Irrigation for food production in the semi-arid region of northeast Brazil: case studies in Petrolina, Juazeiro, Vale do Açu and Agrovila Canudos in Ceará-Mirim

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.

Download Full-text

Cytogenetic analysis of nuclear abnormalities in the erythrocytes of gecko lizards (Phyllopezus periosus) collected in a semi-arid region of northeast Brazil: Possible effects of natural background radioactivity

Mutation Research/Genetic Toxicology and Environmental Mutagenesis ◽

10.1016/j.mrgentox.2021.503346 ◽

2021 ◽

Vol 865 ◽

pp. 503346

Author(s):

Jadna Maria Silva ◽

Júlio Alejandro Navoni ◽

Viviane Souza Amaral ◽

Eliza Maria Xavier Freire

Keyword(s):

Cytogenetic Analysis ◽

Arid Region ◽

Northeast Brazil ◽

Natural Background ◽

Nuclear Abnormalities ◽

Semi Arid Region ◽

Semi Arid

Download Full-text

FLORISTIC AND VEGETATIONAL ASPECTS OF AN INSELBERG IN THE SEMI-ARID REGION OF NORTHEAST BRAZIL

Edinburgh Journal of Botany ◽

10.1017/s0960428609005241 ◽

2009 ◽

Vol 66 (2) ◽

pp. 329-346 ◽

Cited By ~ 13

Author(s):

P. Gomes ◽

M. Alves

Keyword(s):

Species Richness ◽

Arid Region ◽

Floristic Composition ◽

Northeastern Brazil ◽

Northeast Brazil ◽

Surrounding Area ◽

Floristic Inventory ◽

Exposed Rock ◽

Semi Arid Region ◽

Semi Arid

Inselbergs are rocky environments that support a unique flora distinct from that of the surrounding area. The objectives of this work were to conduct a floristic inventory of an inselberg in the semi-arid region of Northeast Brazil, and to investigate the relationship between its flora and the flora of the surrounding area. The following questions were addressed: is the species richness comparable to other inselbergs in northeastern Brazil; is the floristic composition of the inselberg more similar to other inselbergs or to the surrounding Caatinga vegetation; and do the similarities in the floristic composition of inselbergs depend on the distance between them? This work documents 201 species in 62 families. Cyperaceae (28 spp.), Euphorbiaceae (19), Poaceae (15), Orchidaceae (11) and Bromeliaceae (9) are the most species-rich families. On the inselberg the plants are distributed in islands found on exposed rock, in fissures and in depressions in the rock. Variations in species richness in the region were assessed by comparison of floristic inventories conducted in other inselbergs of the semi-arid region with those of this study. The flora of the inselberg under investigation is more similar to the flora of other nearby inselbergs than to the vegetation of the surrounding semi-arid region.

Download Full-text

Analysis of the NDVI Temporal Dynamics in Semi-arid Ecosystems: Brazilian Caatinga and African Western Sahel (Análise da Dinâmica Temporal do NDVI nos Ecossistemas Semi-áridos: Caatinga Brasileira e Sahel Ocidental Africano)

Revista Brasileira de Geografia Física ◽

10.26848/rbgf.v4i2.232655 ◽

2011 ◽

Vol 4 (2) ◽

pp. 300 ◽

Cited By ~ 2

Author(s):

Humberto Alves Barbosa ◽

T.V. Lakshimi Kumar ◽

Ivon Wilson da Silva Junior

Keyword(s):

