营养水平
生物
菌丝体
土壤生物学
丰度(生态学)
生态学
外生菌根
菌根
植物
泰加语
无脊椎动物
共生
土壤水分
遗传学
细菌
作者
Andrey G. Zuev,Mikhail Potapov,Alexei V. Tiunov,А.К. Сараева
标识
DOI:10.1016/j.ejsobi.2023.103519
摘要
Ectomycorrhizal fungi are a prominent component of the soil biota of boreal forests, but the role of mycorrhizal mycelium as a food source for soil Collembola remains controversial. We addressed this question in a trenching experiment in young (70 years old) and old (180 years old) stands of Scotch pine, combined with stable isotope analysis. Trenching halved the biomass of ectomycorrhizal mycelium, estimated using in-growth mesh bags. In the young forest, the abundance of two euedaphic Collembola species, Mesaphorura yosiii and Willemia anophthalma, decreased after trenching by 99 and 97% respectively, while in the old forest the abundance of Collembola was not affected. In both forests, trenching reduced δ15N values of the dominant euedaphic species Isotomiella minor and W. anophthalma, indicating a shift in trophic niches. Thus, we obtained convincing evidence of species-specific trophic links of euedaphic Collembola species to the mycelium of mycorrhizal fungi.
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