases in soil fertility in paddy agroecosystems. 22 3. We found that stochasticity was a persistent force structuring paddy soil microbial 23 communities, putatively due to frequent flooding that facilities dispersal. However, 24 determinism gradually increased over centuries of agriculture and corresponded to 25 increases in soil fertility. Accordingly, multifunctionality, calculated using 26 enzymes catalyzing key soil functions in carbon, nitrogen, phosphorous and sulfur 27 cycling significantly increased along rice cultivation years. We therefore propose 28 that balanced assembly processes preserve a diverse array of traits that can dominate under various circumstanceswhile allowing for traits relevant to soil fertility to be selected for by soil fertility, thus supporting multifunctionality that underpins agroecosystem sustainability. 4. In total, our results highlight that knowledge on temporal microbial assembly processes, community composition, and ecological function in context of soil fertility is key to understanding ecological mechanisms maintaining agroecosystem sustainability.