semiarid region [n] [US]/semi-arid region [n] [UK]

2010 ◽  
pp. 890-890
Keyword(s):  
Arid Region ◽  
Semiarid Region ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals Mapeamento da desertificação da Região de Desenvolvimento Sertão do São Francisco com base na cobertura vegetal e nas classes de solos (Desertification mapping of “Sertão” San Francisco Development Region based on the vegetation and the soil classes)

2015 ◽  
Vol 8 ◽  
pp. 510
Author(s):  
Iêdo Bezerra Sá ◽  
Tony Jarbas Ferreira Cunha ◽  
Tatiana Ayako Taura ◽  
Marcos Antônio Drumond
Keyword(s):  
San Francisco ◽  
Arid Region ◽  
The State ◽  
Soil Mapping ◽  
Semiarid Region ◽  
Environmental Services ◽  
Vegetation Types ◽  
Development Region ◽  
Semi Arid Region ◽  
Semi Arid

Na região Semiárida do Estado de Pernambuco existe grande diversidade na paisagem natural, onde a vegetação, os solos e o clima geram uma multiplicidade de situações que concorrem para formação de diferentes ecossistemas e habitats com grande potencial ecológico e ambiental. Nesta região, a vegetação é caracterizada por diferentes fisionomias, variando de áreas com formações arbustivas, com cobertura do solo muito escassa e quase ausente, a formações arbóreas com níveis de cobertura bastante densas. De modo análogo, nesta região ocorre uma grande variedade de solos, que por suas características, manejo e situação no relevo podem potencializar os processos erosivos, determinantes no desencadeamento da desertificação. Considerando as interrelações destas duas variáveis ambientais, este trabalho tem o objetivo de realizar um diagnóstico das áreas susceptíveis à desertificação da Região de Desenvolvimento Sertão do São Francisco - RDSF, tendo como base o cruzamento das informações da cobertura vegetal natural e das classes de solos. Para tanto, foram utilizados o recorte do mapeamento da cobertura vegetal e uso do solo e o recorte do mapeamento de solos da RDSF. Foram estabelecidos critérios para susceptibilidade da cobertura vegetal, assim como para as classes de solos presentes na área. Executou-se a intersecção destas duas bases de informação para o perfil da sensibilidade à desertificação. Os resultados mostram que a RDSF tem os seguintes valores das áreas em processos de desertificação: 1,77% na classe ausente ou fraca; 74,74% na classe moderada; 0,35% na classe acentuada e 23,14% na classe severa. Deste modo, observa-se que aproximadamente 98% da RDSF encontram-se na situação de sensibilidade à desertificação em que predominam as classes de Moderada a Severa. In the semiarid region of the state of Pernambuco there are plenty of biophysics where vegetation, climate, soils, and the various faces and the relationships and processes that take place among them generate the formation of different ecosystems and habitats with great potential ecological and environmental. There are a range of vegetation types, ranging from shrubby coverage areas up to very sparse and mostly absent vegetation areas, which demonstrated high desertification process occurring. Similarly, a variety of soils that is in the region along with vegetation makes this a region of great variation from the viewpoint of environmental supply. This article deals with the realization of a diagnosis of environmental sensitivity to desertification of São Francisco Development Region seeking spatialize the different situations in which the environment fulfills a greater or lesser extent, its role as provider of environmental services. For this, we used the cutting mapping of existing vegetation and soil mapping of the state and the established criteria, as well as edaphic vegetation cover, featuring the susceptibility to degradation and performed the intersection of these two bases of information to profile the sensitivity to desertification. The results show that São Francisco Development Region has the following values of areas undergoing desertification: 1.77% in weak class; 74.74% in the moderate class; 0.35% in sharp class, and 23.14% in severe class. Keywords: desertification, São Francisco, Semi-arid region, soils.   

scholarly journals Spatio-Temporal Response of Vegetation Indices to Rainfall and Temperature in A Semiarid Region

2020 ◽  
Vol 12 (5) ◽  
pp. 1939 ◽  
Author(s):  
Edith Olmos-Trujillo ◽  
Julián González-Trinidad ◽  
Hugo Júnez-Ferreira ◽  
Anuard Pacheco-Guerrero ◽  
Carlos Bautista-Capetillo ◽  
...  
Keyword(s):  
Arid Region ◽  
Climatic Factors ◽  
Time Lag ◽  
Vegetation Indices ◽  
Climatic Variables ◽  
Semiarid Region ◽  
Linear Regression Models ◽  
Spatio Temporal ◽  
Semi Arid Region ◽  
Semi Arid

