Caracterização do processo sucessional no Projeto de Assentamento Benfica, sudeste do estado do Pará, Amazônia oriental

Coelho, Roberta de Fátima Rodrigues; Miranda, Izildinha Souza; Mitja, Danielle

doi:10.46357/bcnaturais.v7i3.590

Cited by 14 publications

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“…As secondary forests were estimated to be in an advanced stage of succession, they were expected to be similar to primary forests (Chazdon 2012;Coelho et al 2012); however, the response of biodiversity measures varied among vertical vegetation strata, and the ability of the diversity measures to differentiate among primary and secondary forest decreased from the upper to the lower stratum. Vertical stratification is almost never considered in studies of comparative biodiversity, but our results suggest that the inclusion of vegetation strata in the sampling design can highlight differential effects of the distribution of plant life forms and ecological groups in different niches of primary and secondary forests.…”

Section: Discussionmentioning

confidence: 99%

Differentiating diversity among different land cover types in the eastern Amazon

DIAS,

MIRANDA,

DO VALE

et al. 2023

Acta Amaz.

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Measurements of biodiversity can be used to assess the scale of anthropogenic impact and predict species loss. A great number of diversity measures exist involving species richness and relative abundance that differ in how they are calculated. The choice of the adequate biodiversity measure to compare biological communities poses a challenge. The aim of this study was to evaluate the ability of 26 diversity measures to differentiate land cover types in the eastern Brazilian Amazon. Diversity was inventoried and quantified in three vertical strata in six locally dominant land cover types: primary and secondary forests, agroforestry systems, oil palm plantations, annual croplands and pastures. No diversity measure was able to differentiate all land cover types in every stratum. Fisher’s alpha was able to differentiate cover types in the middle and upper strata, while Smith-Wilson and Jentsch’s mixture quotient were able to differentiate in the lower and upper strata, and heterogeneity indices only differentiated in the upper stratum. The distinction and ranking of plant diversity among land covers depended on the diversity measure chosen. The number and types of land cover and vertical strata were a key factor in the ability of the diversity measure to differentiate among them.

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Section: Discussionmentioning

confidence: 99%

Differentiating diversity among different land cover types in the eastern Amazon

DIAS,

MIRANDA,

DO VALE

et al. 2023

Acta Amaz.

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“…Certain studies have already reported the excellent development of babassu palm in secondary environments (e.g., Mitja & Ferraz 2001;Santos & Mitja 2011;Coelho et al 2012). The high density of this palm in these areas results from its resilience to natural and anthropogenic disturbances (fire and cutting for young acaule stages) (Mitja et al 2018).…”

Section: Resilience Of a Speciosamentioning

confidence: 98%

“…In Brazil, this species has a wide distribution range, occurring over an area of 200,000 km² (May et al 1985), across 13 states (Anderson et al 1991;Henderson 1995;Shiraishi-Neto 1999;Rufino et al 2008;Araújo & Lopes 2012). It has an optimal development in secondary environments May et al 1985;Barot et al 2005;Santos & Mitja 2011;Coelho et al 2012), where it can become dominant (Anderson 1983;Pinheiro 2004;Mitja et al 2018).…”

Section: Study Speciesmentioning

confidence: 99%

“…Mart. (inajá), can become invasive and establish in open areas (Kahn et al 2003;Santos & Mitja 2011;Coelho et al 2012), because deforestation promotes the growth of surviving palms, and fires do not usually kill acaule young individuals whose underground stipe is protected (Mitja & Ferraz 2001;Souza & Martins 2002;Kahn et al 2003). However, frequent habitat disturbances may threaten even disturbance-adapted species.…”

Section: Introductionmentioning

confidence: 99%

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What is the influence of anthropogenic impact on the population structure of Attalea speciosa Mart. ex Spreng. in the Brazilian Amazonian region?

