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ŠUMARSKI LIST 11-12/2021 str. 45     <-- 45 -->        PDF

The total number of ECM fungal taxa recorded at the site Info center was somewhat higher than the one recorded at the site Brankovac (Tab. 2, Supplement Tab. 1). At both sites, a similar number of ECM fungal taxa was recorded per soil sample. The total number of vital ECM root tips counted in the sessile oak stand at Info center was almost 50% higher than at Brankovac. Although the total number of recorded ECM fungal taxa was higher at the site Info center, the average number of ECM fungal taxa and values of diversity indices calculated per soil sample were higher at the site Brankovac (Tab. 2).
In soil samples taken in sessile oak stands at sites Info center and Brankovac, 26 ECM fungal taxa were recorded in total (Fig. 1). Nine ECM fungi were identified to a species level, 13 to a genus level, one to a family level, two to an order level, and one ECM fungus remained unidentified. Among all observed ECM fungi only Tomentella sublilacina, Lactarius quietus and Cenococcum geophilum were recorded at both sites. At the site Brankovac, the most abundant ECM fungi were cf. Tomentella sp. 2 and Lactarius quietus with relative abundance higher than 20%, then Inocybe sp. which made association with 10% of all root tips. At the site Brankovac dominating ECM fungus, identified as Entolomataceae sp., was associated with almost 30% of all ECM root tips, while Tuber sp. 2 and Xerocomus cisalpinus had relative abundance higher than 10%. At both sites three most abundant ECM fungi associated with more than 50% of all ECM roots (Fig. 1).
At the site Info center dominant fungal taxonomic families were Thelephoraceae, Russulaceae, and Inocybaceae which together encompassed more than 75% of all vital ECM root tips (Fig. 2A). Moreover, these three families were the most species-rich families at this site (Fig. 3A). On the other hand, at site Brankovac the most abundant families were Entolomataceae, Tuberaceae, Russulaceae, and Boletaceae and their individual relative abundances were above 10% (Fig. 2B). However, family Russulace was the most species-rich at this site followed by Tuberaceae and Thelephoraceae (Fig. 3B). At both sites, ECM fungi belonging to the phylum Basidiomycota dominated the ECM community. ECM fungi belonging to Ascomycota were more abundant at the site Brankovac in comparison with Info center (data not shown).
At the site Info center short distance ET dominated, followed by contact ET and medium-distance ET, while long-distance ETs were not found at all. On the other hand, at the site Brankovac the most abundant was contact ET followed by short-distance ET and medium- distance ET, while long-distance ET was the least abundant (Tab. 3).