In this research, vegetation indices (VIs) were analyzed as indicators of the spatio-temporal variation of vegetation in a semi-arid region. For a better understanding of this dynamic, interactions between vegetation and climate should be studied more widely. To this end, the following methodology was proposed: (1) acquire the NDVI, EVI, SAVI, MSAVI, and NDMI by classification of vegetation and land cover categories in a monthly period from 2014 to 2018; (2) perform a geostatistical analysis of rainfall and temperature; and (3) assess the application of ordinary and uncertainty least squares linear regression models to experimental data from the response of vegetation indices to climatic variables through the BiDASys (bivariate data analysis system) program. The proposed methodology was tested in a semi-arid region of Zacatecas, Mexico. It was found that besides the high values in the indices that indicate good health, the climatic variables that have an impact on the study area should be considered given the close relationship with the vegetation. A better correlation of the NDMI and EVI with rainfall and temperature was found, and similarly, the relationship between VIs and climatic factors showed a general time lag effect. This methodology can be considered in management and conservation plans of natural ecosystems, in the context of climate change and sustainable development policies.

scholarly journals Effects of polymer cyclohexane application on lentil pod shatter in semi-arid region of Turkey

2018 ◽  
Vol 64 (No. 3) ◽  
pp. 136-142 ◽  
Author(s):  
Aslan Hasan ◽  
Gayberi Mahmut ◽  
Kahraman Abdullah
Keyword(s):  
Arid Region ◽  
High Yield ◽  
Semiarid Region ◽  
Application Time ◽  
Crucial Feature ◽  
Pod Shatter ◽  
Semi Arid Region ◽  
Semi Arid ◽  
Selection Of ◽  
Plot Experiment

Pod shattering in lentil which is vital plant of dry lands is a crucial feature for high yield. Selection of lentil variety is very important in order to reduce pod shatter. Some of lentil varieties are very productive; however, shattering loss decreases profitable yields. In this study, reduction of pod shatter in lentil varieties was investigated with application of polymer cyclohexane compounds. An experiment was conducted with split-split-plot experiment design with two lentil varieties (‘Firat-87’ and ‘Cagil’), two application time (podset and 15 days before harvest (DBH)) and three application doses (0, 0.5, 2 l·ha<sup>–1</sup>) as triplicate during two years. Effects of application time on podset were found statistically insignificant and application of 0.5 l·ha<sup>–1</sup> dose was found effective for 15 DBH application time. As a result, 0.5 pod shatter polymer cyclohexane and 15 DBH was found as optimum doses and application time, respectively in order to reduce pod shatter loss by nearly 1% for semiarid region of Turkey.

A Study of Change in Agricultural and Forest Land in Gwalior City Using Satellite Imagery

2017 ◽  
Vol 9 (02) ◽  
pp. 109-112
Author(s):  
Padam Jee Omar ◽  
Nitesh Gupta ◽  
Ravi Prakash Tripathi ◽  
Shiwanshu Shekhar ◽  
Surender .
Keyword(s):  
Remote Sensing ◽  
Land Use ◽  
Land Cover ◽  
Arid Region ◽  
Local Population ◽  
High Rate ◽  
Semiarid Region ◽  
Change Analysis ◽  
Semi Arid Region ◽  
Semi Arid

The relative evaluation of land use and land cover for various uses such as forest, agriculture and water bodies etc. is the important issue in the semiarid region. Application of Remote Sensing technology for Land Use and Land Cover (LULC) change analysis has been carried out in semi-arid region of Madhya Pradesh, central part of India and found that the use of remote sensing along with Survey of India toposheets could be used appropriately for LULC mapping. The semi-arid regions are characterized by erratic rainfall and high rate of vegetation dynamics. The increasing biotic pressure together with increasing human demands exerts pressure on the available land resources all over the region. Therefore, in order to have best possible use of land, it is not only necessary to have the information on the existing LULC, but also to monitor the dynamic land use resulting because of increasing demands aroused from the growing population. Continuous overexploitation of natural resources like land, water, and forest has caused serious threat to the local population of the semi-arid region. This causes problems like little scope for soil moisture storage, high rate of soil erosion, declining groundwater level and shortage of drinking water

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.