et al. 2022

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Attalea speciosa (babassu) is a native palm of the primary forest from Amazonian and Cerrado biomes, and has multiple economic and cultural uses. However, this palm can become dominant in open areas, with a long-term persistence in the community. The objective of this study was to compare the population structure and morphology of babassu in three habitat types characterizing forest succession: primary forest, pasture, and babaçual (babassu-dominated secondary forest). For this purpose, we monitored 6,333 individuals for three years at six life stages in 11 sites with 25 plots located in PA-Benfica, Itupiranga-Pará, Brazil. The morphological parameters showed differences between secondary environments (pasture and babaçual) and primary forests, suggesting that this species has a high capacity for phenotypic plasticity. The inverse J-shaped distribution was observed only in primary forests, with the density of all stages constant along the whole study, unlike pastures and babaçual areas. While the density of seedlings is highest in primary forests, stage 4 and 5 juveniles and adults are most numerous in babaçuals. Our results suggest that the higher dominance of A. speciosa in babaçual areas can be associated with the resilience of this species to anthropogenic disturbances.

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“…Na comparação da taxa de mortalidade a capoeira apresentou taxa de 22,5% enquanto no SAF essa taxa foi de 11,8% uma diferença de 10,7% ou seja, a sobrevivência dos indivíduos do SAF é maior que o da capoeira. Essa taxa de mortalidade da capoeira pode ser explicada devido a morte de algumas espécies dentro do fragmento florestal, que segundo Coelho et al, (2012) essas mortes ocorrem naturalmente devido a competição por luz onde as que sobrevivem geralmente são mais tolerantes a sombra e se enquadram dentro do grupo ecológico das secundárias, o que significa que a capoeira apresenta uma maior dinâmica florestal no qual está havendo uma mudança do grupo ecológico das espécies, e no SAF essa competição pela sobrevivência não é tão intensa.…”

Section: Famíliaunclassified

Uso alternativo do solo como forma de recuperação de área degradada

Menezes

Schwartz

Fortaleza

et al. 2022

RSD

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O objetivo de estudo foi avaliar e comparar a dinâmica florística de dois fragmentos florestais constituídos por Sistemas Agroflorestais e capoeira como forma de recuperação de área degradada. O estudo foi conduzido em uma área de 125 ha localizada no município de Igarapé-Açu/PA. Para análise florística e estrutural dos dois fragmentos florestais realizou-se dois censos, o primeiro no ano de 2018 e o segundo no ano de 2020. Foram calculados variáveis fitossociológicas como densidade, dominância, frequência e posição sociológica, valores relativos e absolutos para a obtenção do índice de valor de importância ampliado das espécies (IVIA), índice de valor de cobertura das espécies (IVC), índice de diversidade de Shannon-Weaver (H’), índice de dominância de Simpson (C), índice de equitabilidade de Pielou (J’) e o índice de similaridade de Jaccard, incremento periódico médio anual (IPMA) e a taxa de mortalidade das espécies da capoeira e do SAF. Os dois fragmentos florestais apresentaram distribuição diamétrica em forma de “J invertido”, o índice de Shannon-Weaver (H’) variou de 3,08 em 2018 para 3,03 em 2020 na capoeira e de 2,91 em 2018 para 2,83 em 2020 no SAFs, evidenciando uma média diversidade. As espécies mais expressivas na capoeira foram Myrcia sylvatica, Myrciaria tenella, Myrcia bracteata, Tapirira guianensis e Attalea maripa, no SAFs foram Jacaranda copaia, Acacia mangium, Lacistema pubescens, Myrcia sylvatica e Vismia guianensis. A taxa de mortalidade da capoeira foi 10,7% maior em comparação com a do SAFs. Os dois tratamentos apresentam um alto índice de valor de cobertura, o que configura solo recoberto por biomassa, plantas principalmente do estrato médio e superior podendo-se correlacionar com raízes superficiais e profundas facilitando a infiltração da água e ciclagem de nutrientes diminuindo a erosão e recuperando a área degradada.

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Caracterização do processo sucessional no Projeto de Assentamento Benfica, sudeste do estado do Pará, Amazônia oriental

Cited by 14 publications

References 0 publications

Differentiating diversity among different land cover types in the eastern Amazon

Differentiating diversity among different land cover types in the eastern Amazon

What is the influence of anthropogenic impact on the population structure of Attalea speciosa Mart. ex Spreng. in the Brazilian Amazonian region?

Uso alternativo do solo como forma de recuperação de área degradada

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