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The work had as objective to know the density and the composition of forest species of the litter bank of the litter and the soil in a recovery area, in Guarapuava, PR. Fifty - five plots (100m² each) were installed, the forest census was carried out, and three basal areas were defined: basal area - T1, basal area - T2 and basal area - T3. Were 25 soil and 25 litter samples were collected at the end of each season and taken to the greenhouse for a period of 8 months for seedling emergence, with monthly assessment, identification and counting. 17.303 individuals belonging to 80 species and 42 families were identified. Of these, 89.6% are herbaceous, belonging to 62 species and distributed in 31 families and 10.4%, are forest / shrub species, belonging to 18 species and 14 families. The most representative forest / shrub species were M. scabrella and Baccharis sp. with 492 and 1,051 individuals, respectively. The winter season had the highest number of seedlings, followed by summer and autumn, differing statistically from spring. In the inner part of the forest, a greater number of species, individuals and forest species were sampled than in relation to the edge, a trend observed in seasons and also in relation to soil samples when compared to litter samples. The similarity between the seed bank and the regeneration was high (0.48) and between the seed bank and the arboreal stratum was lower (0.28). It is suggested that the area without intervention has been able to develop and establish new species.

This work verified the influence of climatic variables on the diametric increase of forest species Schinus terebinthifolius Raddi., Mimosa scabrella Benth. and Bauhinia forficata Link in a forest undergoing recovery in 2007, in Guarapuava, Paraná. 43 trees of the species S. terebinthifolius, 38 of the species M. scabrella and 30 of the species B. forficata were sampled. Two samples were taken from each tree, the growth rings were marked and measured with the Image J Software, the measurements were subjected to quality control with the Cofecha Software and the timelines generated with the Arstan Software. The climatic variables were evaporation, insolation, annual precipitation (mm), maximum, average and minimum temperature (ºC) and relative humidity, obtained for the period from 2007 to 2018, made available by the meteorological station of the Universidade Estadual do Centro-Oeste - UNICENTRO, Guarapuava - PR. Pearson's Correlation, factor analysis and main components were used to verify the relationship between climatic variables and increment. The results showed a significant positive correlation of the increase in diameter of the species B. forficata and S. terebinthifolius with the variables evaporation, precipitation, maximum, average and minimum temperature and negative with the variables insolation and relative humidity. The species M. scabrella presented a significant positive correlation with the variables evaporation, precipitation and minimum temperature, and a negative one with the variables insolation and relative humidity and did not present a significant correlation with the variables maximum and average temperature. The characteristic years of high and low growth are the same for the three species, which showed a high correlation between chronologies and high sensitivity to climatic factors. The variables precipitation and temperature influenced the growth of the species. The average increase in diameter for M. scabrella was 1.51 cm.year-1, 1.09 cm.year-1 for S. terebinthifolius and 0.73 cm.year-1 for B. forficata. Due to the conditions of the study area due to anthropic actions, actions such as physical isolation are recommended, so that the maintenance of the natural ecological processes of the forest is favored. Studies on the dendrochronology of trees that were implanted in degraded environments and submitted to recovery are necessary to understand the relationship between the growth of forest species and climatic factors and its importance for the maintenance of ecological functions in the place.

Avaliou-se a dinâmica florestal, em termos de incrementos, ingresso e mortalidade, de duas áreas, uma de floresta secundária e outra sob sistema silvipastoril, no município de Turvo (PR). Para o levantamento, foram medidas parcelas permanentes totalizando 1,68 e 1,8 ha, respectivamente. Todos os indivíduos com diâmetro à altura do peito maior que 5 cm foram considerados. Utilizou-se o centro de classe para análise das espécies por meio da cadeia de Markov. No ano de 2018, a floresta secundária apresentou 1.531 ind./ha-1, distribuídos em 33 famílias, 52 gêneros e 69 espécies. Já o sistema silvipastoril apresentou 594 ind./ha-1, com 22 famílias, 31 gêneros e 43 espécies. A distribuição diamétrica entre as áreas mostrou diferenças no número de indivíduos nas classes de 5 a 20 cm. O incremento de 2012 a 2018 foi de 6,11 m2 ha-1 na floresta e de 5,33 m2 ha-1 no silvipastoril. Concluiu-se que as áreas apresentam regeneração natural, evidenciada pelo padrão de distribuição diamétrica, e, apesar de ter menor número de ingressos, a área silvipastoril teve incremento periódico superior ao da área de floresta secundária. A área silvipastoril é prejudicada por ações antrópicas, de animais e climáticas, fatores que acentuam ainda mais a necessidade de estratégias de manejo para a sua conservação.

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