PANORAMA DA DESERTIFICAÇÃO NO NORDESTE DO BRASIL: características e suscetibilidades

Santos, Francílio de Amorim dos; Aquino, Cláudia Maria Sabóia de

doi:10.18764/2446-6549.v2n7p144-161

Cited by 6 publications

(7 citation statements)

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“…The temporal analysis indicates growth in areas with higher risks (high and severe). As pointed out by Santos et al (2014), Vieira et al (2015), Aquino (2017), andTomasella et al (2018), public policies aimed at desertification have little relevance on a regional basis and only happen in small nuclei and experimental areas.…”

Section: Discussionmentioning

confidence: 99%

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Temporal analysis of desertification vulnerability in Northeast Brazil using Google Earth Engine

Moura

Walter

Lins

et al. 2022

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Intensive agricultural production has negative environmental impacts, increasing predisposition to desertification in areas with inadequate soil management. To evaluate the effects of agriculture, we aimed to perform a temporal analysis and analyze the development of desertification in Northeast Brazil. Initially, the region was separated into four climatic zones, grouping the locations with similar characteristics of air temperature and rainfall. In the analyses, images of the northeast region acquired from the Landsat 5 (1989, 1999, and 2009) and Landsat 8 (2019) satellites were processed using the Google Earth Engine platform. The periods were separated into dry and rainy periods, according to the climatic zones. The evaluation of vegetation index, characterization of the remaining vegetation cover, landscape pattern, and meteorological conditions were performed, respectively, through the Normalized Difference Vegetation Index, Modified Soil‐Adjusted Vegetation Index, and albedo of the terrestrial surface. The desertification index showed an increase in susceptible areas when comparing the interval from 1989 to 2019. In general, our results showed that there is less predisposition for desertification to occur during the rainy season. Also, when the results of our study were compared to official data released by the National Program of Action to Combat Desertification and Mitigate the Effects of Drought, there was disagreement regarding the classification of areas.

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Section: Discussionmentioning

confidence: 99%

“…(2014), Vieira et al. (2015), Santos and Aquino (2017), and Tomasella et al. (2018), public policies aimed at desertification have little relevance on a regional basis and only happen in small nuclei and experimental areas.…”

Section: Discussionmentioning

confidence: 99%

Temporal analysis of desertification vulnerability in Northeast Brazil using Google Earth Engine

Moura

Walter

Lins

et al. 2022

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“…1). The climate of the Leste Maranhense mesoregion is of the type "Aw", Tropical with dry winter season (Köppen 1948), with average annual temperatures above 22°C and rainfall ranging from 1,200 mm to 2,500 mm (Aquino & Santos 2016).…”

Section: Study Areamentioning

confidence: 99%

Orchids of the central region of eastern Maranhão, Brazil

et al. 2021

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The eastern portion of the state of Maranhão is a transitional area between Amazon Rainforest, Cerrado and Caatinga. Knowledge about the flora of this region is very poor, especially regarding Orchidaceae. The aim of this study was to provide a survey of the species of this family in the central area of this region. Fieldwork was performed monthly between December 2015 and April 2019 in the municipalities of Aldeias Altas, Caxias, Codó and São João do Sóter. An identification key, morphological descriptions and illustrations of the species are presented. Orchidaceae is represented in the area by seven genera and 17 species. The richest genera were Catasetum (five species), and Habenaria (four species). Habenaria schenckii is a new record for the state. The majority of the species are epiphytes (eight species, 47%) or terrestrial (seven species, 41%). The municipality of Caxias was the richest, with 13 species (76%), of which six were collected in the conservation units (CU’s) existing in the municipality (Área de Proteção Ambiental Municipal (APAM) Buriti do Meio Municipal and APAM Inhamum). Our data highlight the importance of the CU’s for the conservation of Orchidaceae, and the potential of ecotonal regions for discovering new records for the region.

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“…A Depressão Sertaneja Setentrional possui 206.700 km 2 e caracteriza-se pelo clima quente e semiárido, com chuvas irregulares e uma média anual de precipitação de 500 a 800 mm; fitofisionomia de Caatinga arbustiva a arbórea, ainda com remanescentes ciliares, como os carnaubais do Ceará; relevo de planície baixa, suavemente ondulado e com elevações residuais; solos rasos, pedregosos e de origem cristalina, com fertilidade média a alta, sofrendo facilmente com processos erosivos; áreas de depressão com 20 a 500 m, enquanto as elevações ocorrem de 500 a 800 m (VELLOSO et al, 2002;RAO et al , 2015;SANTOS;AQUINO, 2016 (ERVIN, 2003).…”

Section: Metodologiaunclassified

Análise De Componente Principal Do Rappam Em Unidades De Conservação De Caatinga Na Depressão Sertaneja Setentrional, Brasil / Principal Component Analysis of Rappam in Caatinga Protected Areas in the Setentrional Sertaneja Depression, Brazil

Araripe

Camacho

Costa

et al. 2020

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RESUMOAs Unidades de Conservação (UCs) são ferramentas importantes para a manutenção da biodiversidade em nível mundial. Para isso, é necessário que elas compreendam territórios representativos dos biomas do país, bem como tenham uma boa qualidade de gestão. A Caatinga é exclusivamente brasileira e marcada pelo seu pouco conhecimento e valorização, além de apresentar pequena representatividade em áreas protegidas. Assim, este trabalho objetivou identificar os indicadores do método RAPPAM (Rapid Assessment and Prioritization of Protected Area Management) mais relacionados com a efetividade de gestão das UC federais da Depressão Sertaneja Setentrional. Para esta análise o método RAPPAM foi aplicado em 2019/2020 para comparação com os dados dos ciclos 2005/2006 e 2010. As UCs analisadas foram: ESEC de Aiuaba, ESEC do Seridó, FLONA de Sobral e FLONA de Açu. Para análise e compreensão dos indicadores que mais explicaram o Índice Geral (IG) de efetividade de cada ano, foi realizada uma análise de PCA (Principal Component Analysis). Pode-se observar que os indicadores de maior peso para explicar o índice de efetividade das UC foram: Comunicação e Informação (CI); Planejamento da Gestão (PG); Recursos Financeiros (RF); Processo de Tomada de Decisão (PTD); Pesquisa, Avaliação e Monitoramento (PAM); Desenho e Planejamento da Área (DP); e Resultados (RS).Esse resultado é importante para direcionar as ações dos gerentes destas UC de forma a melhor contribuir para a eficácia dessas UC na conservação da Caatinga.

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PANORAMA DA DESERTIFICAÇÃO NO NORDESTE DO BRASIL: características e suscetibilidades

Cited by 6 publications

References 1 publication

Temporal analysis of desertification vulnerability in Northeast Brazil using Google Earth Engine

Temporal analysis of desertification vulnerability in Northeast Brazil using Google Earth Engine

Orchids of the central region of eastern Maranhão, Brazil

Análise De Componente Principal Do Rappam Em Unidades De Conservação De Caatinga Na Depressão Sertaneja Setentrional, Brasil / Principal Component Analysis of Rappam in Caatinga Protected Areas in the Setentrional Sertaneja Depression, Brazil

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