Desertification trends in the Northeast of Brazil over the period 2000–2016

Tomasella, Javier; Vieira, Rita Marcia da Silva Pinto; Barbosa, Alexandre; Rodríguez, Daniel Andrés; Santana, Marcos de Oliveira; Sestini, Marcelo Francisco

doi:10.1016/j.jag.2018.06.012

Cited by 138 publications

(115 citation statements)

References 30 publications

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“…In the case of the other regions of Brazil, such as the semiarid northeast (dominated by caatinga vegetation), scientific interest is generally focused on the impacts of severe drought in the local population. However, recent studies have shown that fire intensification is linked to soil degradation and desertification not only in the semiarid northeast [90] but also in the Brazilian cerrado [91]. It is clear that fire intensification is becoming a crucial piece of information to understand the resilience of Brazilian ecosystems.…”

Section: Case Study 3: Drought Impacts On Forest Firementioning

confidence: 99%

“…In addition, in the case of the Amazon basin, drought intensification plays a fundamental role in terms of carbon emissions [89]. Although drought events lead to an increase in fires, it is well known that the impacts of droughts have also increased in recent years due to the expansion of anthropogenic land-use changes, which are generally associated with the traditional use of fires for land management [90].…”

Section: Case Study 3: Drought Impacts On Forest Firementioning

confidence: 99%

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Extreme Drought Events over Brazil from 2011 to 2019

et al. 2019

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Drought-related disasters are among the natural disasters that are able to cause large economic and social losses. In recent years, droughts have affected different regions of Brazil, impacting water, food, and energy security. In this study, we used the Integrated Drought Index (IDI), which combines a meteorological-based drought index and remote sensing-based index, to assess the drought events from 2011 to 2019 over Brazil. During this period, drought events were observed throughout the country, being most severe and widespread between the years 2011 and 2017. In most of the country, the 2014/15 hydrological year stands out due to the higher occurrence of severe and moderate droughts. However, drought intensity and observed impacts were different for each region, which is shown by the different case studies, assessing different types of impacts caused by drought in Brazil. Thus, it is fundamental to evaluate the impacts of droughts in a continental country such as Brazil, where a variety of vegetation, soil, land use, and especially different climate regimes predominate.

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Section: Case Study 3: Drought Impacts On Forest Firementioning

confidence: 99%

Section: Case Study 3: Drought Impacts On Forest Firementioning

confidence: 99%

Extreme Drought Events over Brazil from 2011 to 2019

et al. 2019

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“…There's the world's largest tropical rainforest in Brazil, the Amazon rainforest, which rainforest is characterized by abundant vegetation, high plant height and high density, so the NDVI value is always higher than other areas. NDVI was showing a trend of increasing slowly from 1982 to 2015, but there was a sharp decline in the vicinity of 2000, which was directly related to deforestation and land reclamation [49][50][51].…”

Section: The Impact Of Land-use Managementmentioning

confidence: 99%

Factors Affecting Long-Term Trends in Global NDVI

Yang

Wang

Bai

et al. 2019

Forests

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Diagnosing the evolution trends of vegetation and its drivers is necessary for ecological conservation and restoration. However, it remains unclear what the underlying distribution pattern of these trends and its correlation with some drivers at large spatial-temporal scales. Here we use the normalized difference vegetation index (NDVI) to quantify the activity of vegetation by Theil–Sen median trend analysis and the Mann–Kendall test, Pearson correlation analysis and Boosted regression trees (BRT) model. Results show that about 34% of the global continent area has experienced greening in the grid annual NDVI from 1982 to 2015. The major greening areas were observed in the Sahel, European, India and south China. Only 10% of the global continent land areas were browning, and these were observed in Canada, South America, central Africa and Central Asia. BRT model shows that rainfall is the most important factor affecting vegetation evolution (63.1%), followed by temperature (15%), land cover change (8.6%), population (6.5%), elevation (6.4%) and nightlight (0.4%). It’s about 21% of the world’s continent were affected by rainfall, mainly in arid regions such as central Asia and Australia. The main temperature-affected areas accounted for 36%, located near the equator or in high latitudes.

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“…The caatinga is the dominant vegetation within the BSA, being quite rustic and heterogeneous as to its floristic composition, varying widely according to the meteorological conditions (mainly rainfall) and edaphic for each locality within the BSA, allowing greater or lesser supply of resources to local populations (Tomasella et al, 2018). In addition to this characteristic imposed by the environmental factors, the anthropic actions have contributed to the degradation and advancement in the desertification process of the Caatinga, due to the disorganized exploitation of the resources, reflecting in the socioeconomic follow-up of the region (Mariano et al, 2018).…”

Section: Literature Review Characterization Of the Environmentmentioning

confidence: 99%

The application of agrometeorological techniques contributes to the agricultural resilience of forage cactus: A review

Alves¹,

Jardim²,

Souza³

et al. 2018

Amaz. Jour. of Plant Resear.

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The Brazilian semi-arid is an area that has a strong influence on climatic factors and agricultural vulnerability, which govern the availability and supply of fodder. The understanding of the limitations and the alternatives to be adopted, aid in the improvement of the systems of production of fodder and an increase in the benefits of the system. In this review, we sought to address agrometeorological aspects and agronomic techniques aimed at improving resilience in forage cactus production systems under different cropping systems in arid and semi-arid environments through information on the stability of the plant population contributing to reducing the risk environmental degradation and production losses.

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Desertification trends in the Northeast of Brazil over the period 2000–2016

Cited by 138 publications

References 30 publications

Extreme Drought Events over Brazil from 2011 to 2019

Extreme Drought Events over Brazil from 2011 to 2019

Factors Affecting Long-Term Trends in Global NDVI

The application of agrometeorological techniques contributes to the agricultural resilience of forage cactus: A review

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