Lianas, tree ferns and understory species: indicators of conservation status in the Brazilian Atlantic Rainforest remnants, southeastern Brazil

Castello, Ana Carolina Devides; Coelho, Samuel; Cardoso-Leite, Eliana

doi:10.1590/1519-6984.07715

Cited by 10 publications

(8 citation statements)

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“…This fact evidenced the great conservation and succession degree in this site. Tree ferns can be used as indicators of vegetation conservation (Castello et al, 2017) and successional stages of forests (Schmitt and Windisch, 2012).…”

Section: Discussionmentioning

confidence: 99%

Spatial distribution analysis of Dicksonia sellowiana Hook. in Araucaria forest fragments with different sizes

et al. 2019

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Dicksonia sellowiana Hook. (Dicksoniaceae) is target of extractive exploitation and is threatened with extinction. We analyzed the population structure, the spatial distribution pattern of D. sellowiana and its relationship with environmental parameters within three fragments of Araucaria Forest in Rio Grande do Sul, Brazil. The fragments are of different sizes, namely, large (H1LF) with 246 ha, medium (H2MF) with 57 ha and small (H3SF) with 5.2 ha. Within each site, 1 ha was delimited, divided into 100 subplots (100 m2), of which 20 were selected with a draw. In each subplot, counting of the individuals, the registration of the caudice height and the coverage of leaves (SC) (m2), measurements of photosynthetically active radiation (PAR), canopy opening degree (CO), soil moisture (SM) and litter thickness (LT). The temperature (T) was measured inside each site. A total of 792 plants were sampled, of which 551 were concentrated in H1LF, 108 in H2MF and 133 in H3SF. An average of 1320 ha-1 individuals were estimated. Of the total including the three fragments, 96.9% of the individuals are in the first class of height (up to 0.8 m), indicating a great potential of population development. The spatial distribution pattern (AI) was aggregated in the three populations and the plants presented a heterogeneous total coverage, between 4.73 m2 (H2MF) and 2,223.47 m2 (H1LF). The highest values of SC and SM were more related to the distribution of individuals in H1LF whereas the opposite was recorded in H2MF. The highest values of PAR, LT and CO correlated with the distribution of D. sellowiana in H3SF. In addition to revealing that the H1LF population is among the most dense in southern Brazil, the results demonstrated a significant structural distinction between the interior populations of the fragments, in spite of them being located near to one another and being part of the same natural field matrix.

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Section: Discussionmentioning

confidence: 99%

Spatial distribution analysis of Dicksonia sellowiana Hook. in Araucaria forest fragments with different sizes

et al. 2019

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“…In the age of Anthropocene, human impacts have significantly changed the whole biosphere and are threatening ecosystems and biodiversity worldwide [54]. The distribution, diversity, and dynamics of fern assemblages are profoundly affected by human disturbances [8,12,15,[55][56][57][58][59][60][61][62][63][64][65]. Disturbances might modify the external conditions and interspecific interactions to lead to changes in the fern assemblages [15,66].…”

Section: Introductionmentioning

confidence: 99%

Taxonomic, Phylogenetic, and Functional Diversity of Ferns at Three Differently Disturbed Sites in Longnan County, China

Dai

ChunFa

et al. 2020

Diversity

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Human disturbances are greatly threatening to the biodiversity of vascular plants. Compared to seed plants, the diversity patterns of ferns have been poorly studied along disturbance gradients, including aspects of their taxonomic, phylogenetic, and functional diversity. Longnan County, a biodiversity hotspot in the subtropical zone in South China, was selected to obtain a more thorough picture of the fern–disturbance relationship, in particular, the taxonomic, phylogenetic, and functional diversity of ferns at different levels of disturbance. In 90 sample plots of 5 × 5 m2 along roadsides at three sites, we recorded a total of 20 families, 50 genera, and 99 species of ferns, as well as 9759 individual ferns. The sample coverage curve indicated that the sampling effort was sufficient for biodiversity analysis. In general, the taxonomic, phylogenetic, and functional diversity measured by Hill numbers of order q = 0–3 indicated that the fern diversity in Longnan County was largely influenced by the level of human disturbance, which supports the ‘increasing disturbance hypothesis’. Many functional traits of ferns at the most disturbed site were adaptive to the disturbance. There were also some indicators of fern species responding to the different disturbance levels. Hence, ferns may be considered as a good indicator group for environmental stress.

