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Pontificia Universidad Javeriana (2017)

Rasgos funcionales fúngicos en relación con recuperación de incendios en bosque seco (Departamento del Huila)

Orduz Tovar, Sergio Andrés

Titre : Rasgos funcionales fúngicos en relación con recuperación de incendios en bosque seco (Departamento del Huila)

Auteur : Orduz Tovar, Sergio Andrés

Université de soutenance : Pontificia Universidad Javeriana

Grade : Magíster en Ciencias Biológicas 2017

Résumé partiel
Forest fires are one of the main problems in tropical dry forest (BsT), affecting not only vegetation cover but also microbial diversity such as filamentous fungi. The latter fulfill indispensable roles in soils such as aggregation, substrate degradation and nutrient cycling, thanks to their morphological, physiological and metabolic characteristics, which are considered functional features (RF) that give for maintenance of several ecosystem services and allow Thus the recovery of soils affected by fires. For this reason, the spatial dynamics of fungal diversity was evaluated after four periods (P1) (<1, <3, <5 and> 12 years) of tropical dry forest (BsT) in Palermo, Huila, . Each area was divided into three quadrants and six samples each (three in the rainy season and three in the dry season). In each zone six soil samples were taken and the fungi density was determined by serial dilutions plate count. In addition, the isolation, morphological identification and characterization of the morphotypes obtained were performed using the accumulated diversity index as a strategy for comparing diversity among study areas. Subsequently, functional traits of each morphotype (radial growth, conidia production, hyphae diameter, pigmentation, UV resistance and temperature resistance) were evaluated to find functional groups by main coördinate analysis (PCO) according to post-fire period (PpI), as well As the interaction between the functional traits evaluated for the BST and the isolated morphotypes which was analyzed by a multivariate linear regression tree (LINKTREE) between functional traits.

Mots clés : Incendio forestal Hongos de suelos Rasgos funcionales

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