A new species of Mucor (Mucoromycotina, Mucorales) isolated from an enclave of Upland Atlantic Forest in the semi-arid region of Brazil

Phytotaxa ◽  
2018 ◽  
Vol 351 (1) ◽  
pp. 53
Author(s):  
CARLOS A.F. DE SOUZA ◽  
KERSTIN VOIGT ◽  
LUCIANA SARTORI GURGEL ◽  
THALLINE R.L. CORDEIRO ◽  
RAFAEL J.V. OLIVEIRA ◽  
...  
Keyword(s):  
New Species ◽  
Arid Region ◽  
Molecular Data ◽  
Soil Samples ◽  
Semiarid Region ◽  
Lsu Rdna ◽  
Good Growth ◽  
Semi Arid Region ◽  
A New Species ◽  
Semi Arid

During a survey of Mucorales in fragments of an Atlantic Upland Forest inserted in the semiarid region of Pernambuco, Brazil, a specimen of Mucor was isolated from soil samples. The specimen was characterized based on morphological, physiological and molecular data (ITS and LSU rDNA regions). The isolate produces intensely branched sporangiophores commonly with between one and several septa with mostly applanate columellae. The sporangiophores were smooth-walled and varied in shape and size, while some were subglobose. The best growth was at 25°C but there was also good growth at 30°C. Based on the evidence of the analyzed datasets a new species of Mucor is proposed. A detailed description of the new specimen of Mucor from the Brazilian semi-arid region are provided.

scholarly journals Índice de Vulnerabilidade Geral para municípios do semiárido brasileiro

2021 ◽  
Vol 14 (1) ◽  
pp. 310
Author(s):  
Jaricélia Patrícia Oliveira Sena ◽  
João Miguel Moraes Neto ◽  
Daisy Beserra Lucena
Keyword(s):  
Arid Region ◽  
Heat Waves ◽  
Rio Grande ◽  
Vulnerability Index ◽  
High Index ◽  
Semiarid Region ◽  
Human Society ◽  
Socioeconomic Vulnerability ◽  
Semi Arid Region ◽  
Semi Arid

Nas últimas décadas, estudos científicos que enfatizam a temática da vulnerabilidade e adaptação à mudança do clima vêm crescendo devido aos impactos de alguns eventos extremos como, chuva em excesso, escassez, ondas de calor afetando diretamente a sociedade humana. Neste contexto, o presente estudo objetivou analisar o Índice de Vulnerabilidade Geral (IVG), que se baseia em indicadores socioeconômicos, epidemiológicos e climáticos, em municípios distribuídos nos estados inseridos na região semiárida brasileira. Neste caso, especificamente, o Rio Grande do Norte, Paraíba e Pernambuco. Os dados utilizados para o recorte temporal entre 1995 e 2018 são do Instituto Brasileiro de Geografia e Estatística (IBGE), do Departamento de Informática do SUS (DATASUS) e do Instituto Nacional de Meteorologia (INMET). Em relação aos resultados, eles evidenciam o índice de vulnerabilidade socioeconômica (IVSE) em relação aos demais, destacando as categorias de demografia, educação e saneamento. O município de Campina Grande foi o que apresentou alto índice de vulnerabilidade epidemiológica (IVE), em razão dos altos índices de dengue (0,733), leptospirose (1,000) e esquistossomose (1,000). Já os municípios de Apodi e Cruzeta exibiram alto índice de vulnerabilidade climática (IVC) decorrentes dos elevados números de eventos extremos de chuva.  Ademais, o índice de vulnerabilidade geral (IVG) indicou que as dimensões mais acentuadas para indícios de aumento foram o IVC e o IVSE, com exceção de Campina Grande que apresentou alto IVE. General Vulnerability Index Regarding the Municipalities in Brazilian Semi-Arid Region ABSTRACTIn recent decades, some scientific studies that emphasize the issue of vulnerability and adaptation to the climate change have been growing due to the impacts of some extreme events such as excessive rain, drought, heat waves that directly affect human society. In this context, the aim of this study it is to analyze though means of the General Vulnerability Index (IVG), which is based on socioeconomic, epidemiological and climatic indicators, in municipalities distributed in the states of Rio Grande do Norte, Paraíba, and Pernambuco, all inserted in the semiarid region of Brazil. The data that had been used refers to a period from 1995 to 2018 and they were based on the Brazilian Institute of Geography and Statistics (IBGE), the Department of Informatics of SUS (DATASUS), and the National Institute of Meteorology (INMET). Regarding the results, they show the socioeconomic vulnerability index (IVSE) in relation to the others, highlighting the categories of demography, education and sanitation. According to data Campina Grande was the place that presented high index of epidemiological vulnerability (IVE), as a result of the high rates of dengue (0.733), leptospirosis (1,000) and schistosomiasis (1,000). The municipalities of Apodi and Cruzeta exhibited a high index of climatic vulnerability (CVI) due to the elevated occasions of extreme rains. In addition, the general vulnerability index (IVG) indicated that the most accentuated dimensions for evidence of increase were IVC and IVSE.Keywords: Indicators; Socioeconomic; Epidemiological; Climate

scholarly journals Wastewater reuse in irrigation: short-term effect on soil carbon and nitrogen stocks in Brazilian semi-arid region

