Groundwater Mapping Using a Multi‐Frequency Electromagnetic‐Magnetic Helicopter System in Semi‐Arid Northeast Brazil

2003 ◽  
Author(s):  
Régis Dumont ◽  
Yvon Maurice
Keyword(s):  
Northeast Brazil ◽  
Groundwater Mapping ◽  
Semi Arid

Seismic stratigraphy of a partially filled incised valley on a semi-arid continental shelf, Northeast Brazil

2021 ◽  
Vol 41 (2) ◽  
Author(s):  
Antonio Rodrigues Ximenes Neto ◽  
Paulo Roberto Silva Pessoa ◽  
Lidriana de Souza Pinheiro ◽  
Jáder Onofre de Morais
Keyword(s):  
Continental Shelf ◽  
Seismic Stratigraphy ◽  
Northeast Brazil ◽  
Incised Valley ◽  
Semi Arid

Macroalgae Mariculture as a Social and Environmental Alternative for Coastal Traditional Communities of the Semi-Arid Region of Northeast Brazil

2020 ◽  
pp. 91-98
Author(s):  
Ivanilson de Souza Maia ◽  
Dárlio Inácio Alves Teixeira ◽  
Vigínia Maria Cavalari Henriques ◽  
Maulori Curié Cabral
Keyword(s):  
Arid Region ◽  
Northeast Brazil ◽  
Semi Arid Region ◽  
Semi Arid ◽  
Traditional Communities

“Macaíba , ” an emerging oil crop: Nutritional evaluation of the pulp and kernel fruits from semi‐arid and coastal zone of northeast Brazil

2020 ◽  
Author(s):  
Raquel Barbosa da Silva ◽  
Edvaldo Vieira Silva‐Júnior ◽  
Larissa Maria Barreto de Medeiros Trigueiros ◽  
Rayza Helen Graciano dos Santos ◽  
Jailane de Souza Aquino ◽  
...  
Keyword(s):  
Coastal Zone ◽  
Northeast Brazil ◽  
Nutritional Evaluation ◽  
Oil Crop ◽  
Semi Arid

Major Constituents of the Foliar Epicuticular Waxes of Species from the Caatinga and Cerrado

2000 ◽  
Vol 55 (9-10) ◽  
pp. 688-692 ◽  
Author(s):  
Antonio F. M. Oliveira ◽  
Antonio Salatino
Keyword(s):  
Ursolic Acid ◽  
Native Plants ◽  
Northeast Brazil ◽  
Arid Ecosystem ◽  
Epicuticular Waxes ◽  
Evergreen Species ◽  
Semi Arid

Abstract The epicuticular waxes of leaves of four species (Aspidospermci pyrifolium, Capparis yco, Maytenus rigida and Ziziphus joazeiro) from the Caatinga, (a semi-arid ecosystem of Northeast Brazil) and four species (Aristolochia esperanzae, Didymopanax vinosum, Strychnos pseudoquina and Tocoyena formosa) from the Cerrado, (a savanna ecosystem covering one third of the Brazilian territory), were analyzed. Six species contained a high content (above 60 μg.cm-2) of wax, four of them from the Caatinga. Triterpenoids and n-alkanes were the most frequent and abundant constituents found in the species from both habitats. The distribution of n-alkanes predominated by homologues with 27, 29, 31 and 33 carbon atoms, displayed no consistent differences between species from the two habitats. Lupeol, β-amyrin, epifriedelinol and ursolic acid were the triterpenoids found. Triterpenoids clearly predominate over alkanes in the waxes from the Cerrado species. The waxes of two evergreen species from the Caatinga yielded n-alkanes as predominant constituents. A comparison of foliar epicuticular waxes of native plants from ecosystems with different hydric constraints is discussed.

scholarly journals A probabilistic model for predicting seasonal rainfall in semi-arid lands of northeast Brazil

2014 ◽  
Vol 364 ◽  
pp. 182-187
Author(s):  
B. B. da Silva ◽  
C. C. Braga ◽  
S. G. L. Montenegro ◽  
V. d. P. R. da Silva ◽  
L. M. M. de Oliveira ◽  
...  
Keyword(s):  
Probabilistic Model ◽  
Rainy Season ◽  
Arid Lands ◽  
Seasonal Rainfall ◽  
Northeast Brazil ◽  
Average Rainfall ◽  
Homogeneous Area ◽  
Semi Arid Region ◽  
Second Period ◽  
Semi Arid

Abstract. In most of the northeast region of Brazil rainfall is relatively low, presenting significant inter-annual fluctuations, especially when compared to rainfall in other areas of Brazil. Moreover, evaporative rates (like the ones found in the northeast semi-arid region) are too high, sometimes reaching over 2800 mm annually. Owing to such a climate character, very large areas in northeast Brazil are subjected to recurrent droughts. This paper presents a methodology for the prediction of seasonal rainfall in semi-arid lands of northeast Brazil. A total of 72 raingauge stations of Paraiba State, and 84 in Ceará State were employed, all of them distributed in three and seven homogeneous areas, respectively. A rainy season with different subdivisions was established for each homogeneous area. The zi proportions – the ratio between the cumulative rainfall of the first rainy season period and the rain that falls during the whole rainy season were made to fit the Beta probabilistic model used for calculating the second and eighth deciles and the probability of rainfall above the average rainfall for the second period of the rainy season. The performance of the prognostic model for individual stations of Paraíba State in the period 1996–2000 was evaluated. In the period 1996 to 2000, with rainfall above average, the error was less than 20 %. The methodology adopted proved very accurate for forecasting droughts in northeast Brazil.

scholarly journals Helminths infecting the cat-eyed snake Leptodeira annulata Linnaeus 1758 (Squamata: Dipsadidae) in a semiarid region of Brazil

2018 ◽  
Vol 55 (4) ◽  
pp. 281-285
Author(s):  
E. F. Fernandes De Carvalho ◽  
A. Ferreira Da Silva-Neta ◽  
C. De Sousa Silva ◽  
C. R. De Oliveira ◽  
J. Da Cunha Xavier Nunes ◽  
...  
Keyword(s):  
Arid Region ◽  
Paratenic Host ◽  
Nematode Species ◽  
Helminth Fauna ◽  
Semiarid Region ◽  
Northeast Brazil ◽  
Semi Arid Region ◽  
Semi Arid

Abstract Snakes have diverse feeding and living habits, being exposed to a variety of endoparasite communities. However, more studies are still necessary to document these relationships. We examined 18 specimens of the cat-eyed snake Leptodeira annulata from a semi-arid region in Northeast Brazil. Eight taxa of parasites were found, with higher prevalence of cystacanths (Acanthocephala). Five nematode species (Hexametra boddaertii, Oswaldocruzia sp., Oxyascaris sp., Physaloptera sp. and Raillietnema spectans) and the pentastome Raillietiella furcocerca represent a new parasitism record for the host studied. Our results also showed that L. annulata could act as paratenic host for acanthocephalans. These results contribute to the knowledge of the helminth fauna of L. annulata.

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