Sucessão Em Fragmentos Florestais Altomontanos No Sul Do Brasil: Uma Abordagem Florístico-Estrutural E Filogenética

Duarte, Edilaine; Silva, Ana Carolina da; Higuchi, Pedro; Larsen, Janaina Gabriela; Ortiz, Danielle Cristina; Gross, Aline; Turmina, Eliana; Aguiar, Jéssica Thalheimer de; Vefago, Manoela Bez; Schneider, Chaiane Rodrigues; Siqueira, Silvane de Fátima; Lemos, Angela Camila; Ribeiro, L. de S.

doi:10.5902/1980509833349

Cited by 4 publications

(6 citation statements)

References 16 publications

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“…In turn, forest succession is an expected process for past deforested areas (Rocha et al 2016), and taking into account the limiting environmental conditions in the studied regions (e.g. frosts), the group of pioneer species has an important role in facilitating the succession process (Duarte et al 2018). We also observed variations in the speed of the vegetational succession process.…”

Section: Discussionmentioning

confidence: 67%

“…i) The quality of the propagules source was summarized by a synthetic variable related to the floristic-structural composition of the adjacent forest fragment and the distance from each plot to the fragment edge. The tree communities data (trees over 5 cm of diameter at breast height) obtained from Duarte et al (2018) were ordered by a Principal Coordinates Analysis (PCoA). We assumed that the ordination of the community data from adjacent forest fragments would summarize the quality of vegetation as a potential propagules source.…”

Section: Methodsmentioning

confidence: 99%

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Key factors affecting succession in upper montane forest areas of "Planalto Sul Catarinense" Region, Brazil

et al. 2021

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The understanding of the succession process is a fundamental condition in defining strategies for the conservation and sustainable use of forest ecosystems. Therefore, we aimed at testing which ecological factors affect short-term successional changes in the uppermontane forests of the "Planalto Sul Catarinense" Region, Brazil. We evaluated the influence of propagules source, soil seed bank, edaphic and topographic variables, nucleating elements and natural regeneration floristic-structural composition on demographic rates of tree-shrub regenerating component in three disturbed open vegetation areas at São Joaquim National Park. We inventoried the regenerative component in 2014, 2015 and 2016, within one 20x100 m transect in each area. Afterwards, demographic rates were determined for each period. The influence of explicative variables on demographic rates of the regenerating component was tested through the Generalized Least Square (GLS) model. We found an increment in both individuals and richness over time. When analyzing the influence of the explanatory variables on the speed of the successional process, we observed that only the floristicstructural composition of the natural regeneration was determinant. We conclude that the speed of the represented succession is, to a large extent, a feature related to the phase of the successional trajectory in which the vegetation is found.

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Section: Discussionmentioning

confidence: 67%

Section: Methodsmentioning

confidence: 99%

Key factors affecting succession in upper montane forest areas of "Planalto Sul Catarinense" Region, Brazil

et al. 2021

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“…A riqueza de espécies observada ao longo dos anos, tanto para o componente adulto (34, 35 e 31) quanto para o regenerante (29, 33, 32 e 31), caracterizou-se por uma relativa estabilidade, sugerindo que, em um curto período de tempo (< 10 anos) e na ausência acentuada de distúrbios de larga escala, essa propriedade da vegetação não apresente grandes modificações em formações florestais tardias. Ainda, os valores encontrados são semelhantes aos observados em outros fragmentos florestais altomontanos da região (DUARTE et al, 2018;SÜHS et al, 2019). Porém, quando comparados aos valores referentes às áreas situadas em menores pisos altitudinais, a riqueza pode ser considerada baixa (SANTOS et al, 2018).…”

