Characterization and diversity of macroin-vertebrates in groundwater in the region of Souk-Ahras (North-East of Algeria)

Chorfi, Amira; Hafid, Hinda; Baaloudj, Affef; Rizi, Hadia; Aouissi, Hani Amir; Chaib, Sara; Ababsa, Mostafa; Noua, Allaoua; Houhamdi, Moussa

doi:10.2478/eko-2022-0022

Cited by 4 publications

(1 citation statement)

References 20 publications

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“…The lower Sahara is, in fact, a vast backfilling plain, which has slowly subsided since the upper Cretaceous to the Quaternary. This basin is filled with post-Eocene continental Tertiary deposits, made up of agglomerated sands intercalated with clay layers and clay-sand banks [33]. The Neogene deposits, which are mainly the product of the dismantling of the Atlas chain, completely mask the underlying folded structures.…”

Section: Geological and Hydrogeological Settingmentioning

confidence: 99%

Chemometrics of the Environment: Hydrochemical Characterization of Groundwater in Lioua plain (North Africa) using Time Series and Multivariate Statistical Analysis

Athamena¹,

Gaagai²,

Aouissi³

et al. 2022

Preprint

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Drinking water quality is a major concern, especially in African countries. This manuscript aims to analyze the chemical composition of Lioua’s groundwater in order to determine the geological processes influencing the chemical elements' composition and origin. Therefore, chemometrics techniques such as multivariate statistical analysis (MSA) and time series methods (TSM) are used. Indeed, MSA includes a component analysis (PCA) and a cluster analysis (CA), while au-tocorrelation analysis (AA) supplemented by simple spectral density analysis (SDA) is used for TMS. PCA displays three main factors explaining a total variance (TV) of 85.01 %. Factors 1, 2, and 3 are 68.72%, 11.96%, and 8.89 % of TV, respectively. In the CA, three groups were controlled by TDS and EC. G1 reveals a close association between SO42−, K+, Ca2+, and TDS; G2 reveals a close association between Na+, Cl−, Mg2+, and EC; G3 shows the dissociation of bicarbonates HCO3− and NO3− from other chemical elements. AA shows a linear interrelationship of EC, Mg2+, Na+, K+, Cl−, and SO42−. However, NO3− and HCO3− indicate uncorrelated characteristics with other parameters. For SDA, the correlograms of Mg2+, Na+, K+, Cl−, and SO42− have a similar trend with EC. None-theless, pH, Ca2+, HCO3− and NO3− exhibit multiple peaks related to the presence of several dis-tinct cyclic mechanisms. The methods enabled the authors to conclude that the geochemical processes influencing the chemical composition are: (i) dissolution of evaporated mineral depos-its, (ii) water-rock interaction, and (iii) evaporation process. In addition, Groundwater exhibits two bipolar characteristics, one recorded with negative and positive charges on pH and Ca+ and another recorded only with negative charges on HCO3− and NO3−. On the other hand, SO42-, K+, Ca2+, and TDS are the major predominant elements in the groundwater’s chemical composition. The major participation of salts and chlorides is in the electrical conductivity of water. The dominance of the lithological factor in the overall mineralization of the Plio-Quaternary surface aquifer waters. The origins of HCO3− and NO3− are different. Indeed, carbonated for HCO3- has a carbonate origin, whereas NO3– has an anthropogenic origin. The salinity was affected by Mg2+, SO42-, Cl-, Na+, K+, and EC. Ca2+, HCO3− and NO3− are resulted from human activity fertilizers, the carbonate facies outcrops, and domestic sewage.

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Section: Geological and Hydrogeological Settingmentioning

confidence: 99%

Chemometrics of the Environment: Hydrochemical Characterization of Groundwater in Lioua plain (North Africa) using Time Series and Multivariate Statistical Analysis

Athamena¹,

Gaagai²,

Aouissi³

et al. 2022

Preprint

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A Scientometric Macroanalysis of Coral Reef Research in the World

Azra

Aouissi

Hamma

et al. 2023

Ekológia (Bratislava)