El Niño ◽

Arid Region ◽

Temporal Dynamics ◽

El Nino ◽

Arid Ecosystems ◽

Northeast Brazil ◽

Vegetation Types ◽

Semi Arid Region ◽

Semi Arid ◽

African Sahel

Os resultados indicaram que o efeito causado pelo evento El Niño, nos vários tipos de vegetação na região semi-árida do Nordeste do Brasil, durante as duas últimas décadas do século passado, apresentou diferentes padrões sazonais e interanuais dos tipos de vegetação no Sahel africano. A amplitude sazonal na variação do Índice de Vegetação Diferença Normalizada – NDVI, no Sahel Africano não foi alterada pelo efeito climático do El Niño, no entanto, na região semi-árida do Nordeste do Brasil, os tipos de vegetação foram afetados durante os eventos El Niño. Além disso, observou-se que o NDVI varia de acordo com as condições climáticas locais, apresentando uma lacuna temporal entre a ocorrência de precipitação e absorção de água disponível na vegetação. Esta informação é importante para mostrar condições de contorno para os modelos climáticos e também para a previsão numérica de tempo. Palavras-chave: Vegetação, Aridez . Satelite Análise da Dinâmica Temporal do NDVI nos Ecossistemas Semi-áridos: Caatinga Brasileira e Sahel Ocidental Africano ABSTRACT The results indicated that the effect caused by the El Niño event in the various types of vegetation in the semi-arid region of Northeast Brazil during the last two decades of the last century, presented a differing seasonal and interannual patterns from the vegetation types in the African Sahel. The seasonal amplitude of Normalized Difference Vegetation Index - NDVI variation in the African Sahel was not altered by the climatic effect of El Niño, however, in the semi-arid region of Northeast Brazil, the vegetation types were affected during the El Niño events. Furthermore, it was observed that the NDVI varies according to the local climatic conditions, presenting a temporal gap between the precipitation occurrence and water absorption available from the vegetation. This information is important to show contour conditions for climatic models and also for the weather numerical forecasting. Keywords: Vegetation, drought, satellite.

Download Full-text

Seepage and groundwater recharge in sandy soils of the semi-arid region of Picos, Northeast Brazil

Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen ◽

10.1127/njgpa/225/2002/85 ◽

2002 ◽

Vol 225 (1) ◽

pp. 85-101 ◽

Cited By ~ 2

Author(s):

Dietrich Halm ◽

Thomas Gaiser ◽

Karl Stahr

Keyword(s):

Groundwater Recharge ◽

Arid Region ◽

Sandy Soils ◽

Northeast Brazil ◽

Semi Arid Region ◽

Semi Arid

Download Full-text

Selectivity of Pre and Postemergence Herbicides in Single or Combined Applications in Castor Crop

Agronomy ◽

10.3390/agronomy11010019 ◽

2020 ◽

Vol 11 (1) ◽

pp. 19

Author(s):

Augusto G. F. Costa ◽

Valdinei Sofiatti ◽

Cleber D. G. Maciel ◽

Jalmi G. Freitas ◽

Gleibson D. Cardoso ◽

...

Keyword(s):

Weed Management ◽

Arid Region ◽

Field Experiments ◽

Ricinus Communis ◽

Northeast Brazil ◽

Ricinus Communis L ◽

Chlorimuron Ethyl ◽

Semi Arid Region ◽

Postemergence Herbicides ◽

Semi Arid

One of the main challenges in castor crop (Ricinus communis L.) production is efficient weed management mainly due to limited options of selective herbicides. This study evaluated the selectivity of herbicides applied alone or in combination in pre- and postemergence applications in castor crop. Two field experiments were carried out under irrigation conditions in a semi-arid region of Northeast Brazil. It was found that the visual symptoms of phytointoxication of the herbicides used on castor were mild in both experiments. Consequently, there were no significant interferences on plant height, number of racemes, and grain (seed) yield. Pre-emergence applications (g ha−1) of trifluralin (1800), pendimethalin (1500), clomazone (750), clomazone + trifluralin (750 + 1800), and clomazone + pendimethalin (750 + 1500) followed by chlorimuron-ethyl in postemergence (15 g ha−1) are selective to castor. The application (g ha−1) of pendimethalin + clomazone (1000 + 500) in pre-emergence, associated with chlorimuron-ethyl (10 and 15), metamitron (2800 and 4200), ethoxysulfuron (60 and 80), or halosulfuron-methyl (75 and 112.5) in one or two applications in postemergence, as single or split applications, in an interval of 14 days, are selective to castor crop.

Download Full-text

Aspectos humanos, geográficos e meteorológicos do nordeste brasileiro

Anuário do Instituto de Geociências - UFRJ ◽

10.11137/1998_0_21-26 ◽

1998 ◽

Vol 21 ◽

pp. 21-26

Author(s):

Julio Buchmann

Keyword(s):

Arid Region ◽

Northeast Brazil ◽

Semi Arid Region ◽

Strong Situation ◽

Semi Arid

The survival human conditions of life in the Northeast Brazil is very hard. We have a very strong situation of proverty in the semi-arid region and this must be changed.

Download Full-text