Ecological drivers of soil microbial diversity and soil biological networks in the Southern Hemisphere
Ecological drivers of soil microbial diversity and soil biological networks in the Southern Hemisphere
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DOI：
10.1002/ecy.2137
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发表时间：
2018-03-01
期刊：
影响因子：
4.8
通讯作者：
Bissett, Andrew
中科院分区：
文献类型：
--
作者：
Delgado-Baquerizo, Manuel;Reith, Frank;Bissett, Andrew
南半球土壤生物多样性的生态驱动因素仍未得到充分开发。在这里，在一项由647个地点组成的大陆调查中，我们评估了热带澳大利亚和南极洲之间58度纬度的土壤生物多样性的主要生态模式，以及土壤细菌、古细菌和真核生物共存网络中生态集群的相对丰富度。确定了6个主要的共生土壤类群生态簇(模块)。随着距离赤道的增加，这些星系团的相对丰度发生了强烈的变化。当将澳大利亚和南极洲放在一起分析时，温度是生态集群相对丰度的主要环境驱动因素。温度、干旱、土壤性质和植被类型是澳大利亚不同生态群相对丰富度的主要驱动因素。我们的数据支持，与澳大利亚相比，南极洲的细菌、古菌和真核生物的多样性显著减少，这与气温的大幅下降有关。然而，我们只检测到澳大利亚境内土壤生物多样性的微小纬度变化。不同的环境驱动因素控制着澳大利亚各地土壤古细菌(温度和土壤碳)、细菌(干旱、植被属性和pH)和真核生物(植被类型和土壤碳)的多样性。总之，我们的发现为南半球土壤生物多样性的驱动机制提供了新的见解。
The ecological drivers of soil biodiversity in the Southern Hemisphere remain underexplored. Here, in a continental survey comprising 647 sites, across 58 degrees of latitude between tropical Australia and Antarctica, we evaluated the major ecological patterns in soil biodiversity and relative abundance of ecological clusters within a co-occurrence network of soil bacteria, archaea and eukaryotes. Six major ecological clusters (modules) of co-occurring soil taxa were identified. These clusters exhibited strong shifts in their relative abundances with increasing distance from the equator. Temperature was the major environmental driver of the relative abundance of ecological clusters when Australia and Antarctica are analyzed together. Temperature, aridity, soil properties and vegetation types were the major drivers of the relative abundance of different ecological clusters within Australia. Our data supports significant reductions in the diversity of bacteria, archaea and eukaryotes in Antarctica vs. Australia linked to strong reductions in temperature. However, we only detected small latitudinal variations in soil biodiversity within Australia. Different environmental drivers regulate the diversity of soil archaea (temperature and soil carbon), bacteria (aridity, vegetation attributes and pH) and eukaryotes (vegetation type and soil carbon) across Australia. Together, our findings provide new insights into the mechanisms driving soil biodiversity in the Southern Hemisphere.