Resumen

ENDARA-AGRAMONT, Angel Rolando et al. Relationship of the establishment of Dendroctonus adjunctus and Arceuthobium vaginatum with the structure of a Pinus hartwegii forest in Nevado de Colima, Mexico. Rev. Mex. Biodiv. [online]. 2025, vol.96, suppl., e965495.  Epub 16-Abr-2026. ISSN 2007-8706.  https://doi.org/10.22201/ib.20078706e.2025.96.5495.

The populations of Pinus hartwegii are established above 3,500 m asl, around the highest mountains in the country, one of them is the Nevado de Colima Volcano National Park, which is affected by Arceuthobium vaginatum and Dendroctonus adjunctus. The objective of the research was to determine the damage caused by both pathogens on the structure and regeneration of the P. hartwegii forest. To this, 384 sampling units were installed (MU of 1,000 m2 each), where forest information associated with mistletoe and bark beetle infestation levels was recorded. According to the results obtained, 20% are attacked by mistletoe and bark beetle. In addition, the elimination of the dominant canopy and reduction of healthy trees > 40 DN is presented in the affected sites. From the above, it is concluded that the high levels of infestation of D. adjunctus and the surface infested by A. vaginatum affect the structure of the forest and, therefore, compromise the establishment of natural regeneration, with the western slope around the volcano the most affected.

Palabras llave : Mistletoe; Bark beetle; Pinus hartwegii; High mountain; Tree stratum.

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