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“…Assim, a análise de sua vegetação é uma importante maneira de avaliar o status de conservação de um ecossistema terrestre (SICHE et al, 2007;CASTELLO;COELHO;CARDOSO-LEITE, 2017), pois os componentes da comunidade vegetal apresentam respostas às variações ambientais por se tratarem de organismos pouco tolerantes às alterações causadas pela degradação (BOSCOLO et al, 2017). Dessa forma, diversos autores (SICHE et al, 2007; CASTELLO; COELHO; CARDOSO-LEITE, 2017; GRACIANO-SILVA; MELLO; CARDOSO-LEITE, 2018) utilizam componentes da vegetação para planejar e estimar indicadores de estado de conservação em áreas protegidas.…”

Section: Introductionunclassified

Adaptação e eficiência de um índice para análise da integridade biótica em Floresta Ombrófila Densa

2020

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Diante dos diversos métodos de mensuração da integridade biótica de determinada área de floresta evidencia-se a Avaliação Ecológica Rápida (AER). Com base na AER foi desenvolvido um índice para avaliar a condição da vegetação, denominado Índice de Integridade Biótica (IIB). A aferição e precisão deste índice retratam o quão íntegro um dado ecossistema florestal se encontra no momento da análise. O alicerce para a eficiência na aplicação do IIB está na escolha correta dos indicadores de integridade biótica, ou seja, nas variáveis a serem mensuradas. O presente estudo partiu de um índice anteriormente proposto para Floresta Estacional Semidecidual (FES), e teve como objetivo adaptar o IIB para uso em área de Floresta Ombrófila Densa no Estado de São Paulo, bem como testar sua eficiência no diagnóstico da integridade de fragmentos de Floresta Ombrófila Densa (FOD) inseridos em matriz rural. Dos onze indicadores presentes no método original, alguns foram mantidos como no original ou adaptados, alguns retirados e alguns novos foram criados. O IIB adaptado foi aplicado numa área de FOD de 70 hectares. Para isso, foram utilizadas 20 parcelas de 10x10m, dentro da área amostral. Os resultados mostraram uma variação do IIB entre 28 e 47, ou seja, 2 parcelas registraram integridade baixa, 11 integridade média e 7 integridade boa. A área como um todo apresentou integridade regular, o que era esperado devido ao seu tamanho, ao entorno agrícola e ao histórico de perturbações. O IIB mostrou-se adaptado e eficiente para análise da integridade biótica da FOD, pois conseguiu mostrar a diferença de integridade entre diferentes trechos de Floresta Ombrófila Densa. Os indicadores menos eficientes foram: “cobertura de serapilheira” e “espécies exóticas lenhosas”. Os mais eficientes foram: “Euterpe edulis”, “epífitas”, “clareiras” e “cipós/lianas”.

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Lianas, tree ferns and understory species: indicators of conservation status in the Brazilian Atlantic Rainforest remnants, southeastern Brazil

Cited by 10 publications

References 52 publications

Spatial distribution analysis of Dicksonia sellowiana Hook. in Araucaria forest fragments with different sizes

Spatial distribution analysis of Dicksonia sellowiana Hook. in Araucaria forest fragments with different sizes

Taxonomic, Phylogenetic, and Functional Diversity of Ferns at Three Differently Disturbed Sites in Longnan County, China

Adaptação e eficiência de um índice para análise da integridade biótica em Floresta Ombrófila Densa

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