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Impacto antrópico na dinâmica de uma floresta nebular do planalto catarinense

et al. 2021

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O objetivo do presente estudo foi investigar a dinâmica da comunidade arbórea adulta e regenerante em um fragmento de Floresta Nebular em Urubici, Santa Catarina, sujeito ao impacto de gado. Os inventários dos indivíduos arbóreos adultos (diâmetro na altura do peito – DAP ≥ 5 cm) foram realizados em 2011, 2015 e 2019, e dos regenerantes arbóreos (DAP 5 cm), em 2013, 2015, 2017 e 2019. Para o componente adulto, a amostragem foi realizada em 25 parcelas de 20 × 20 m alocadas de forma sistemática no fragmento. Em cada uma dessas parcelas também foram coletadas variáveis edáficas e topográficas. O componente regenerativo arbóreo foi avaliado em subparcelas conforme classe de tamanho das plantas (classe 1: plantas com altura de 0,15 cm até 1 m, em 5 m2; classe 2: plantas com altura acima de 1 m e até 3 m, em 10 m2, e classe 3: plantas com altura maior que 3 m e DAP 5 cm, em 20 m2). Foram calculadas as taxas demográficas para a comunidade e as populações de indivíduos adultos e regenerantes. Utilizaram-se Árvores de Regressão (AR), para testar a influência das variáveis ambientais sobre as taxas de dinâmica dos regenerantes, e Análises dos Componentes Principais (PCA), para sintetizar os gradientes representados pelas taxas de dinâmica entre populações. No último período, 2015-2019, a floresta apresentou perda em indivíduos e em área basal, o que sugere um processo de desestruturação. Para os indivíduos regenerantes, as variáveis mais influentes na dinâmica estiveram relacionadas com a fertilidade do solo, os teores de H+Al, a cota altitudinal e a compactação dos solos. Para a conservação da área, medidas, como o cercamento contra entrada de gado, são essenciais para a manutenção da floresta ao longo do tempo.

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“…In turn, Crinodendron brasiliense and Eugenia uruguayensis stood out among the areas in the late succession stage. Crinodendron brasiliense, an endemic species in high altitude regions of the South Plateau of Santa Catarina State (Duarte et al 2018), has wind-dispersed fruits and soft wood. On the other hand, E. uruguayensis, like many other Myrtaceae species, has high wood density and animal dispersed fruits.…”

Section: Discussionmentioning

confidence: 99%

“…Characterization of the succession stages and information on the history of the areas were provided by the Park administration and through field observations, with the latter based on the studies by Duarte et al (2018), who assessed some of these forest fragments (Silveira et al 2021).…”

Section: Methodsmentioning

confidence: 99%

Functional composition of subtropical highland forests in different successional stages in southern Brazil

Silveira¹,

Silva²,

Duarte³

et al. 2021

Bosque (Valdivia)

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Ecological succession is one of the most important processes in forest ecosystems, still poorly understood in the highland Araucaria forests of Southern Brazil. Here we investigated this process by describing functional composition changes in response to a vegetation successional mosaic in four forest fragments in the municipality of Urubici, State of Santa Catarina, Brazil. Two fragments were classified as in advanced stage of succession and two were classified in early stage. The following functional traits were determined: wood density, leaf area, specific leaf area, dispersal syndrome and leaf phenology. For each fragment, we determined the community weighted mean (CWM) and the functional diversity (RaoQ). Data were analyzed by descriptive statistics, t and Mann-Whitney tests and Principal Components Analysis. We found that the successional stage is a relevant source of functional heterogeneity. At the advanced-successional stage, tree communities have harder woods, more membranous and semi-deciduous leaves and higher functional diversity. Conversely, at the early successional stages, forests have softer wood, more coriaceous leaves and lower functional diversity. We concluded that the studied forests showed a high functional composition heterogeneity, partially determined by a successional mosaic. While perennial species with lower values of specific leaf area and wood density predominated in the early successional areas, semi-deciduous species with higher values of specific leaf area and wood density prevailed in the late successional ones.

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Sucessão Em Fragmentos Florestais Altomontanos No Sul Do Brasil: Uma Abordagem Florístico-Estrutural E Filogenética

Cited by 4 publications

References 16 publications

Key factors affecting succession in upper montane forest areas of "Planalto Sul Catarinense" Region, Brazil

Key factors affecting succession in upper montane forest areas of "Planalto Sul Catarinense" Region, Brazil

Impacto antrópico na dinâmica de uma floresta nebular do planalto catarinense

Functional composition of subtropical highland forests in different successional stages in southern Brazil

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