Environmental filtering drives distinct continental atlases of soil archaea between dryland and wetland agricultural ecosystems
Environmental filtering drives distinct continental atlases of soil archaea between dryland and wetland agricultural ecosystems
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DOI：
10.1186/s40168-019-0630-9
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发表时间：
2019-02-01
期刊：
影响因子：
15.5
通讯作者：
Lu, Yahai
中科院分区：
文献类型：
--
作者：
Jiao, Shuo;Xu, Yiqin;Lu, Yahai
背景了解农业生态系统中土壤古菌群落的空间分布和生态多样性对于提高作物生产力至关重要。在这里，我们对中国东部相邻的玉米（旱地）和稻田（湿地）田中的土壤古菌群落进行了全面的大陆范围调查。结果我们揭示了环境过滤在驱动玉米和稻田古菌群落聚集中的重要作用。富含广古菌的稻田比以奇古菌为主的玉米田具有更高的古菌多样性和更陡的距离衰减斜率。主要土壤古菌在旱地和湿地生境之间表现出明显的大陆地图集和生态位分化，它们分别与土壤 pH 值和年平均温度相关。在确定了它们的环境偏好后，我们将主要的古菌类群分为不同的生态簇，并确定每个簇内独特的共现模式。利用这个经验数据集，我们建立了土壤古菌群落的大陆图集，以对其在农业生态系统中的空间分布进行可靠的估计。结论环境过滤在驱动旱地和湿地之间主要土壤古菌群落的独特大陆图谱方面发挥着至关重要的作用，并在这两个农业生态系统中古菌驱动的养分循环策略形成鲜明对比。这些发现提高了我们预测土壤古菌群落如何响应环境变化以及管理土壤古菌群落以提供农业生态系统服务的能力。
BackgroundUnderstanding the spatial distributions and ecological diversity of soil archaeal communities in agricultural ecosystems is crucial for improvements in crop productivity. Here, we conducted a comprehensive, continental-scale survey of soil archaeal communities in adjacent pairs of maize (dryland) and rice (wetland) fields in eastern China.ResultsWe revealed the consequential roles of environmental filtering in driving archaeal community assembly for both maize and rice fields. Rice fields, abundant with Euryarchaeota, had higher archaeal diversity and steeper distance-decay slopes than maize fields dominated by Thaumarchaeota. Dominant soil archaea showed distinct continental atlases and niche differentiation between dryland and wetland habitats, where they were associated with soil pH and mean annual temperature, respectively. After identifying their environmental preferences, we grouped the dominant archaeal taxa into different ecological clusters and determined the unique co-occurrence patterns within each cluster. Using this empirical dataset, we built a continental atlas of soil archaeal communities to provide reliable estimates of their spatial distributions in agricultural ecosystems.ConclusionsEnvironmental filtering plays a crucial role in driving the distinct continental atlases of dominant soil archaeal communities between dryland and wetland, with contrasting strategies of archaeal-driven nutrient cycling within these two agricultural ecosystems. These findings improve our ability to predict how soil archaeal communities respond to environmental changes and to manage soil archaeal communities for provisioning of agricultural ecosystem services.