Long-term mowing reinforces connections between soil microbial and plant communities in a temperate steppe
Long-term mowing reinforces connections between soil microbial and plant communities in a temperate steppe
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长期割草加强了温带草原土壤微生物和植物群落之间的联系
DOI：
10.1007/s11104-022-05374-9
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发表时间：
2022-03-19
期刊：
影响因子：
4.9
通讯作者：
Bai, Wenming
中科院分区：
文献类型：
--
作者：
Bai, Ren;Zhou, Meng;Bai, Wenming
目的割草是内蒙古草原重要的管理措施，能显著调节植物和土壤微生物群落。然而，长期割草对草地生态系统土壤微生物区系的影响很少被评估，割草下植物群落对地下微生物区系的影响主要集中在植物α多样性上，而植物β多样性的作用在很大程度上未知。研究了土壤微生物群落与植物/土壤参数的关系，以及土壤微生物β多样性与植物群落的相关性。我们还构建了共现网络，探讨割草对植物群落和三个微生物类群（细菌，真菌，原生生物）之间的相互作用的遗产。ResultsWe发现，长期割草对植物和三个微生物类群的群落结构有显着影响。土壤微生物群落结构主要与地上生物量、植物凋落物、根系碳氮比和植物Shannon指数等植物参数相关，而与土壤性质无关。土壤微生物群落β多样性受植物群落β多样性的调控。此外，割草增强了植物-微生物的相互作用，在网络下长期mowing.ConclusionsLong-term割草显着改变植物和土壤微生物群落组成，可以加强他们的联系。长期割草引起的植物群落属性的变化可能是草地土壤微生物群落形成的更有效因素。
PurposeMowing is an important management practice in the Inner Mongolia grassland and can significantly regulate plant and soil microbial communities. However, impact of long-term mowing on soil microbiota has been rarely evaluated in grassland ecosystems, and the effects of plant community on belowground microbiota under mowing were mainly focused on plant α-diversity, while the role of plant β-diversity is largely unknown.MethodsWe examined the soil bacterial, fungal and protistan communities under the influence of a 17-year mowing treatment in a natural grassland of Inner Mongolia, and studied the relationship between the soil microbial communities and plant/soil parameters, and the correlations between β-diversity of the soil microbial and plant communities. We also constructed co-occurrence networks to investigate the legacy of mowing on the interactions between plant community and the three microbial groups (bacteria, fungi, protists).ResultsWe found that long-term mowing had significant effects on the community structures of plants and the three microbial groups. The microbial community structures mainly correlated to the plant parameters including aboveground biomass, plant litter, root carbon-to-nitrogen ratio, and plant Shannon index rather than to soil properties. Moreover, β-diversity of the soil microbial communities was significantly regulated by plant community β-diversity. Furthermore, mowing enhanced plant-microbe interactions in the networks under long-term mowing.ConclusionsLong-term mowing significantly alters plant and soil microbial community compositions and can reinforce their connections. The induced shifts of plant community attributes by long-term mowing rather than soil properties may be more effective factors in shaping soil microbial communities in grasslands.