Are drivers of root-associated fungal community structure context specific?
Are drivers of root-associated fungal community structure context specific?
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DOI：
10.1038/s41396-019-0350-y
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发表时间：
2019-05-01
期刊：
影响因子：
11
通讯作者：
Dumbrell, Alex J.
中科院分区：
文献类型：
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作者：
Alzarhani, A. Khuzaim;Clark, Dave R.;Dumbrell, Alex J.
植物根际真菌群落的组成和结构取决于当地的非生物和生物条件。然而，非生物和生物因素的关系的相对影响和身份可能会因环境和生态背景以及真菌功能群而异。因此，了解根相关真菌群落生态学的哪些方面在不同背景下通用是迈向更具预测性框架的第一步。我们研究了生物和非生物因素的相对重要性如何在环境和生态背景下使用高通量测序（ca。55 M Illumina metabarcoding sequences）的>260植物根相关真菌群落，这些真菌群落来自两个地理区域（英格兰东南部和西北部）的六个英国盐沼，在冬季和夏季。根相关的真菌多样性水平与森林和温带草原相媲美，翻两番以前估计的盐沼真菌多样性。虽然非生物变量通常是最重要的，一系列的网站和空间尺度特定的非生物和生物多样性和社区组成的驱动程序进行了观察。因此，在一个地点训练的多样性预测模型，外推到其他地方的效果很差。来自相同功能组的真菌类群对多样性和组成的特定驱动因素的反应相似。因此，网站，空间尺度和功能组的关键因素，如果占，可能会导致更有预测性的了解真菌群落生态。
The composition and structure of plant-root-associated fungal communities are determined by local abiotic and biotic conditions. However, the relative influence and identity of relationships to abiotic and biotic factors may differ across environmental and ecological contexts, and fungal functional groups. Thus, understanding which aspects of rootassociated fungal community ecology generalise across contexts is the first step towards a more predictive framework. We investigated how the relative importance of biotic and abiotic factors scale across environmental and ecological contexts using high-throughput sequencing (ca. 55 M Illumina metabarcoding sequences) of >260 plant-root-associated fungal communities from six UK salt marshes across two geographic regions (South-East and North-West England) in winter and summer. Levels of root-associated fungal diversity were comparable with forests and temperate grasslands, quadrupling previous estimates of salt-marsh fungal diversity. Whilst abiotic variables were generally most important, a range of site- and spatial scale-specific abiotic and biotic drivers of diversity and community composition were observed. Consequently, predictive models of diversity trained on one site, extrapolated poorly to others. Fungal taxa from the same functional groups responded similarly to the specific drivers of diversity and composition. Thus site, spatial scale and functional group are key factors that, if accounted for, may lead to a more predictive understanding of fungal community ecology.