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EnglishThe aim of this research was to characterize an environmental structure in the setting of tree natural water springs in a Lower Highland Seasonal Forest, and to verify the relationship between community demography and soil variables as subsidies for species identification in riparian forest recovery programs in similar environments. The research was carried out in the National Forest of Chapeco, located in the west of the state of Santa Catarina in the southern region of Brazil. For this, three water springs were demarcated, where 26 plots of 200m² in each were allocated. All individuals with diameter at 1.30m of soil height ≥5.0cm were measured. Soil samples (0 to 20cm depth) were collected in the plots for chemical and physical analysis. To relate the abundance of the species to the edaphic variables, the Canonical Correspondence Analysis (CCA) was used. A total of 76 species belonging to 64 genera of 36 botanical families were reported in the study area. The families Fabaceae and Myrtaceae presented greater floristic richness. The edaphic variables that most influenced the distribution of the species were aluminum saturation and calcium, magnesium and potassium contents. Specific groups of indicator species were formed for each water spring. The species designated as generalists are the most recommended for the initial filling and recovery of degraded springs. Further rare species and with low density must be included after the initial recovery to increase diversity. Key words: Riparian Forest; Atlantic Forest; Fragmentation; Edaphic Variables; Forest Recovery portuguesO presente trabalho teve como objetivo caracterizar a vegetacao arborea em nascentes de Floresta Latifoliada Subtropical e verificar a relacao entre a demografia da comunidade e variaveis edaficas, como subsidios para indicacao de especies em programas de recuperacao de florestas ciliares de ambientes similares. O trabalho foi realizado na Floresta Nacional de Chapeco, localizada no oeste do estado de Santa Catarina no sul do Brasil. Para isso, foram demarcadas tres nascentes, onde foram alocadas 26 parcelas de 200m2 em cada uma. Todas as arvores com Diâmetro a Altura do Peito (DAP) ≥5,0cm a 1,30m de altura do solo foram mensurados. Coletaram-se amostras de solo (0 a 20cm de profundidade) nas parcelas para analise das propriedades quimicas e fisicas. Para relacionar a abundância das especies com as variaveis edaficas utilizou-se a Analise de Correspondencia Canonica (CCA). Foram encontradas na area de estudo, 76 especies pertencentes a 64 generos de 36 familias botânicas. As familias Fabaceae e Myrtaceae apresentaram maior riqueza floristica. As variaveis edaficas que mais influenciaram na distribuicao das especies foram a saturacao por aluminio e os teores de calcio, magnesio e potassio. Ocorreu a formacao de grupos especificos de especies indicadoras para cada nascente. As especies designadas como generalistas sao as mais recomendadas para a recomposicao de nascentes com a funcao de preenchimento inicial da area. Enquanto as especies raras e de baixa densidade devem ser incluidas apos a recuperacao inicial com a funcao de aumentar a diversidade. Palavras-chave: Floresta ciliar; Mata Atlântica; Fragmentacao; Variaveis ambientais; Recomposicao florestal

Environmental structure and relationships in the setting of natural water springs in a Lower Highland Seasonal Forest in Brazilian South