LBA-ECO LC-14 Modeled Deforestation Scenarios, Amazon Basin: 2002-2050

Soares‐Filho, Britaldo; Nepstad, Daniel C.; Curran, Lisa M.; Voll, Eliane; Garcia, Ricardo Alexandrino; Ramos, Carlos Augusto; McDonald, Adrian; Lefebvre, Paul; Schlesinger, P.

doi:10.3334/ornldaac/1153

2013

DOI: 10.3334/ornldaac/1153

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LBA-ECO LC-14 Modeled Deforestation Scenarios, Amazon Basin: 2002-2050

Britaldo Soares‐Filho¹,

Daniel C. Nepstad²,

Lisa M. Curran³

et al.

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Modeling the effects of land cover change on sediment concentrations in a gold-mined Amazonian basin

et al. 2019

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Land use/land cover change (LUCC) combined with gold mining activity (GMA) have reportedly affected the water quality of Amazonian rivers by intensifying surface soil erosion and increasing rivers' sediment concentration (SC). However, the role of LUCC on river siltation in comparison to that caused by GMA has not been assessed, and predictions of SC in the rivers accounting for future LUCC are scarce. This study applied a sediment modeling approach on Crepori Basin, located at eastern Amazon Basin, to simulate the impacts of past and future LUCC on SC in the river, comparing their impacts to those caused by GMA. Between 1973 and 2012, the expansion of deforested areas in the region had increased sheet erosion-driven SC in the river, especially during the highwater season, by up to 73.3%. LUCC projections for 2050 suggest future increases in sheet erosion-driven SC during the high-water season by more than three times of that caused by the land cover scenario of 1998-2012. Comparison between SC driven by sheet erosion to that caused by GMA has also shown that during the high-water and the low-water seasons, respectively, only about 14% and 6% of the total SC in the Crepori River resulted from laminar soil erosion, with the remaining proportion resulting from GMA.

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Modeling the effects of land cover change on sediment concentrations in a gold-mined Amazonian basin

et al. 2019

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Forestry control in the Brazilian Amazon I: wood and charcoal anatomy of three endangered species

Perdigão

Júnior

Gonçalves

et al. 2020

IAWA J.

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The Brazilian Amazon is vastly deforested by unsustainable practices. Several species of trees are threatened by extinction and their exact number is hard to quantify. Federal laws prohibit the harvest of endangered forest species. It is a vast challenge to control the illegal trade of wood and especially charcoal in Brazil. The goal of this work is to contribute to an identification database. It presents the anatomy of wood and charcoal of Bertholletia excelsa, Hevea brasiliensis and Swietenia macrophylla. Structural modifications due to carbonization were also studied. One Eucalyptus sp. hybrid was analysed as a comparison with native species. Anatomical features were well preserved in charcoals. Quantitative modifications, such as mass loss, increase of vessel and ray density, and reduction of vessel diameter and ray height, were seen in all species. The native species were easily distinguished from eucalypt in both wood and charcoal, and this study will allow easily sorting these species in cases of illegal trading. Since Amazon conservancy is highly dependent on the knowledge of native species, our results contribute to avoid illegal charcoal trade.

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Evaluating Water Use for Agricultural Intensification in Southern Amazonia Using the Water Footprint Sustainability Assessment

Lathuillière

Coe

Castanho

et al. 2018

Water

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We performed a Water Footprint Sustainability Assessment (WFSA) in the Xingu Basin of Mato Grosso (XBMT), Brazil, with the objectives of (1) tracking blue (as surface water) and green water (as soil moisture regenerated by precipitation) consumption in recent years (2000, 2014); and (2) evaluating agricultural intensification options for future years (2030, 2050) considering the effects of deforestation and climate change on water availability in the basin. The agricultural sector was the largest consumer of water in the basin despite there being almost no irrigation of cropland or pastures. In addition to water use by crops and pasture grass, water consumption attributed to cattle production included evaporation from roughly 9463 ha of small farm reservoirs used to provide drinking water for cattle in 2014. The WFSA showed that while blue and green water consumptive uses were within sustainable limits in 2014, deforestation, cattle confinement, and the use of irrigation to increase cropping frequency could drive water use to unsustainable levels in the future. While land management policies and practices should strive for protection of the remaining natural vegetation, increased agricultural production will require reservoir and irrigation water management to reduce the potential threat of blue water scarcity in the dry season. In addition to providing general guidance for future water allocation decisions in the basin, our study offers an interpretation of blue and green water scarcities with changes in land use and climate in a rapidly evolving agricultural frontier.

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LBA-ECO LC-14 Modeled Deforestation Scenarios, Amazon Basin: 2002-2050

Cited by 5 publications

References 0 publications

Modeling the effects of land cover change on sediment concentrations in a gold-mined Amazonian basin

Modeling the effects of land cover change on sediment concentrations in a gold-mined Amazonian basin

Forestry control in the Brazilian Amazon I: wood and charcoal anatomy of three endangered species

Evaluating Water Use for Agricultural Intensification in Southern Amazonia Using the Water Footprint Sustainability Assessment

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