Fine-scale spatial distribution ofmurundusstructures in the semi-arid region of Brazil

2017 ◽  
Vol 43 (3) ◽  
pp. 268-279 ◽  
Author(s):  
Henrique J. De Souza ◽  
Jacques H. C. Delabie
Keyword(s):  
Spatial Distribution ◽  
Arid Region ◽  
Fine Scale ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals Ocorrência de Galhas em Espécies de Croton do Parque Nacional Vale do Catimbau (PE) (Occurrence of Galls on Species of Croton Catimbau Valley Nacional Park (PE))

2011 ◽  
Vol 4 (3) ◽  
pp. 510 ◽  
Author(s):  
Maíra Honorato de Moura Silva ◽  
Luiz Oliveira da Costa Filho ◽  
Antônio Fernando Morais Oliveira ◽  
Jarcilene S. Almeida-Cortez
Keyword(s):  
Spatial Distribution ◽  
Arid Region ◽  
Population Abundance ◽  
Environmental Perturbations ◽  
Stem Gall ◽  
Loss Of Diversity ◽  
Ecological Importance ◽  
Semi Arid Region ◽  
Excellent Tool ◽  
Semi Arid

Insetos que induzem galhas podem constituir excelente ferramenta para estudos ambientais por serem sésseis, de fácil localização, abundantes e hospedeiro-específicos. Como bioindicadores respondem às perturbações ambientais mostrando perda de diversidade e alterações nas abundâncias populacionais tanto das espécies galhadoras como dos parasitoides. A importância ecológica das galhas despertou o interesse em descrever a morfologia e o padrão de distribuição espacial de galhas em três espécies de Croton (Croton adamantinus, C. argyrophyllus, C. grewioides) de região semi-árida. Para isso, foram levadas ao laboratório ramos de 10 indivíduos de cada espécie pra serem realizadas análise. Foram observadas, nas três espécies, galhas tanto foliares quanto caulinares com exceção de C. grewioides que só apresentou galhas foliares. A galha foliar do C. adamantinus apresentou coloração verde, pilosa, globóide, a galha caulinar mostrou-se de coloração marrom, glabra e ovóide. As galhas do C. argyrophyllus, tanto foliar quanto caulinar, apresentaram coloração amarelada, pilosa e globóide. Galhas em C. grewioides mostraram-se amareladas, pilosas, cilíndricas. As galhas de C. argyrophyllus estiveram presentes preferencialmente na face abaxial, região basal e borda da folha. Já as galhas em C. grewioides ocorreram em pequenas quantidades na face abaxial. Palavras-chave: Caatinga, Euphorbiaceae, Herbivoria.   Occurrence of Galls on Species of Croton Catimbau Valley Nacional Park (PE)   ABSTRACT Insects that induce galls can be an excellent tool for environmental studies because they are sessile, easy location, abundant and host-specific. As bioindicators respond to environmental perturbations showing loss of diversity and changes in population abundance of both species of parasitoids as galling. The ecological importance of galls sparked interest in describing morphology and pattern of spatial distribution of galls on three species of Croton (Croton adamantinus, C. argyrophyllus, C. grewioides) of semi-arid region. For this, they were taken to the laboratory branches 10 individuals of each species to be carried out analysis. Were observed in all three species, both leaf and stem galls with exception of C. grewioides only had leaf galls. The leaf gall of C. adamantinus presented color green, hairy, globose, stem gall proved to be brown, ovoid and glabrous. The galls of C. argyrophyllus both leaf and stem showed yellowish, globose and hairy. Galls in C. grewioides proved to be yellowish, hairy, cylindrical. The galls of C. argyrophyllus were present preferentially on abaxial, basal and edge of sheet. Since the galls in C. grewioides occurred in small quantities on abaxial surface.Keywords: Caatinga, Euphorbiaceae, Herbivonia.

scholarly journals Spatial distribution of soil carbon stocks in a semi-arid region of India

2018 ◽  
Vol 15 ◽  
pp. e00192 ◽  
Author(s):  
Tarik Mitran ◽  
Umakant Mishra ◽  
Rattan Lal ◽  
T. Ravisankar ◽  
K. Sreenivas
Keyword(s):  
Spatial Distribution ◽  
Soil Carbon ◽  
Arid Region ◽  
Carbon Stocks ◽  
Soil Carbon Stocks ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals STATISTICAL ANALYSIS OF THE SPATIAL RELASHIONSHIP OF CAATINGA AND PHYSIOGRAPHIC FACTORS THROUGH REMOTE DATA

FLORESTA ◽  
2019 ◽  
Vol 49 (4) ◽  
pp. 755
Author(s):  
Janisson Batista de Jesus ◽  
Mariana Mizutani Ribeiro ◽  
Tatiana Mora Kuplich ◽  
Bruno Barros de Souza ◽  
Dráuzio Correia Gama
Keyword(s):  
Spatial Distribution ◽  
Statistical Analysis ◽  
Arid Region ◽  
Factors Associated ◽  
Independent Variables ◽  
Caatinga Vegetation ◽  
Semi Arid Region ◽  
Relationship Of ◽  
The Relationship ◽  
Semi Arid

