Assessment of urban forestry in Aquidauana (MS, Brazil)

Objective: The aim of the present study was to assess urban forestry in the city of Aquidauana (state of Mato Grosso do Sul, Brazil) to contribute to the establishment of a municipal urban afforestation plan. Methodology: Eight quadrants measuring 200 x 500 m were sampled, totaling 23 km of walkways, 59 streets in seven neighborhoods and 1280 trees, corresponding to a sampling intensity of 6.4% (95% precision; 10% error limit). Information was obtained on species, origin, spatial variables and plant health. Originality/Relevance: We present important qualitative and quantitative aspects for the planning and management of urban forests in the city, which may be insufficiently considered by the local public administration. Results: The number of trees per kilometer of walkway is below the recommended figure. We recorded 101 species distributed among 36 families. A high number of native species was found, but exotic species predominated in both number and abundance, especially Moquilea tomentosa (60%). Regarding the spatial component, 46% of the trees were located under power lines and 60% of these trees had some conflict with the grid. Approximately 17% of the trees were closer to the curb than the recommended distance. Among the trees sampled, most (60%) did not present any type of conflict with infrastructure. Tree health merits attention, as less than 10% of the population was categorized as being in an optimum state. Management contributions: We recommend the implantation of legal norms for tree management, including the offer of tree-trimming courses for those involved in this practice in the city, as well as the planting of native species and the adoption of environmental education programs.