Roads in the Southwestern Amazon, State of Acre, between 2007 and 2019

Nascimento, Eric de Souza; Silva, Sonaira Souza da; Bordignon, Leandra; Melo, A. W. F. de; Brandão, Amintas; Souza, Carlos M.; Silva, Celso

doi:10.3390/land10020106

Cited by 19 publications

(13 citation statements)

References 38 publications

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“…Similar results have been documented by other authors (Devisscher et al, 2016;Kim et al, 2019). Based on the visual assessment of the active fire occurrence, we found additional evidence that our models were able to simulate the spatial patterns distribution of fire-prone areas in most of the years, which were concentrated near human settlements and along the major roads (Baraloto et al, 2015;Nascimento et al, 2021).…”

Section: Discussion Fire Drivers and Impactssupporting

confidence: 90%

Assessment of fire hazard in Southwestern Amazon

Ferreira

Campanharo

Barbosa

et al. 2023

Front. For. Glob. Change

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Fires are among the main drivers of forest degradation in Amazonia, causing multiple socioeconomic and environmental damages. Although human-ignited sources account for most of the fire events in Amazonia, extended droughts may magnify their occurrence and propagation. The southwestern Amazonia, a transnational region shared by Brazil, Peru, and Bolivia and known as the MAP region, has been articulating coordinated actions to prevent disasters, including fire, to reduce their negative impacts. Therefore, to understand the fire patterns in the MAP region, we investigated their main drivers and the changes in the suitability of fire occurrence for the years 2005, 2010, 2016, and 2020. We used a maximum entropy (MaxEnt) model approach based on active fire data from satellites, climatic data, and land use and land cover mapping to spatially quantify the suitability of fire occurrence and its drivers. We used the year 2015 to calibrate the models. For climatic data and active fire count, we only considered grid cells with active fire count over the third quartile. All our models had a satisfactory performance, with values of the area under the curve (AUC) above 0.75 and p < 0.05. Additionally, all models showed sensitivity rates higher than 0.8 and false positive rates below 0.25. We estimated that, on average, 38.5% of the study region had suitable conditions for fire occurrence during the study period. Most of the fire-prone areas belong to Acre, representing approximately 74% of the entire MAP region. The percentage of deforested areas, productive lands, forest edges, and high temperatures were the main drivers of fire occurrence in southwestern Amazonia, indicating the high vulnerability of fragmented landscapes extreme climatic conditions to fire occurrence. We observed that the modeling approach based on Maxint is useful for useful for evaluating the implications of climatic and anthropogenic variables on fire distribution. Furthermore, because the model can be easily employed to predict suitable and non-suitable locations for fire occurrence, it can to prevent potential impacts associated with large-scale wildfire in the future at regional levels.

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Section: Discussion Fire Drivers and Impactssupporting

confidence: 90%

Assessment of fire hazard in Southwestern Amazon

Ferreira

Campanharo

Barbosa

et al. 2023

Front. For. Glob. Change

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“…The execution of this infrastructure project poses a great challenge to the central objective of the SDNP. Multiple studies have shown increased anthropogenic pressures after opening roads in or near CUs (Yanai et al 2012, Vilela et al 2020, Nascimento et al 2021. Walker et al (2019) and Lovejoy and Nobre (2018) have shown that deforestation associated with such infrastructure could push the Amazon rainforest beyond a 'tipping point', causing its collapse in the southern and south-western regions.…”

Section: Threats To the Serra Do Divisor National Parkmentioning

confidence: 99%

Serra do Divisor National Park: a protected area under threat in the south-western Brazilian Amazon

et al. 2022

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Summary Protected areas have numerous roles (such as biodiversity preservation, the development of scientific research and the sustainable use of natural resources), but they are under threat from political and economic forces. The 837 000-ha Serra do Divisor National Park (SDNP) in the south-western Brazilian Amazon combines the conservation of natural resources and the maintenance of the productive activities of c. 400 resident families. The Brazilian and Peruvian governments have proposed a road linking Acre (Brazil) to Ucayali (Peru) that would bisect the SDNP. Another threat to the SDNP is a bill proposing its downgrading to an ‘environmental protection area’. This study aims to map the land cover of the SDNP and its surroundings from 1988 to 2018 and to analyse the dynamics of land-use change. Analysis of Landsat satellite images with supervised classification using the MaxVer algorithm show that, during the 30-year period, pasture showed the highest absolute land-cover gain, with 1986 ha in the interior and 7661 ha along the periphery of the SDNP. Only 1% of the park’s primary forest was lost by 2018, but the proposed road and potential downgrading may result in accelerated deforestation and forest degradation in the near future.

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“…As unidades de conservação (UCs) em todo o mundo exercem função fundamental na preservação e conservação ambiental e da biodiversidade, além de auxiliar na estabilidade climática, fornecimento de serviços ecossistêmicos e garantia de modo de vida das populações tradicionais nesses territórios (JENKINS; JOPPA, 2009;RICHARDS et al, 2016). Entretanto, fatores têm tornado a proteção das UCs fragilizada, que vão desde questões de políticas públicas, invasão de terras, desmatamento, queimadas, construção de estradas, entre outros (BARBER et al, 2014;KELES et al, 2020;NASCIMENTO et al, 2021;VALE et al, 2021). (BARBER et al, 2014;PESSÔA et al, 2017;PFAFF et al, 2014).…”

Section: Introductionunclassified

Áreas naturais protegidas brasileiras: gestão, desafios, conceitos e reflexões

Gimenes¹,

Franco²,

Brunet³

et al. 2021

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Todos os direitos garantidos. Este é um livro publicado em acesso aberto, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado. Este trabalho está licenciado com uma Licença Creative Commons Internacional (CC BY-NC 4.0). Alexsande de Oliveira Franco; Victor Régio da Silva Bento (Organizadores).

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Roads in the Southwestern Amazon, State of Acre, between 2007 and 2019

Cited by 19 publications

References 38 publications

Assessment of fire hazard in Southwestern Amazon

Assessment of fire hazard in Southwestern Amazon

Serra do Divisor National Park: a protected area under threat in the south-western Brazilian Amazon

Áreas naturais protegidas brasileiras: gestão, desafios, conceitos e reflexões

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