Natural Regeneration of Tree Species in a Cloud Forest in Santa Catarina, Brazil

Abstract

-This paper aims at characterizing the tree species natural regeneration and evaluating the relation of this stratum to both the adult component and the environmental variables in a fragment of a cloud forest in Santa Catarina, Brazil. In each of 25 20 × 20 m plots, where the adult component and environmental variables have previously been evaluated, subplots of different sizes varying according to plants' height were then allocated as follows: Class 1 -plants with a height varying from 0.15 cm up to 1 m, being evaluated within 5 m 2 ; Class 2 -plants with a height varying from 1 up to 3 m, being evaluated within 10 m 2 ; Class 3 -plants with a height greater than 3 m and DBH smaller than 5 cm, being evaluated within 20 m 2 . Data have been analyzed with regard to the determination of diversity (Shannon index), evenness (Pielou), Natural Regeneration Index (NRI), similarity with the adult component (Jaccard and Bray-Curtis), floristic-structural organization (Nonmetric Multidimensional Scaling -NMDS) and their relation to environmental variables. A total of 518 individuals distributed in 28 species were sampled. The low values of Shannon index (2.51 nat/ind) and evenness (0.75) suggest low diversity and elevated ecological dominance. The highest NRI has been found in the species Symphyopappus itatiayensis (Hieron.) R.M. King & H.Rob (19.36%). The similarity with the adult component were of 0.45 (Jaccard) and 0.24 (BrayCurtis), demonstrating a low overall similarity (<0.50). The soil compaction was the only variable that has shown a relation with regeneration, which can be related to cattle's presence in the fragment.Keywords: Phytosociology; Araucaria Forest; Forest management. REGENERAÇÃO NATURAL DE ESPÉCIES ARBÓREAS EM UMA FLORESTA NEBULAR EM SANTA CATARINA, BRASILRESUMO -Os objetivos do presente estudo foram caracterizar a regeneração natural arbórea e relacionar esse estrato com o componente adulto e com variáveis ambientais em um fragmento de floresta nebular em Santa Catarina. Em cada uma das 25 parcelas de 20 × 20 m, onde previamente foi realizado um estudo com caracterização do componente adulto e de variáveis ambientais, foram estabelecidas subparcelas, com tamanhos diferenciados de acordo com o tamanho das plantas, para a avaliação dos regenerantes: Classe 1, plantas com altura de 0,15 cm até 1 m, avaliadas em 5 m²; Classe 2, plantas com altura entre 1 e 3 m, avaliadas em 10 m², e; Classe 3, plantas com altura maior que 3 m e DAP menor que 5 cm, avaliadas em 20 m². Foram determinadas: diversidade (índice de Shannon), equabilidade (Pielou), Índice de Regeneração Natural (IRN), 1074Revista Árvore, Viçosa-MG, v.40, n.6, p.1073-1082, 2016 DALLA ROSA, A. et al.

Natural regeneration in a mixed ombrophilous forest remnant in southern Brazil

“…Among the five species best positioned in the density ranking in the regenerating component of PEAR, only Cupania vernalis, Casearia decandra and Matayba elaeagnoides are common with those best positioned in other fragments of MOF in the south of SC (Higuchi et al 2015;Maçaneiro et al 2016;Duarte et al 2019) and in Rio Grande do Sul state (Silva et al 2010a). There was also no coincidence between the 10 species with the highest rate of natural regeneration between this and the study of regeneration in upper montane MOF in SC (Rosa et al 2016). These studies demonstrate the great floristic and structural variation in the regenera ting tree component among the several fragments of MOF in Brazil, and emphasize the importance of them for the restoration projects of MOF throughout its natural range.…”

“…Some studies on natural regeneration of MOF have been developed in SC (e.g. Caldato et al 1996;Meyer et al 2013;Fiorentin et al 2015;Higuchi et al 2015;Maçaneiro et al 2016;Rosa et al 2016;Duarte et al 2019;Vefago et al 2019). Caldato et al (1996) found that, although Araucaria angustifolia was the dominant species in the forest canopy, it did not show individuals in natural regeneration.…”

Diversidad De Árboles Y Arbustos en La Reserva Privada Cerro Chucantí en Darién, Panamá

“…Para la zona baja se encontró la familia Rubiaceae con 15.1% fue la más abundante en la P2 y la familia Myrtaceae con 27.1% fue la más abundante en la P2.1. Dalla Rosa et al (2016) encontraron que algunos géneros de la familia Myrtaceae, son componentes principales en la regeneracion de un bosque nuboso ubicado en Brazil. La dominancia de estas familias podría estar ligadoa la gran actividad de aves registradas por Montañez & Angehr (2007) en Chucantí, favoreciendo así la dispersión de sus semillas.…”

Dynamics of natural regeneration after disturbance in a remnant of Mixed Ombrophilous Forest in southern Brazil

“…Barroso, Ilex paraguariensis A. St.-Hil., Mimosa scabrella Benth., Cedrella fissilis Vell., Roupala brasiliensis Klotzsch, in addition to numerous species belonging to the Myrtaceae family (Higuchi et al, 2012a(Higuchi et al, , 2012b(Higuchi et al, , 2015Dalla Rosa et al, 2016).…”