Caracterização dos fragmentos florestais amazônicos remanescentes na microbacia hidrográfica do rio Taxidermista I em Alta Floresta, MT

Bleich, Monica Elisa; Silva, Carlos José da

doi:10.5007/2175-7925.2013v26n4p45

Cited by 4 publications

(3 citation statements)

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“…Nesse contexto, a forma, o tamanho do fragmento, a extensão da zona de efeito de borda (BLUMENFELD et al, 2016), o tipo de vizinhança e a distância entre os fragmentos, ou grau de isolamento e conectividade (COSTA et al, 2015;BLEICH & SILVA, 2013), são importantes para a persistência das populações, podendo afetar a resiliência desses fragmentos. Para verificar os pontos mencionados acima, as análises por meio de métricas da paisagem são utilizadas para mensurar o impacto da fragmentação florestal em uma paisagem (DANTAS et al, 2017;PONCIANO et al, 2015).…”

Section: Introductionunclassified

Análise espacial dos fragmentos florestais no entorno de uma unidade de conservação de proteção integral

Rusca

Moraes

Valente

et al. 2017

Rev. Bras. Ciênc. Ambient. (Online)

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Section: Introductionunclassified

Análise espacial dos fragmentos florestais no entorno de uma unidade de conservação de proteção integral

Rusca

Moraes

Valente

et al. 2017

Rev. Bras. Ciênc. Ambient. (Online)

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“…Habitat quality affects biodiversity and can benefit from the connectivity between habitats [10,46], especially in fragmented landscapes [47]. As well as providing corridors connecting forest fragments [48], the rehabilitation of riparian forests of the numerous streams in southern Amazonia can help minimize the negative effects of this region's deforestation, such as a significant decline in local and regional biodiversity [11]. In Mato Grosso, DiasSilva et al [63] found that alteration in riparian areas can lead to significant changes in Heteroptera composition, and Juen et al [49] found that even partial environmental changes affect the composition of Odonata in streams, indicating that ecosystem services may be lost.…”

Section: Discussionmentioning

confidence: 99%

Riparian Deforestation Affects the Structural Dynamics of Headwater Streams in Southern Brazilian Amazonia

Bleich

André

Piedade

2014

Tropical Conservation Science

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Comparative studies of streams with altered versus conserved riparian zones are important to evaluate the degree of alterations caused by inappropriate use of these streams' vital buffer zones. The aim of this study was to determine the impact of riparian deforestation on the habitat structure of southern Brazilian Amazonian headwater streams, as well as to provide elements for impact assessment and the monitoring of these water bodies. We selected ten sites and two headwater streams at each site; one stream was located in an area with preserved riparian vegetation (pristine streams) and the other stream in a deforested riparian zone (altered streams). Stretches of these streams were analyzed across hydrological periods (dry period, beginning of the rainy period, and end of the rainy period) for hydromorphological aspects, water physical-chemical variables, and habitat integrity (proportion of forestation in buffer zones and habitat integrity index). Compared to pristine streams in all the hydrological periods analyzed, altered streams presented lower oxygen concentration (~1.0 mg/L), an increase of 1 o C in water temperature, and less organic material availability. We found that riparian deforestation affects habitat structure variability among hydrological periods, making them more homogeneous. Therefore, beyond the necessary broadening of the spatial scale of studies in this region, monitoring these understudied headwater stream environments is also crucial for determining the magnitude of deforestation effects on these vulnerable aquatic ecosystems.Key-words: riparian zone; environmental impact; lotic ecosystems; temporal variation; water physical-chemical conditions ResumoEstudos comparativos entre riachos com zona ripária alterada e conservada são importantes para avaliar o grau de alteração provocado pelo uso indevido desta zona tampão vital aos corpos de água. Logo, o objetivo deste estudo foi determinar o impacto do desmatamento da florestal ripária sobre a estrutura do habitat de riachos de cabeceira no sul da Amazônia, e fornecer elementos para avaliação de impacto e monitoramento desses corpos de água. Nós selecionamos 10 locais e em cada local 2 riachos, sendo um riacho localizado em área com floresta ripária preservada (riachos pristinos) e outro riacho com a floresta ripária desmatada (riachos alterados). Trechos destes riachos foram analisados durante 3 períodos hidrológicos (período de seca, enchente e vazante) para a caracterização de aspectos hidromorfologicos, variáveis físico-químicas e de controle para a integridade do habitat (proporção de floresta em área ripária e índice de integridade do habitat). Em relação aos riachos íntegros, em todos os períodos hidrológicos avaliados, os riachos alterados apresentaram menor concentração de oxigênio (~ 1,0 mg/L), aumento de 1 o C na temperatura da água e menor disponibilidade de material orgânico alóctone. Nós detectamos que o desmatamento da floresta ripária afeta a variabilidade na estrutura do habitat entre os períodos hidrológicos, torn...

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“…The experiment was carried out in an area of degraded riparian forest situated in the metropolitan area of the city of Alta Floresta, in the state of Mato Grosso (MT) (Bleich & Silva, 2013), at the geographic coordinates of 09°49'58" S and 56°03'22" W, at284 m (Figure 1). The experimental area is approximately 3,000 m 2 , located on the shores of a perennial watercourse with an average of 2 m in width.…”

Section: Study Areamentioning

confidence: 99%

Planting of Seedlings and Direct Seeding with Different Inputs in Pioneer Species in the Southeastern Amazon

et al. 2020

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The main objectives of the study were to determine which was the best implantation of forest method between direct seeding and planting of seedlings, the use of Slow Release Fertilizer (SRF) and hydrogel in the pioneer species Schizolobium parahyba var. amazonicum and Senegalia polyphylla, and the use of morphometric indices, such as slenderness of trunk and canopy, to assist in growth evaluation. Generalized Linear Model (GLM) and Principal Component Analysis (PCA) were used as the main methods. The morphometric indices, plus the variables height, trunk and canopy diameter, provided complementary information on the morphological growth pattern of the plant. For both species, both direct seeding and planting of seedlings promoted good results in the growth variables, with the planting of seedlings showing better results in Senegalia, however, not enough statistical clarity for Schizolobium. Regarding inputs, the SRF promoted the best results and therefore this fertilizer was recommended for a complementary input in forest implantation.

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Caracterização dos fragmentos florestais amazônicos remanescentes na microbacia hidrográfica do rio Taxidermista I em Alta Floresta, MT

Cited by 4 publications

References 15 publications

Análise espacial dos fragmentos florestais no entorno de uma unidade de conservação de proteção integral

Análise espacial dos fragmentos florestais no entorno de uma unidade de conservação de proteção integral

Riparian Deforestation Affects the Structural Dynamics of Headwater Streams in Southern Brazilian Amazonia

Planting of Seedlings and Direct Seeding with Different Inputs in Pioneer Species in the Southeastern Amazon

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