Regeneração natural de espécies arbóreas em diferentes comunidades de um remanescente de floresta ombrófila mista

Callegaro, Rafael Marian; Longhi, Solon Jonas; Andrzejewski, Camila; Araújo, Maristela Machado

doi:10.1590/0103-8478cr20131098

Cited by 9 publications

(7 citation statements)

References 8 publications

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“…O manejo de florestas tropicais influencia na regeneração natural, crescimento, recrutamento e mortalidade de indivíduos que compõem as comunidades destas florestas (AREVALO et al, 2016;CALLEGARO et al, 2015;DARRIGO et al, 2016;DIONISIO et al, 2017;RIVETT et al, 2016;SCHWARTZ et al, 2014), sendo importante avaliar a dinâmica por espécies em florestas tropicais, ao longo do tempo para subsidiar tomadas de decisões silviculturais para cada espécie em questão.…”

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Incremento, recrutamento e mortalidade pós-colheita de Duguetia spp. na Floresta Nacional do Tapajós, Pará

Dionísio¹,

Carvalho²,

Schwartz³

et al. 2018

Sci. For.

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Conhecer o crescimento das espécies de um povoamento florestal, principalmente daquelas de interesse econômico, é de fundamental importância para o manejo florestal sustentável. Nesse sentido, avaliou-se o processo dinâmico de incremento, recrutamento e mortalidade da população de Duguetia spp. (envira-surucucu), no período de 1983-2012, em uma área de 180 hectares, sob a responsabilidade da Embrapa Amazônia Oriental, localizada na Floresta Nacional do Tapajós. Os dados foram coletados em 48 parcelas permanentes de 0,25 ha (50 m x 50 m), divididas em 25 subparcelas de 10 m x 10 m, onde foram medidas e identificadas todas as árvores com DAP (diâmetro a 1,30 do nível do solo) ≥ 5 cm. Recrutamento foi considerado como sendo o número de árvores que atingiram 5 cm de diâmetro em duas medições consecutivas, e mortalidade o número de árvores com DAP ≥ 5 cm encontradas mortas entre duas medições consecutivas. A exploração de impacto reduzido não afetou a estrutura da população de Duguetia spp. Trinta anos após a exploração, a espécie continuou apresentando distribuição diamétrica do tipo J-reverso e mostrou equilíbrio entre as taxas de recrutamento e mortalidade, além de semelhança no incremento diamétrico entre as áreas exploradas e não explorada. A exploração beneficiou o crescimento dos indivíduos de Duguetia spp., que teve maior incremento na classe de diâmetro DAP ≥ 25 cm. Palavras-chave: Crescimento de árvores; dinâmica da floresta; exploração de impacto reduzido; forma de J-reverso.

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Incremento, recrutamento e mortalidade pós-colheita de Duguetia spp. na Floresta Nacional do Tapajós, Pará

Dionísio¹,

Carvalho²,

Schwartz³

et al. 2018

Sci. For.

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“…This species also stands out in the southern portion of the Atlantic Forest, due to its high geographical range, abundance and different habitats in which they occur (Caiafa and Martins 2010;Fontana et al 2016). Nectandra megapotamica presented the highest density and frequency in the PEAR tree component (Passos et al 2021), in addition to being recorded with high abundance and importance value in other studies (Mauhs and Backes 2002;Bianchini et al 2003;Callegaro et al 2015).…”