The caatinga is characteristic of the semi-arid region of Brazil, of significant coverage in the northeast of the country and, therefore, geoprocessing and statistical techniques can be important tools to analyze the environmental factors associated with its distribution. The present study had the objective of analyzing the relationship of: altimetry, slope, soil type and river proximity in the spatial distribution of the caatinga vegetation, using a database generated by geoprocessing techniques. NDVI was used, and statistical analysis was based on multiple regression and Pearson's correlation. The results show that the weather station is the only variable that presented a high determination coefficient with the caatinga vegetation (R2 = 0.956), while the other independent variables have weak or nonexistent correlation. With the techniques of geoprocessing was allowed to observe that the Caatinga has a generalist spatial distribution of occurrence, not having a defined pattern.

scholarly journals Variability and spatial distribution of hydrodynamic properties in soil with preserved Caatinga

RBRH ◽  
2021 ◽  
Vol 26 ◽  
Author(s):  
José Martins de França Neto ◽  
Artur Paiva Coutinho ◽  
Simone Di Prima ◽  
Saulo de Tarso Marques Bezerra ◽  
Severino Martins dos Santos Neto ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Arid Region ◽  
Water Infiltration ◽  
Soil Water Retention ◽  
Hydrodynamic Properties ◽  
Infiltration Process ◽  
Statistical Measures ◽  
Lack Of Information ◽  
Semi Arid Region ◽  
Semi Arid

ABSTRACT The functions of soil water retention and hydraulic conductivity are indispensable for the characterization and modeling of the infiltration and water transfer processes in the vadose zone. In the case of the Brazilian semi-arid region, characterized by the scarcity of water resources, there is a lack of information on the hydrodynamic properties of the soil. Also, these properties have numerous factors of variability, requiring the characterization of their magnitude and distribution in space. This research presents an analysis of the infiltration process and the hydrodynamic properties of the soil under native Caatinga forest, observing its spatial distribution. This vegetation is typical of the Brazilian semi-arid region. One developed a 48-point grid in an area of approximately 875 m2, and applied on it the Beerkan methodology. The analyzes were performed based on the application of the BEST-Slope algorithm and statistical measures of the position, dispersion, and adherence tests. The results showed medium to high variability indices for the hydrodynamic properties, with random spatial distribution, despite the verification of a homogeneous texture in the area. Thus, it was found that the soil structure was predominant in the processes of water infiltration.

The Molecular Characterization and Biological Assessment of the Leaves Extracts of Loofah Reveal their Nutraceutical Potential

2020 ◽  
Vol 11 ◽  
Author(s):  
Takoua Ben Hlel ◽  
Feten Belhadj ◽  
Fatih Gül ◽  
Muhammed Altun ◽  
Ayşe Şahin Yağlıoğlu ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Phenolic Compounds ◽  
Hela Cell ◽  
Arid Region ◽  
Biological Properties ◽  
Biological Assessment ◽  
Omega 3 ◽  
Hela Cell Lines ◽  
Semi Arid Region ◽  
Semi Arid

Background:: Luffa cylindrica is a plant that is widely distributed in Africa and Asia and it can be grown in regions with tropical or subtropical climates. Few patents dealt with Loofah biological properties, including some functional foods formulated from its leaves. Objective:: This study aimed to structurally and functionally characterize the bioactive compounds of L. cylindrica leaves grown in two different environments. Methods:: The extracts of L. cylindrica leaves collected from two Tunisian locations: Essouasi (LE), a semi-arid region and Medenine (LM) an arid region, were investigated for their phenolic compounds and fatty acids using HPLC/TOF-MS and GCMS techniques respectively. Furthermore, the antioxidant capacity was evaluated with DPPH, Chelating effect, Hydroxyl radical and Superoxide anion scavenging activities while the anticancer activity against HeLa cell lines was assessed using xCELLigence real time cell analyzer and lactate dehydrogenase cytotoxicity assay. Results:: The antiproliferative capacity of both extracts was time and dose-dependent with LE presenting the lowest HeLa cell index (CI = 0.035 ± 0.018, 250 μg/ml). LE also showed the best cytotoxic capacity (56.49 ± 0.8%) and antioxidant potential (IC50 = 54.41 ± 1.12 μg/ml for DPPH and 12.12 ± 0.07 μg/ml for chelating effet). 14 phenolic compounds were detected in LE with ferulic acid being the major compound (5128.5 ± 4.09 μg Phenols/g) while LM had only 6 phenolics. GCMS analysis showed the presence of omega-3 fatty acids in LE. Conclusions:: Our findings suggest that L. cylindrica leaves, especially when collected from semi-arid regions, are promising for formulating nutraceuticals of interest.

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