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

Sustainability, Journal Year: 2022, Volume and Issue: 15(1), P. 20 - 20

Published: Dec. 20, 2022

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

Language: Английский

---

Does melanin-based plumage coloration reflect health status of free-living birds in urban environments?

Avian Research, Journal Year: 2021, Volume and Issue: 12(1)

Published: Sept. 14, 2021

Abstract Background Ecological functions and processes in urban ecosystems are governed by various human activities. City-adapted city-exploiting animal species expected to present certain specific behavioral physiological traits comparison city-avoiders or conspecific individual frequenting less urbanized rural environments. A trait of high importance, the plumage color polymorphism has been selected as main study model was correlated with different morphological parameters highlight its importance determining possible health status Feral Pigeons ( Columba livia ) North African habitats. Methods Different body morphometrics, hematological hemoparasitic were quantified on free-living environments northern Algeria. Moreover, melanin-based coloration (MBC) measured data collected at scale previous using linear non-linear modeling approaches. Results Plumage MBC scores sampled ranged between 0.3% 74.8%. Among 12 measured, weight, tail length total deemed be positively MBC. Darker morphs appeared have more hemoparasites compared lighter pigeons. Quite same observation goes immunity but trends. The number monocytes granulocytes increased increase levels morphs, while pigeons exhibited negative relationships white blood cells. Conclusions Despite existence a studies demonstrating phenotypic directional selection, further undoubtedly necessary understand detail underlying mechanisms life-history strategies differently colored individuals. Findings this correlative open exciting perspectives revealing that can considered good indicator adaptation changes

Language: Английский

---

Avifauna of M’Zab region (Ghardaïa, Algerian Sahara): checklist and overview of the current status

Zoology and Ecology, Journal Year: 2023, Volume and Issue: unknown, P. 22 - 35

Published: Jan. 1, 2023

Despite the lack and irregularity of rainfall, high temperatures, limited food resources, desert areas, with their oases wetlands, are considered to be an essential stopover for birds important place wintering breeding. In this study, we made a list all recorded in M’Zab region at Ghardaïa (Algerian Sahara) from 2015 2022 using point count method. We found 203 species (69 which were waterbirds), belonging 23 orders 48 families. The most abundantly represented Passeriformes, 18 families 91 (44.83%). 84.24% occurred followed by pre-urban areas (40.39%), palm groves agricultural crops (39.90%). As phenological status birds, 51 breeding species, 38 sedentary, 10 migratory, three occasionally nesting waterbirds. There 122 non-breeding 81 passage visitors 41 species. Status remaining 30 is uncertain.

Language: Английский

---

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

Published: Nov. 14, 2022

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

Language: Английский

---

The composition of time-series images and using the technique SMOTE ENN for balancing datasets in land use/cover mapping

Acta Montanistica Slovaca, Journal Year: 2022, Volume and Issue: 27, P. 342 - 359

Published: July 28, 2022

Monitoring Land-use/land-cover (LULC) changes are a significant challenge for sustainable spatial planning, particularly in response to transformation and degenerative landscape processes. These disturbances lead the vulnerability of inhabitants habitat climate socio-economic development region. Several studies have proposed different methods techniques monitor temporal LULC. Machine learning is more popular method. However, problem data imbalance challenge, classification results tend bias majority classes unbalanced data. Therefore, this study's objective develop state-of-the-art technique reduce LULC Vietnam based on machine SMOTE (Synthesizing Minority Oversampling Technology) with Edited Nearest Neighbor (ENN). Various statistical indices, including Kappa Accuracy, been used assess performance Land-use/cover. The indicate that integrating oversampling under-sampling ENN gave better overall accuracy generalization. We also find expected proportion chance agreement after higher than before (Kappa score 0.905244 0.974379, respectively). This study provides an effective method land cover change Vietnam; it plays role as framework other relevant research related change, which can support planning management territory.

