Resumo

MUNOZ GUTIERREZ, Liliana; PEREZ MIRANDA, Ramiro; RESENDIZ MARTINEZ, José Francisco  e  REYES ROBLES, Rodolfo. Risk trees in Viveros de Coyoacán National Park, Mexico City. Rev. mex. de cienc. forestales [online]. 2022, vol.13, n.72, pp.201-222.  Epub 22-Ago-2022. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v13i72.1227.

Trees in cities may be a high risk for the human population and its infrastructure, due to their age, poor development, deficient aerial and root physical structure, and from plagues and diseases that can cause slight to fatal accidents. The objective of this study was to evaluate the risk that trees in the Viveros de Coyoacán National Park at Mexico City mean for visitors. Different indicators were used to determine the condition of the site, mensuration characterization, condition and vigor of the trees, classifying them as: 1) extreme risk, 2) high risk, 3) moderate risk and 4) low risk. Twenty-one species were identified with 299 individuals, of which only three species make up 53 % of the total number. In terms of developmental stages, 84.6 % are young trees and 15.4 % adults. 30 % have a DN <20 cm and a height under 15 m, while 51 % are taller than 18 m. 12 % interfere with the electrical network, 37 % with signals and 9 % obstruct the walking paths. 70 % of the trunks show mechanical damages, 50 % have weak unions in the branches and 60 % ulcers or cankers. From their hazard, 32 % are of extreme risk and 12 % of high risk. It is recommended to carry out sanitation pruning and soil decompaction. The criteria and indicators used allow a precise diagnosis of the current state of the trees in the park.

Palavras-chave : Urban green areas; urban forestry; evaluation; state indicators; risk level; urban vegetation.

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