2021 ◽  
Vol 16 (1) ◽  
pp. 1
Author(s):  
Marcus Metri Corrêa ◽  
Marília Costa Cavalcanti ◽  
Dário Costa Primo ◽  
Fernando Cartaxo Rolim Neto ◽  
Jean Manuel Martins ◽  
...  
Keyword(s):  
Arid Region ◽  
Agricultural Land ◽  
Treated Wastewater ◽  
Semiarid Region ◽  
Main Process ◽  
Carbon And Nitrogen ◽  
C And N ◽  
Semi Arid Region ◽  
Semi Arid ◽  
Carbon And Nitrogen Stocks

The main process that opposes the Greenhouse Effect is called “carbon sequestration”, a phenomenon that essentially seeks to establish a dynamic balance between greenhouse gas (GHG) emissions from the immobilization of its elements, especially C and N. This work evaluated the stocks of carbon and nitrogen in soils of the Brazilian semi-arid submitted to irrigation with treated wastewater from domestic sewage. For this purpose, the carbon and nitrogen stocks in the soil of the semi-arid region of Brazil were compared for four different uses: Open Native Caatinga (ONC); Treated Wastewater Effluent Irrigation (TSEI); Surface Water Irrigation (SWI); and Traditional Rainfed Agriculture (TRA). The hypothesis considered in this research was that the application of treated effluents in agriculture, besides being an alternative that can mitigate the problem of water scarcity of the semiarid region, is also capable of influencing the storage capacity of C and N in the soil, due to its organic load. The results indicate that among the different land uses evaluated, soil C and N stocks were highest in ONC, and decreased with the agricultural land use. The greatest accumulation of C and N in Caatinga is due to the presence of forest litter, and the influence of irrigation with treated sewage effluent was not detected in the present study. It can be concluded that the contribution of vegetation residues to the soil surface is the main factor contributing to C and N storage.

A new species of Mucor (Mucoromycotina, Mucorales) isolated from an enclave of Upland Atlantic Forest in the semi-arid region of Brazil

Phytotaxa ◽  
2018 ◽  
Vol 351 (1) ◽  
pp. 53 ◽  
Author(s):  
CARLOS A.F. DE SOUZA ◽  
KERSTIN VOIGT ◽  
LUCIANA SARTORI GURGEL ◽  
THALLINE R.L. CORDEIRO ◽  
RAFAEL J.V. OLIVEIRA ◽  
...  
Keyword(s):  
New Species ◽  
Arid Region ◽  
Molecular Data ◽  
Soil Samples ◽  
Semiarid Region ◽  
Lsu Rdna ◽  
Good Growth ◽  
Semi Arid Region ◽  
A New Species ◽  
Semi Arid

During a survey of Mucorales in fragments of an Atlantic Upland Forest inserted in the semiarid region of Pernambuco, Brazil, a specimen of Mucor was isolated from soil samples. The specimen was characterized based on morphological, physiological and molecular data (ITS and LSU rDNA regions). The isolate produces intensely branched sporangiophores commonly with between one and several septa with mostly applanate columellae. The sporangiophores were smooth-walled and varied in shape and size, while some were subglobose. The best growth was at 25°C but there was also good growth at 30°C. Based on the evidence of the analyzed datasets a new species of Mucor is proposed. A detailed description of the new specimen of Mucor from the Brazilian semi-arid region are provided.

scholarly journals Knowledge management for the sustainable development of the semi-arid region in Northeastern Brazil

2019 ◽  
Vol 49 (4) ◽  
Author(s):  
Lydia Maria Pinto Brito ◽  
Naeldson Expedito Alves da Silva ◽  
Ahiram Brunni Cartaxo de Castro ◽  
Cristine Hermann Nodari ◽  
Arthur William Pereira da Silva
Keyword(s):  
Sustainable Development ◽  
Knowledge Management ◽  
Arid Region ◽  
Northeastern Brazil ◽  
Semiarid Region ◽  
Structured Interviews ◽  
The Sustainable Development ◽  
Strategic Processes ◽  
Semi Arid Region ◽  
Semi Arid

ABSTRACT: The objective of this study was to analyze the knowledge management perception in managers of a public university in the Brazilian Northeastern Semiarid Region, especially their tactical and strategic processes to produce knowledge about this region. The analysis was conducted according to the perspective of administrators at this university with a view to the sustainable development of the region. This was a qualitative descriptive study. All data were collected through structured interviews, using a questionnaire based on the Knowledge Management Diagnosis as a structuring model. Results showed that Knowledge Management is still a maturing practice. However, knowledge management is making institutional changes feasible and generating organization capacity to implement solutions and promote the sustainable development of the semi-arid region in the Northeastern Brazil.

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