Vertical distribution of an ectomycorrhizal community in upper soil horizons of a young Norway spruce (Picea abies [L.] Karst.) stand of the Bavarian Limestone Alps
Vertical distribution of an ectomycorrhizal community in upper soil horizons of a young Norway spruce (Picea abies [L.] Karst.) stand of the Bavarian Limestone Alps
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DOI：
10.1007/s00572-006-0035-z
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发表时间：
2006-05-01
期刊：
影响因子：
3.9
通讯作者：
Agerer, Reinhard
中科院分区：
文献类型：
--
作者：
Baier, Roland;Ingenhaag, Jan;Agerer, Reinhard
在巴伐利亚石灰岩阿尔卑斯山的白云岩山地（海拔 1,050 米）的 17 年树龄挪威云杉（Picea abies [L.] Karst.）种植园中评估了外生菌根 (ECM) 属的垂直生态位分化。我们确定了 ECM 解剖类型，记录了相应 ECM 根尖的丰度，并将它们分为 ECM 探索类型组，这是指其基质外菌丝体的组织和范围。与矿质土层相比，有机土层中 ECM 的丰度最高。 ECM群落和勘探类型的排序揭示了与土壤层特性相关的隔离。虽然 Cenocaccum geophilum 更喜欢有机土壤层，但 Lactarius spp.、Tomentella spp. 更喜欢有机土壤层。和 Craterellus tubeaeformis 通常在矿质土壤层中最为丰富。 Cenocaccum geophilum 是主要物种，可能是因为在当时的立地条件下竞争力增强。短距离勘探类型（例如 C. geophilum）优先定殖于有机土壤层，而接触类型（例如大多数 Tomentella spp.、C. tubeaeformis）和中距离类型（例如 Amphinema byssoides）主要与下面的 A 地平线相关。因此，土壤层位对ECM的分布及其群落结构具有重要影响。根据土壤层的特定物理化学性质和假设的 ECM 生态生理策略，讨论了 ECM 属和勘探类型的空间生态位分化。
The vertical niche differentiation of genera of ectomycorrhiza (ECM) was assessed in a 17-year-old Norway spruce (Picea abies [L.] Karst.) plantation on a mountainous dolomitic site (1,050 m above sea level) of the Bavarian Limestone Alps. We determined ECM anatomotypes, recorded the abundance of corresponding ECM root tips and classified them into groups of ECM exploration types, which refer to the organisation and the extent of their extramatrical mycelia. The abundance of ECM was highest in the organic soil layers, compared to the mineral soil horizon. The ordination of the ECM communities and of the exploration types revealed segregation related to soil horizon properties. While Cenococcum geophilum preferred the organic soil layers, Lactarius spp., Tomentella spp. and Craterellus tubaeformis were generally most abundant in the mineral soil horizons. Cenococcum geophilum was the predominant species, possibly based on enhanced competitiveness under the prevailing site conditions. The short-distance exploration types (e.g. C. geophilum) preferentially colonised the organic soil layer, whereas the contact types (e.g. most of the Tomentella spp., C. tubaeformis) together with medium-distance types (e.g. Amphinema byssoides) were primarily associated with the underlying A-horizons. Therefore, the soil horizons had an important effect on the distribution of ECM and on their community structure. The spatial niche differentiation of ECM genera and exploration types is discussed in regard to specific physico-chemical properties of soil horizon and the assumed ecophysiological strategies of ECM.