Abstract

SOTO-GIL, Ana Lucila et al. Ectomycorrizal morphotypes in structural variable retention of Pinus patula Schlltdl et Cham. Madera bosques [online]. 2022, vol.28, n.2, e2822388.  Epub Apr 14, 2023. ISSN 2448-7597.  https://doi.org/10.21829/myb.2022.2822388.

One of the forest species most used for timber harvesting is Pinus patula. Currently this species is under forest management in the north forests of Puebla state and in some sites, clearcut regeneration system is applied. This species, like all pine species are depending for their survival on ectomycorrhizae, given the ecophysiological importance of this symbiotic association. The aim of this work was to evaluate the effect of the clearcutting regeneration system on the structure of ectomycorrhizal communities compared with areas with variable structural tree retention of a P. patula forest in Chignahuapan, Puebla. Nine trees were selected within the areas of interest to obtain soil samples and to be able to extract the ectomycorrhized morphotypes, to be characterized both anatomically and its morphology. 3137 ectomycorrhized roots were counted in total, within which 33 different morphotypes were recognized. Four of them dominated more than 50% of the total relative abundance, among them Cenococcum geophilum. There was a negative effect on the diversity of morphotypes among the stands with forest management compared to the retention areas. Finally, it is possible to say that forest harvesting with clearcutting system has a negative impact on the diversity of ectomycorrhizae; however, the maintenance of retention areas can reduce this impact and contribute to the reestablishment of the diversity of ectomycorrhizal communities over time, as it is a diverse genetic reservoir of these communities.

Keywords : complete felling; ecology; ectomycorrhizal; forest management; tree retention; silviculture.

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