Análise florística e estrutural de sistemas silviagrícolas em Tomé-Açu, Pará

Bolfe, É. L.; Batistella, M.

doi:10.1590/s0100-204x2011001000004

Cited by 34 publications

(20 citation statements)

References 10 publications

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“…The company has Roundtable on Sustainable Palm Oil (RSPO) certification, which implies that the production process respects various environmental requirements. The forest fragments were between 5000 and 17 000 ha, and were dominated by unflooded (terra firme) forests (Bolfe & Batistella 2011, Portes et al 2011. The fragments can be considered well-preserved since they are protected and monitored by the company and no logging and hunting is allowed.…”

Section: Study Areamentioning

confidence: 99%

The effects of oil palm plantations on the functional diversity of Amazonian birds

et al. 2016

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Abstract:Oil palm plantations are rapidly expanding in tropical areas, although the nature of the impacts on the functional roles of the different species in the ecosystem is poorly understood. The present study is the first assessment of how oil palm affects the functional diversity of birds in the Brazilian Amazon and tests the hypothesis that converting forest to oil palm decreases functional diversity of bird communities, selecting species more tolerant to environmental disturbances. We conducted point counts to survey bird communities in 16 plots in the eastern Amazon. We sampled 32 points in riparian forest, 128 in oil palm and 160 in forested habitats. To test whether the conversion of forest into oil palm plantations affects functional diversity of birds we calculated the FD (Functional Diversity) and FRic (Functional Richness) indices. To examine whether oil palm plantations select species functionally more similar than expected by chance we used a null model (SES.FD). FD was significantly higher in the forest plots in comparison with riparian forests and oil palm, and lower in oil palm when compared with riparian forests. FRic, in turn, was greater in forest plots than in oil palm and in riparian forest. These results show that the conversion of forested areas to oil palm represents a great loss of functional strategies. The SES values indicate that in forested habitats bird communities tend to be functionally clustered while in the oil palm they are functionally overdispersed. The functional traits most affected by oil palm were those associated with diet and foraging stratum. In short, oil palm plantations reduced functional diversity of birds, although the presence of riparian forests within the plantations and the fragments of forest adjacent are extremely important for the maintenance of ecosystem services.

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Section: Study Areamentioning

confidence: 99%

The effects of oil palm plantations on the functional diversity of Amazonian birds

et al. 2016

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“…In the state of Pará, agroforestry systems have gained relevance mainly in the municipality of Tomé-Açu since the late 1970s, when local producers were forced to seek alternatives to the decline of black pepper market caused by fusariosis. One of the alternatives found was the fruit growing activity, with the cultivation of species such as papaya, acerola, melon, orange, palm oil, açai, cacao, cupuaçu, passion fruit, among others, which caused the diversification of activities, associated with consortium in agroforestry systems, allowed local production to be inserted into new markets (ARCO-VERDE, 2008;BOLFE;BATISTELLA, 2011). Varela and Santana (2009) evaluated the viability of agroforestry systems in the municipality of Tomé-Açu and verified that there is preference of producers for AFS in relation to the traditional system, mainly because the agroforestry system presents less risk, since the diversification of cultures provides greater market reach to producers.…”

Section: Introductionmentioning

confidence: 99%

Spondias mombin and Theobroma grandiflorum in agroforestry system: productivity implications

et al. 2018

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In agroforestry systems, little is known about the influence of the dominant species on that located in the lower layer of the canopy. The aim of this study was to evaluate if S. mombin plants, when in consortium with T. grandiflorum, caused some type of depression in the performance of T. grandiflorum and also to identify the most favorable S. mombin clones for this interaction. The experiment started on February 2005. During 11 years, four levels of influence of S. mombin on T. grandiflorum caused by the proximity between species were evaluated. As response variables, the vegetative development of S. mombin and T. grandiflorum was measured; the production of eight vintages T. grandiflorum trees was computed, and the mortality rate of plants was recorded. The results showed that the competition exerted by S. mombin moderately affected the initial development of plants, as well as the production of fruits in the last harvests, and the survival rate. The most favorable S. mombin clones to be used in agroforestry systems with T. grandiflorum trees were identified. According to results presented here, it was possible to conclude that S. mombin can be indicated as a species to compose AFS with T. grandiflorum.

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“…A partir da análise da estrutura da vegetação, foram definidas quatro classes de sistemas agroflorestais (SAF 1, SAF 2, SAF 3 e SAF 4), de acordo com a altura total (H) e o diâmetro à altura do peito (DAP) dos indivíduos (Bolfe & Batistella, 2011). Esses sistemas apresentavam diferentes idades e composições florísticas, com biomassa e cobertura da terra crescente do SAF 1 para o SAF 4.…”

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Correlação de variáveis espectrais e estoque de carbono da biomassa aérea de sistemas agroflorestais

Bolfe¹,

Batistella²,

Ferreira

2012

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a correlação entre variáveis espectrais e o estoque de carbono da biomassa aérea de sistemas agroflorestais da região de Tomé-Açu, PA. Foram testados 24 índices de vegetação de três grupos (razão simples, diferença normalizada e complexos), gerados a partir de imagens do sensor TM/ Landsat-5, adquiridas em 2008. As variáveis obtidas foram correlacionadas, por meio de regressão linear simples, ao estoque de carbono de quatro classes de sistemas agroflorestais, de diferentes idades e composições florísticas. As correlações obtidas entre as variáveis espectrais e o estoque de carbono foram significativas em 47% dos índices testados e variaram de acordo com as diferenças de biomassa nos sistemas analisados. As melhores correlações foram obtidas pelos índices de vegetação de razão simples e de diferença normalizada, em sistemas agroflorestais jovens, e pelos índices de vegetação complexos, em sistemas agroflorestais mais antigos.Termos para indexação: integração lavoura-pecuária-floresta, Landsat, sensoriamento remoto, uso e cobertura da terra. Correlation of spectral variables and aboveground carbon stock of agroforestry systemsAbstract -The objective of this work was to evaluate the correlation between spectral variables and aboveground carbon stock of agroforestry systems in the region of Tomé-Açu, PA, Brazil. Twenty-four vegetation indices from three groups (simple ratio, normalized difference, and complex), calculated from images of the TM/ Landsat-5 sensor acquired in 2008, were tested. The obtained variables were correlated, by means of simple linear regression, to carbon stock from four agroforestry systems with different ages and floristic composition. The correlations obtained among spectral variables and carbon stock were significant in 47% of the tested indices and changed according to the differences in biomass of the analyzed systems. The best correlations were obtained by the simple ratio and normalized difference indices in young agroforestry systems, and by complex vegetation indices in older agroforestry systems.Index terms: crop-livestock-forest integration, Landsat, remote sensing, land use and land cover.

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Análise florística e estrutural de sistemas silviagrícolas em Tomé-Açu, Pará

Cited by 34 publications

References 10 publications

The effects of oil palm plantations on the functional diversity of Amazonian birds

The effects of oil palm plantations on the functional diversity of Amazonian birds

Spondias mombin and Theobroma grandiflorum in agroforestry system: productivity implications

Correlação de variáveis espectrais e estoque de carbono da biomassa aérea de sistemas agroflorestais

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