Section: Discussionmentioning

confidence: 74%

Natural regeneration in a mixed ombrophilous forest remnant in southern Brazil

Passos¹,

Prado²,

Fontana³

et al. 2021

NBC

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The study of forest regeneration allows the diagnosis of conservation status of fragments and estimating population parameters that are essential for management projects. This study evaluated the structure, diversity and dynamics of the tree regenerating component of a remnant of mixed ombrophilous forest, aiming to support management actions for this forest type. The study was developed at the Parque Estadual das Araucárias (PEAR), located in the western region of the state of Santa Catarina, southern Brazil. A total of 100 plots of 25 m2 (0.25 ha) were allocated, all individuals with height ≥ 1.0 m and DBH < 5 cm were sampled. Shannon’s diversity index (H’), Pielou’s equability index (J) and total natural regeneration rate (TNR) were estimated. We sampled 1,425 individuals from 99 species and 39 families, with an estimated total density of 5,700 individuals by hectare. The richest families were Fabaceae (13), Myrtaceae (10) and Lauraceae (7). The H’ was 3.76 and the J was 0.80. The TNR rate ranged from 0.05 to 8.12%, highlighting Trichilia elegans, with the highest rate and Araucaria angustifolia with low potential for natural regeneration. The analysis of the results indicated a high diversity in the regenerating component of the PEAR compared to other studies, probably because the area presents itself as a successional mosaic due to past disturbances.

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“…With this decrease, Allophylus guaraniticus became the species with the highest density in the community. In a study by Callegaro et al (2015), A. guaraniticus it was described as one of the species with the highest regeneration potential in the studied community. In a study by Vefago et al (2019), this specie also was among the most representative.…”

Section: Structural Dynamics Of Natural Regenerationmentioning

confidence: 95%

Dynamics of natural regeneration in a fragment of a Mixed Ombrophilous Forest in the upland region of Santa Catarina, Brazil

Gonçalves¹,

Schorn²,

Santos³

et al. 2022

Ciênc. Florest.

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This study aimed to analyze the temporal changes in the floristic composition and regeneration structure in a remnant of Mixed Ombrophilous Forest that has been without interventions for decades. Two surveys were undertaken for the study; the first survey was conducted in 2012, and the second in 2017. The experimental area comprised 20 circular plots of 2.5 m radius, where was it performed the quantification of the regenerants, measurement of individual tree heights, and identification of the ecological group that each surveyed species belonged. All individuals with a minimum height of 0.50 m and a circumference at breast height of less than 15 cm were measured. Approximately 12,382 ind ha-1 were found in 2012 and 11,185 ind ha-1 in 2017. Only the following species increased their abundance per hectare in 2017 compared to the previous survey: Dalbergia frutescens (280.3 ind ha-1), Myrsine coriacea (178.3 ind ha-1), Allophylus guaraniticus (76.4 ind ha-1), Bernadia pulchella (51.0 ind ha-1), Casearia obliqua (50.9 ind ha-1), Casearia decandra (25.5 ind ha-1), and Luehea divaricata (25.5 ind ha-1). The remaining species had a negative balance or disappeared from the study. Ecological group analysis indicated the gradual replacement of shadow-tolerant climax species by pioneer and light-demanding climax species. The most representative species identified on both occasions did not undergo major changes, indicating that they are more likely to remain in the studied area. The results indicated that the studied remnant forest is in an advanced phase of succession; however, it presents punctual alterations that reflect its floristic and ecological dynamics.

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Regeneração natural de espécies arbóreas em diferentes comunidades de um remanescente de floresta ombrófila mista

Abstract: RESUMO A diversidade de ambientes encontrados em florestas naturais pode influenciar na regeneração natural e futuramente na dinâmica sucessional. Nesse contexto, objetivou-se avaliar a regeneração natural de espécies arbóreas em diferentes comunidades (grupos florísticos) de uma

Cited by 9 publications

References 8 publications

Incremento, recrutamento e mortalidade pós-colheita de Duguetia spp. na Floresta Nacional do Tapajós, Pará

Incremento, recrutamento e mortalidade pós-colheita de Duguetia spp. na Floresta Nacional do Tapajós, Pará

Natural regeneration in a mixed ombrophilous forest remnant in southern Brazil

Dynamics of natural regeneration in a fragment of a Mixed Ombrophilous Forest in the upland region of Santa Catarina, Brazil

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