The aim of this article was to evaluate the likelihood of failure of trees protected by law located at Curitiba squares, Paraná, through the adaptation of the tree risk assessment proposed by the International Society of Arboriculture (ISA). Among all 14 trees analyzed, 11 types of defects were identified in the trunk, with the predominance of canker and codominant stems; 12 in the crown, with the presence of dead and broken branches; and seven in the root system, where root lifting was the most recurrent problem. The evaluation of the tree risk assessment indicated that eight of the 14 trees demonstrated moderate risk (57.14 %), presenting 5 to 12 defects; five had a low risk (35.71 %), with one to seven defects; and one was categorized as a high risk of failure (7.14 %), which had 17 defects.Half of the trees presented the risk assessment associated with defects in the trunk, two of them with problems in the crown, and two others had more defects in the root system. These results highlight the importance of monitoring and maintaining the quality of urban forests, a fact that contributes to the safety and well-being of the population that visit Curitiba squares. RESUMENEl objetivo de este artículo fue evaluar la probabilidad de daño de los árboles protegidos por la ley ubicados en las plazas de Curitiba, Paraná, mediante la adaptación de la evaluación de riesgo de árboles propuesta por la Sociedad Internacional de Arboricultura (ISA). Se identificaron 11 tipos de defectos en el tronco, con predominio de tallos cancerosos y codominantes; 12 en la corona, con la presencia de ramas muertas y rotas; y siete en el sistema de raíz, cuya elevación de raíz fue el problema más recurrente. La evaluación de la evaluación del riesgo de árboles indicó que 8 de los 14 árboles mostraron un riesgo moderado (57,14 %), presentando de 5 a 12 defectos; cinco tuvieron un riesgo bajo (35,71 %), con uno a siete defectos; y uno se clasificó como un alto riesgo de fracaso (7,14 %), que tenía 17 defectos. La mitad de los árboles presentaron la evaluación de riesgo asociada con defectos en el tronco, dos de ellos a problemas en la corona y otros dos tenían más defectos en el sistema radicular. Estos resultados resaltan la importancia de monitorear y mantener la calidad de los bosques urbanos, un hecho que contribuye a la seguridad y el bienestar de la población que visita las plazas de Curitiba.Palabras clave: arboricultura, árbol protegido, daño en árboles, bosque urbano.
Urban forest planning is necessary to avoid problems coming from the introduction of trees into urban spaces. Within the planning process, how space can be occupied on sidewalks is an important item to indicate which species can be planted according to the canopy characteristics . The objective of this study was to analyze morphometric indexes, to classify the growth pattern and to determine the canopy architecture of ten species planted in the urban forest of the cities Curitiba and Pinhais, Paraná, under conditions of free growth, without competition. The sampled species were characterized by the variables diameter at breast height, total height and canopy height and canopy radius in the north, south, east and west directions, which helped to characterize the morphometry of the species. The canopy architecture was classified according to structural models A 60% of crown ratio. Libidibia ferrea and Koelreuteria paniculata presented the greatest amplitude regarding the canopy form, between vertical elliptic, round and horizontal elliptic. Half of the species were fit in the canopy architecture model of the Koriba type, two in the Troll model and one in each of the D'Attim, Leeuwenberg and Mangenot types.
No ambiente urbano não somente as árvores são importantes, mas também os canteiros onde estão plantadas e as composições paisagísticas. O objetivo deste trabalho foi avaliar a percepção dos moradores da Regional Matriz em Curitiba (Paraná) em relação aos canteiros da arborização viária. A pesquisa foi realizada utilizando os canteiros da arborização viária com presença de composição paisagística em 16 bairros e seis zonas residenciais da Regional Matriz. Fez-se uma amostragem estratificada totalizando 82 residências. As coletas de campo foram efetuadas no mês de abril de 2017 e consistiram em aplicar questionário com 10 perguntas para cada residência amostrada, em que se abordaram o perfil dos entrevistados e a percepção deles sobre os canteiros. Em 82 residências foram encontradas pessoas disponíveis para participar da pesquisa. Grande parte dos entrevistados (63) respondeu que aquele espaço tinha valor estético. Boa parte dos moradores (77%) que participou da pesquisa soube citar o nome de pelo menos uma espécie plantada em frente à sua casa e, destes, apenas 23% lembraram de uma espécie nativa. Conclui-se que os moradores reconhecem a função estética dos canteiros e contribuem com a composição paisagística destes em frente à sua residência.
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