Spatial scale affects the relative role of stochasticity versus determinism in soil bacterial communities in wheat fields across the North China Plain.
Spatial scale affects the relative role of stochasticity versus determinism in soil bacterial communities in wheat fields across the North China Plain.
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空间尺度影响华北平原麦田土壤细菌群落随机性与决定性的相对作用
DOI：
10.1186/s40168-018-0409-4
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发表时间：
2018-02-05
期刊：
影响因子：
15.5
通讯作者：
Chu H
中科院分区：
文献类型：
--
作者：
Shi Y;Li Y;Xiang X;Sun R;Yang T;He D;Zhang K;Ni Y;Zhu YG;Adams JM;Chu H
背景随机性与决定论在土壤细菌群落中的相对重要性尚不清楚，也不清楚改变这些之间平衡的可能影响。在这里，我们调查了空间尺度的随机性和决定性的相对作用，在农业单作只包括小麦，从而尽量减少植物物种覆盖和耕作/干扰制度的差异的影响，延伸到广泛的土壤和气候的华北平原（NCP）。我们在1092 km范围内对243个位点进行了采样，并使用MiSeq对16 S rRNA细菌基因进行了测序。我们假设，决定论将在最广泛的尺度上发挥相对更强的作用，这是由于气候和土壤差异在选择适应不同环境的许多不同OTU细菌方面的强烈影响。为了测试更普遍的适用性的假设，我们还比较了与自然生态系统在青藏高原。ResultsOur结果显示，随机性与决定论的相对重要性确实随空间尺度的变化，在预测的方向。在华北平原，随机性占主导地位的150至900公里（对站点之间的分离）和决定性占主导地位的900公里以上（宽尺度）。青藏高原130 ~ 1200 km范围内，决定性因素占主导地位，130 km以内以随机性因素为主。土壤pH值对华北平原土壤细菌群落结构和多样性的影响最大。土壤微生物群落组成的变化有23.9%可以解释，其中环境因素占19.7%，空间因素占4.1%。结论（1）华北平原土壤微生物群落组成的变化主要是随机过程，而青藏高原土壤微生物群落组成的变化主要是确定性过程;（2）土壤pH值是影响华北平原土壤细菌群落结构的主要因素，（3）土壤微生物群落结构的大部分变化不能用现有的环境和空间因素来解释。需要进一步的研究来剖析随机因素的影响（例如，突变或突变）对土壤微生物群落分布的影响，这可能使可预测地操纵微生物群落以产生更好的产量和土壤可持续性结果变得更容易。
BackgroundThe relative importance of stochasticity versus determinism in soil bacterial communities is unclear, as are the possible influences that alter the balance between these. Here, we investigated the influence of spatial scale on the relative role of stochasticity and determinism in agricultural monocultures consisting only of wheat, thereby minimizing the influence of differences in plant species cover and in cultivation/disturbance regime, extending across a wide range of soils and climates of the North China Plain (NCP). We sampled 243 sites across 1092 km and sequenced the 16S rRNA bacterial gene using MiSeq. We hypothesized that determinism would play a relatively stronger role at the broadest scales, due to the strong influence of climate and soil differences in selecting many distinct OTUs of bacteria adapted to the different environments. In order to test the more general applicability of the hypothesis, we also compared with a natural ecosystem on the Tibetan Plateau.ResultsOur results revealed that the relative importance of stochasticity vs. determinism did vary with spatial scale, in the direction predicted. On the North China Plain, stochasticity played a dominant role from 150 to 900 km (separation between pairs of sites) and determinism dominated at more than 900 km (broad scale). On the Tibetan Plateau, determinism played a dominant role from 130 to 1200 km and stochasticity dominated at less than 130 km. Among the identifiable deterministic factors, soil pH showed the strongest influence on soil bacterial community structure and diversity across the North China Plain. Together, 23.9% of variation in soil microbial community composition could be explained, with environmental factors accounting for 19.7% and spatial parameters 4.1%.ConclusionsOur findings revealed that (1) stochastic processes are relatively more important on the North China Plain, while deterministic processes are more important on the Tibetan Plateau; (2) soil pH was the major factor in shaping soil bacterial community structure of the North China Plain; and (3) most variation in soil microbial community composition could not be explained with existing environmental and spatial factors. Further studies are needed to dissect the influence of stochastic factors (e.g., mutations or extinctions) on soil microbial community distribution, which might make it easier to predictably manipulate the microbial community to produce better yield and soil sustainability outcomes.
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影响因子：
2.9
作者：
Chu, Haiyan;Neufeld, Josh D.;Grogan, Paul
通讯作者：
Grogan, Paul
DOI：
10.1038/ismej.2012.8
发表时间：
2012-08
期刊：
The ISME journal
影响因子：
--
作者：
通讯作者：
--
青藏高原西部表层和地下土壤细菌群落差异相当于数公里水平差异
影响因子：
5.1
作者：
Chu, Haiyan;Sun, Huaibo;Shi, Yu
通讯作者：
Shi, Yu
影响因子：
5.9
作者：
FAITH, DP
通讯作者：
FAITH, DP
影响因子：
4.8
作者：
BORCARD, D;LEGENDRE, P;DRAPEAU, P
通讯作者：
DRAPEAU, P