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Marine and coastal biodiversity is crucial to the planet’s functioning and offers ecosystem services that guarantee the health, wealth, and well-being of the entire humanity. This is why, evaluating the current body of research on coral reefs is essential for understanding the unprecedented growth of this field, which covers many topics including climate change, biotic interactions, bioresources, future bioprospecting, and biodiversity in general. Such an evaluation requires both descriptive summaries and co-citation analyses to understand the expansive nature of this particular research and identify research gaps. Given the importance of the topic and the fact that it is insufficiently addressed, this study fills in a gap regarding coral reefs studies. We analyzed coral reef research published in the Web of Science Core Collection database between 1970 and 2021, using the CiteSpace software. This gave a total of 20,362 records, focusing on variables including the list of contributors (author, affiliation, and country), total publications over time, dual map overlay, co-citation analysis (co-cited author and documents), cluster networks, and popular keywords and their burstness. We found that coral reef publications increased over time, with coastal countries (the USA, Australia, and Japan) being among the highest contributors. Researchers from Australia, New Zealand, and the USA are the top producers of coral reef research worldwide. Unsurprisingly, the journal Coral Reefs was the most productive journal. Interestingly, we found that keywords such as “great barrier reef,” “climate change,” and “predation” were among the top cited and most influential in coral reef science. To our knowledge, this is the first study to identify trends in coral reef research using scientometric analyses based on the CiteSpace software.

show abstract

Chemometrics of the Environment: Hydrochemical Characterization of Groundwater in Lioua Plain (North Africa) Using Time Series and Multivariate Statistical Analysis

et al. 2022

View full text Add to dashboard Cite

This study aims to analyze the chemical composition of Lioua’s groundwater in order to determine the geological processes influencing the composition and origin of its chemical elements. Therefore, chemometrics techniques, such as multivariate statistical analysis (MSA) and time series methods (TSM) are used. Indeed, MSA includes a component analysis (PCA) and a cluster analysis (CA), while autocorrelation analysis (AA), supplemented by a simple spectral density analysis (SDA), is used for the TMS. PCA displays three main factors explaining a total variance (TV) of 85.01 %. Factors 1, 2, and 3 are 68.72%, 11.96%, and 8.89 % of TV, respectively. In the CA, total dissolved solids (TDS) and electrical conductivity (EC) controlled three groups. The elements SO42−, K+, and Ca2+ are closely related to TDS, the elements Na+, Cl−, and Mg2+ are closely related to CE, while HCO3− and NO3− indicate the dissociation of other chemical elements. AA shows a linear interrelationship of EC, Mg2+, Na+, K+, Cl−, and SO42−. However, NO3− and HCO3− indicate uncorrelated characteristics with other parameters. For SDA, the correlograms of Mg2+, Na+, K+, Cl−, and SO42− have a similar trend with EC. Nonetheless, pH, Ca2+, HCO3− and NO3− exhibit multiple peaks related to the presence of several distinct cyclic mechanisms. Using these techniques, the authors were able to draw the following conclusion: the geochemical processes impacting the chemical composition are (i) dissolution of evaporated mineral deposits, (ii) water–rock interaction, and (iii) evaporation process. In addition, the groundwater exhibits two bipolar characteristics, one recorded with negative and positive charges on pH and Ca+ and another recorded only with negative charges on HCO3− and NO3−. On the other hand, SO42−, K+, Ca2+, and TDS are the major predominant elements in the groundwater’s chemical composition. Chloride presence mainly increases the electrical conductivity of water. The lithological factor is dominant in the overall mineralization of the Plio Quaternary surface aquifer waters. The origins of HCO3− and NO3− are as follows: HCO3− has a carbonate origin, whereas NO3– has an anthropogenic origin. The salinity was affected by Mg2+, SO42−, Cl−, Na+, K+, and EC. Ca2+, HCO3−, and NO3− result from human activity such as the usage of fertilizers, the carbonate facies outcrops, and domestic sewage.

show abstract

Characterization and diversity of macroin-vertebrates in groundwater in the region of Souk-Ahras (North-East of Algeria)

Cited by 4 publications

References 20 publications

Chemometrics of the Environment: Hydrochemical Characterization of Groundwater in Lioua plain (North Africa) using Time Series and Multivariate Statistical Analysis

Chemometrics of the Environment: Hydrochemical Characterization of Groundwater in Lioua plain (North Africa) using Time Series and Multivariate Statistical Analysis

A Scientometric Macroanalysis of Coral Reef Research in the World

Chemometrics of the Environment: Hydrochemical Characterization of Groundwater in Lioua Plain (North Africa) Using Time Series and Multivariate Statistical Analysis

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