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首页> 外文期刊>Plant and Soil >Disturbance of forest by trampling: Effects on mycorrhizal roots of seedlings and mature trees of Fagus sylvatica
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Disturbance of forest by trampling: Effects on mycorrhizal roots of seedlings and mature trees of Fagus sylvatica

机译：践踏对森林的干扰：对浅景江幼苗和成熟树木的菌根根系的影响

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摘要

The effects of disturbance by recreational activities (trampling) on changes in soil organic matter (SOM) and on mycorrhizal roots of seedlings and mature trees were studied in four stands of a beech (Fagus sylvatica L.) forest near Basel, Switzerland. At each site, comparable disturbed and undisturbed plots were selected. Disturbance reduced ground cover vegetation and leaf litter. Beech seedlings had lower biomass after disturbance. Ergosterol concentration in seedling roots, an indicator of mycorrhizal fungi, was lower in two of the four disturbed plots compared to undisturbed plots; these two disturbed sites had especially low litter levels. Based on ergosterol measurements, mycorrhizas of mature trees did not appear to be negatively affected by trampling. Total fine roots and SOM were higher in the disturbed than in the undisturbed plots at three sites. At the fourth site, fine roots and SOM in the disturbed areas were lower than in the undisturbed areas most probably due to nutrient input following picnic activities. Principal component analysis revealed a close correlation between SOM and fine roots of mature trees as well as litter and seedling biomass. Trampling due to recreational activities caused considerable damage to the vegetation layer and in particular to the beech seedlings and their mycorrhizal fine roots, whereas, roots of mature trees were apparently resilient to trampling.
机译：在瑞士巴塞尔附近的山毛榉（Fagus sylvatica L.）山毛榉林的四个林分中研究了娱乐活动（踩踏）对土壤有机质（SOM）变化以及幼苗和成熟树木菌根的影响。在每个站点，选择可比较的受干扰和不受干扰的地块。干扰减少了地表植被和枯枝落叶。山毛榉幼苗扰动后生物量较低。与不受干扰的地块相比，在四个受干扰地块中的两个中，苗根中麦角固醇的浓度是菌根真菌的指示剂，其含量较低。这两个受干扰的地点的垃圾水平特别低。根据麦角固醇测量，成熟树木的菌根似乎没有受到践踏的负面影响。在三个地点，受干扰的总细根和SOM高于未受干扰的地块。在第四个地点，受干扰地区的细根和SOM低于未受干扰地区，这很可能是由于野餐后的营养输入。主成分分析显示，SOM与成熟树木的细根以及凋落物和幼苗生物量之间密切相关。由于娱乐活动造成的践踏对植被层，特别是对山毛榉幼苗及其菌根细根造成了相当大的损害，而成熟树木的根显然具有践踏的弹性。

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