Spatial patterns and determinants of common root-associated fungi in a subtropical forest of China
Spatial patterns and determinants of common root-associated fungi in a subtropical forest of China
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中国亚热带森林常见根相关真菌的空间格局及其决定因素
DOI：
10.1093/jpe/rty018
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发表时间：
2018-06
影响因子：
2.7
通讯作者：
马克平
中科院分区：
文献类型：
--
作者：
Abdul Shakoor;李珊;王芳;田甜;梁宇;马克平
目的真菌种群的空间格局受到植物分布、非生物因素、真菌传播能力和种间相互作用的影响。虽然一些研究已经解决了一些菌根、腐生和病原真菌的空间格局，但基于子实体调查的方法对于研究根相关真菌物种的空间格局效率不高且不可靠，因为植物根部的大多数真菌没有子实体，并且不能仅根据形态特征来识别。我们的目标是（i）确定常见根部相关真菌的空间格局； (ii) 评估与根相关的真菌和真菌类别的丰度和空间格局是否反映了其生物和非生物生态位限制。方法从亚热带森林中的 24 公顷地块中收集了约 828 个土壤核心，并进行了 Illumina Miseq 以确定根部样本中的真菌组成，并使用点模式分析研究了 1009 个常见真菌操作分类单位 (OTU) 的空间格局。生物（植物群落组成）和非生物生态位对真菌 OTU 存在/丰度的限制被评估为生物和非生物特征的维度生态位超体积。 重要发现我们的结果表明（i）大多数真菌 OTU 在小尺度（小于 30 m）上高度空间聚集，但随着距离的增加，聚集模式减少，而规则和随机模式增加； (ii) 真菌丰度与真菌OTU聚集强度呈显着正相关，表明优势真菌在天然林中更趋于聚集； (iii) 外生菌根真菌和病原真菌的平均丰度和空间聚集强度相对高于腐生真菌，表明寄主植物可能在决定根伴生真菌的空间格局中发挥重要作用； (iv)根相关真菌的空间模式取决于真菌丰度、真菌功能群、真菌类群、真菌OTU的生物和非生物生态位超体积。
AimsSpatial patterns of fungal populations are affected by plant distribution, abiotic factors, fungal dispersal ability and inter-species interactions. While several studies have addressed spatial patterns of some mycorrhizal, saprotrophic and pathogenic fungi, the method based on fruit-body surveys is not efficient and unreliable to study the spatial pattern of root-associated fungal species because most fungi in plant roots do not have sporocarps and cannot be identified based only on morphological traits. Our aims are (i) to determine the spatial pattern of common root-associated fungi; (ii) to evaluate whether the abundance and spatial pattern of root-associated fungi and categories of fungi, reflect their biotic and abiotic niche constraints.MethodsAbout 828 soil cores were collected from a 24-ha plot in a subtropical forest and Illumina Miseq was carried out to determine fungal composition in root samples and spatial patterns of 1009 common fungal Operational Taxonomic Units (OTUs) were studied using point pattern analyses. Biotic (plant community composition) and abiotic niche constraints on the presence/abundance of a fungal OTU was assessed as then-dimensional niche hypervolumes of biotic and abiotic characteristics.Important FindingsOur results showed that (i) most fungal OTUs were highly spatially aggregated at small scales (less than 30 m), but that the aggregated pattern decreased, while regular and random patterns increased, with the increasing distance; (ii) A significant positive correlation was found between fungal abundance and aggregation intensity of fungal OTUs, indicating that the dominant fungi tended to be more aggregated in natural forests; (iii) Mean abundance and spatial aggregation intensity of ectomycorrhizal and pathogenic fungi were relatively higher than those of saprotrophic fungi, indicating that host plants may play an important role in determining spatial pattern of root-associated fungi; (iv) Spatial patterns of root-associated fungi depended on fungal abundance, fungal functional group, fungal taxa, biotic and abiotic niche hypervolumes of fungal OTUs.
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影响因子：
9.4
作者：
Peay, Kabir G.;Bruns, Thomas D.
通讯作者：
Bruns, Thomas D.
影响因子：
1.5
作者：
P. Ramsay
通讯作者：
P. Ramsay
影响因子：
2.8
作者：
Zhihua Zhou;M. Miwa;Y. Matsuda;T. Hogetsu
通讯作者：
Zhihua Zhou;M. Miwa;Y. Matsuda;T. Hogetsu
影响因子：
6.6
作者：
Blonder, Benjamin;Morrow, Cecina Babich;Kerkhoff, Andrew J.
通讯作者：
Kerkhoff, Andrew J.
影响因子：
3.9
作者：
Liang, Y;Guo, LD;Ma, KP
通讯作者：
Ma, KP