Language: Английский

---

Spatial Evaluation of Dengue Transmission and Vector Abundance in the City of Dhaka, Bangladesh

Geographies, Journal Year: 2023, Volume and Issue: 3(2), P. 268 - 285

Published: April 14, 2023

In recent years, many urban areas in low and middle income countries have experienced major dengue epidemics, the city of Dhaka, capital Bangladesh, is one them. Understanding models based on land cover use relation to vector abundance possible disease transmission can be a epidemiological tool identifying incidence prevalence. Demographic human behavioral factors also play role determining microenvironments for entomological distribution—which risk factor epidemicity. Data collected from cross-sectional survey Dhaka during monsoon season 2012 two serological surveys—one pre-monsoon another post-monsoon 2012—were analyzed this study. A total 898 households 1003 containers with water were inspected, 1380 Ae. aegypti pupae 4174 larvae counted these containers. All Stegomyia indices found highest central business residential mixed zone. The odds ratios seroprevalence, including sex, age, self-reported febrile illness previous six months, travel last calculated; age distribution was highly significant (p = value < 0.0001). study offers clear patterns viral transmission, dynamics, their association critical spatial dimensions.

Language: Английский

---

Diversity and Abundance of Breeding Birds, Habitat, and Nesting Substrate Selection in Urban Areas: A Relevant Case from the Southern Slope of the Mediterranean

International Journal of Zoology, Journal Year: 2023, Volume and Issue: 2023, P. 1 - 10

Published: March 24, 2023

Urban areas may affect the richness of avian species. The abundance and diversity urban landscapes offer breeding habitats nesting resources for urban-adapted In our study, we investigated birds in Fez’s historical city (Morocco). We used line-transects to search nests species, populations, counting sites predicting factors (foraging, resources, urbanization). Furthermore, four green gardens, old walls, farms, forests were prospected birds. Among 13 species including 12 resident-breeders, one migrant, a total 109 documented. Five Turdus merula, Sylvia atricapilla, Spilopelia senegalensis, Columba livia, Coloeus monedula encountered gardens; Athene noctua, Sturnus unicolor, Passer domesticus, Tachymarptis melba observed walls. Falco tinnunculus, Fringilla coelebs, Accipiter nisus occurred forests; Streptopelia decaocto farms. recorded divided between cavities (50 nests) trees (59 nests). spaces, distributed among Olea europaea (17), Citrus aurantium (15), Bambusa vulgaris (11), Eucalyptus globulus (7). contrast, oleaster Cupressus sp. hosted only tree each, while Populus Washingtonia filifera nest each. Most rich close water sources. On contrary, number decreased as surface distance habitat center increased. Our data revealed diversity, use, substrates bird communities Morocco Southern slope Western Palearctic. Future plans must integrate measures provide suitable such walls high spaces enhance their performances, thus promoting well-being population via increasing biodiversity.

Language: Английский

---

Forest specialist species in the urban landscape: Do different levels of urbanization affect the movements of Forest Red-tailed Black Cockatoos (Calyptorhynchus banksii naso)?

Avian Conservation and Ecology, Journal Year: 2022, Volume and Issue: 17(1)

Published: Jan. 1, 2022

Rycken, S. J. E., K. Warren, L. Yeap, R. Donaldson, P. Mawson, Dawson, and M. Shephard. 2022. Forest specialist species in the urban landscape: Do different levels of urbanization affect movements Red-tailed Black Cockatoos (Calyptorhynchus banksii naso)? Avian Conservation Ecology 17(1):11. https://doi.org/10.5751/ACE-02061-170111

Language: Английский

---

Developing a Land Suitability Model for Cereals in the Algerian Sahara Using GIS and Hierarchical Multicriteria Analysis

International Journal of Agriculture and Natural Resources, Journal Year: 2022, Volume and Issue: 49(1), P. 36 - 50

Published: Jan. 1, 2022

Determining land suitability is a preliminary procedure to define and determine fitness for given type of production. A analysis performed with inadequate methods will not guarantee successful or significant process. The current attempt consider new strategies techniques the Algerian agricultural systems comes as part process reflection that aims understand resource planning agriculture, specifically in Ouargla, Algeria. aim study also present based on use geographic information (GIS) hierarchical multicriteria analysis; this has demonstrated its relevance understanding complex spatial problems. suggested approach provides an reference construction soil maps cereals N’Goussa at Ouargla. Farming factors, such slope, characteristics, electrical road networks, occupation, were integrated into map by using system. Multiplying weighted coefficients linked these factors allows global map. obtained results allow prioritization sites four classes: high suitability, moderate low unsuitability. In fact, 60.06% total area moderately suitable cereals.

Language: Английский

---

Examination of spatio-temporal urbanization patterns in Islamabad Metropolis, Pakistan, over past four decades: a remote sensing–based approach

Arabian Journal of Geosciences, Journal Year: 2023, Volume and Issue: 16(1)

Published: Jan. 1, 2023

Language: Английский

---