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Auteur Leila Sahli |
Documents disponibles écrits par cet auteur (4)
Affiner la recherche Interroger des sources externesEtude du comportement de quelques espèces floristiques et faunistiques des écosystèmes aquatiques vis-à-vis des éléments traces métalliques par des bioessais / Leila Sahli
Titre : Etude du comportement de quelques espèces floristiques et faunistiques des écosystèmes aquatiques vis-à-vis des éléments traces métalliques par des bioessais Type de document : texte imprimé Auteurs : Leila Sahli, Auteur ; Smail Mehennaoui, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2012 Importance : 235 f. Format : 31 cm. Note générale : Doctorat en Sciences
2 copies imprimées disponiblesLangues : Français (fre) Catégories : Français - Anglais
BiologieTags : Eau, Sédiment Eau interstitielle Eléments Traces Métalliques Daphnia magna Aliivibrio fischeri Pseudokirchneriella subcapitata bassin versant Kebir Rhumel Index. décimale : 570 Sciences de la vie. Biologie Diplôme : Doctorat en sciences En ligne : ../theses/biologie/SAH6278.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6243 Etude du comportement de quelques espèces floristiques et faunistiques des écosystèmes aquatiques vis-à-vis des éléments traces métalliques par des bioessais [texte imprimé] / Leila Sahli, Auteur ; Smail Mehennaoui, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2012 . - 235 f. ; 31 cm.
Doctorat en Sciences
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Eau, Sédiment Eau interstitielle Eléments Traces Métalliques Daphnia magna Aliivibrio fischeri Pseudokirchneriella subcapitata bassin versant Kebir Rhumel Index. décimale : 570 Sciences de la vie. Biologie Diplôme : Doctorat en sciences En ligne : ../theses/biologie/SAH6278.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6243 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité SAH/6278 SAH/6278 Thèse Bibliothèque principale Thèses Disponible
Titre : Évaluation du risque de contamination des sédiments de l'oued Boumerzoug par les éléments traces métalliques sur la faune macroinvertébrée benthique et via la pertinence des bioindicateurs Spinacia oleracea (L.) et Physa acuta (D.) Type de document : texte imprimé Auteurs : Dounia Keddari, Auteur ; Fatima Zohra Afri-Mehennaoui, Directeur de thèse ; Leila Sahli, Directeur de thèse Mention d'édition : 08/03/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 283 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale: Ecologie et Environnement Éléments Traces Métalliques Sédiment Contamination Biomonitoring Spinacia oleracea Physa acuta Faune macroinvertebrée benthique Oued Boumerzoug Trace metals Sediment التلوث الرواسب المعادن الثقيلة وادي بو مرزوق Index. décimale : 570 Sciences de la vie. Biologie Résumé : Our study is part of the deepening of our knowledge of a lotic ecosystem, the Boumerzeug wadi and its tributaries, which has been the subject of various complementary approaches to characterize its physico-chemical and biological quality The objective of this work is to assess the level of contamination of contamination of the abiotic and biotic compartments of the ecosystem by trace metals (TM) whose anthropogenic origin is added to the natural background levels. The samples were collected from 20 sites on five occasions spread over 15 months. Among the elements determined, some are essential to the physiological functions of organisms such as Cu, Cr, Ni, Ni, Zn, others are toxic such as Cd and Pb and finally Mn is a natural element without consequences on living beings. The TM measured in surface sediments follow the following sequence: MnZn > > Cu > Pb Ni>Co> Cd. The study of benthic macroinvertebrate fauna compartments highlights a faunal impoverishment following the disappearance of species sensitive to organic and/or metallic pollution, the method does not allow the nature of stress to be identified. The hydrobiological quality of the watercourse, expressed by the biotic index, reflects a situation of significant disturbance illustrated by the drop in values from upstream to downstream. The transfers of TM to the different parts, roots, leaves of Spinacia oleracea revealed that the chenopodiaceae concentrates and sequesters in its roots all TM except zinc, which has a higher content in the leaves. Thus, the roots seem to constitute a barrier that reduces the transfer of metal elements to the aerial part, while zinc, an essential metal, is translocated to the leaves. The hierarchy of average TM contents in spinach is as follows: Zn > Mn > Cu > Pb > Cr > Ni> Co>Cd. The transfer of TM to Physa or Physelle acuta lung gastropods in the various specimens, soft tissues and shells of P. acuta adults/juveniles) reflects the bioavailability of the element. The spatio-temporal data of TM contents in Physa acuta record the following order of abundance: MnZn > Cr> Cu > Ni>Pb > Co > Cd. All detected heavy metal concentrations were higher in soft tissue than in shell for adults and juveniles. There was a significant effect of the age (p < 0,001) on the concentrations of the eight metals, the adults of P. acut showing higher concentrations than juvenile. The biota-sediment accumulation factor (BSAF) of Cd in soft tissue was higher than 1, hence the usage of this species as a bio indicator for Cd pollution The present study provides data and information on the concentrations of 8 TM (Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn) in the sediments of the Boumerzoug wadi and its tributaries and their transfer to plant and animal. It will provide a database and knowledge base that could provide new information for any future biomonitoring study of freshwater aquatic ecosystems.
Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/biologie/KED7637.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11471 Évaluation du risque de contamination des sédiments de l'oued Boumerzoug par les éléments traces métalliques sur la faune macroinvertébrée benthique et via la pertinence des bioindicateurs Spinacia oleracea (L.) et Physa acuta (D.) [texte imprimé] / Dounia Keddari, Auteur ; Fatima Zohra Afri-Mehennaoui, Directeur de thèse ; Leila Sahli, Directeur de thèse . - 08/03/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 283 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale: Ecologie et Environnement Éléments Traces Métalliques Sédiment Contamination Biomonitoring Spinacia oleracea Physa acuta Faune macroinvertebrée benthique Oued Boumerzoug Trace metals Sediment التلوث الرواسب المعادن الثقيلة وادي بو مرزوق Index. décimale : 570 Sciences de la vie. Biologie Résumé : Our study is part of the deepening of our knowledge of a lotic ecosystem, the Boumerzeug wadi and its tributaries, which has been the subject of various complementary approaches to characterize its physico-chemical and biological quality The objective of this work is to assess the level of contamination of contamination of the abiotic and biotic compartments of the ecosystem by trace metals (TM) whose anthropogenic origin is added to the natural background levels. The samples were collected from 20 sites on five occasions spread over 15 months. Among the elements determined, some are essential to the physiological functions of organisms such as Cu, Cr, Ni, Ni, Zn, others are toxic such as Cd and Pb and finally Mn is a natural element without consequences on living beings. The TM measured in surface sediments follow the following sequence: MnZn > > Cu > Pb Ni>Co> Cd. The study of benthic macroinvertebrate fauna compartments highlights a faunal impoverishment following the disappearance of species sensitive to organic and/or metallic pollution, the method does not allow the nature of stress to be identified. The hydrobiological quality of the watercourse, expressed by the biotic index, reflects a situation of significant disturbance illustrated by the drop in values from upstream to downstream. The transfers of TM to the different parts, roots, leaves of Spinacia oleracea revealed that the chenopodiaceae concentrates and sequesters in its roots all TM except zinc, which has a higher content in the leaves. Thus, the roots seem to constitute a barrier that reduces the transfer of metal elements to the aerial part, while zinc, an essential metal, is translocated to the leaves. The hierarchy of average TM contents in spinach is as follows: Zn > Mn > Cu > Pb > Cr > Ni> Co>Cd. The transfer of TM to Physa or Physelle acuta lung gastropods in the various specimens, soft tissues and shells of P. acuta adults/juveniles) reflects the bioavailability of the element. The spatio-temporal data of TM contents in Physa acuta record the following order of abundance: MnZn > Cr> Cu > Ni>Pb > Co > Cd. All detected heavy metal concentrations were higher in soft tissue than in shell for adults and juveniles. There was a significant effect of the age (p < 0,001) on the concentrations of the eight metals, the adults of P. acut showing higher concentrations than juvenile. The biota-sediment accumulation factor (BSAF) of Cd in soft tissue was higher than 1, hence the usage of this species as a bio indicator for Cd pollution The present study provides data and information on the concentrations of 8 TM (Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn) in the sediments of the Boumerzoug wadi and its tributaries and their transfer to plant and animal. It will provide a database and knowledge base that could provide new information for any future biomonitoring study of freshwater aquatic ecosystems.
Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/biologie/KED7637.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11471 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KED/7637 KED/7637 Thèse Bibliothèque principale Thèses Disponible
Titre : Utilisation des arbres et des sols des bords de routes comme indicateurs de la pollution métallique : approches physico-chimique, biochimique et écotoxicologique. Type de document : texte imprimé Auteurs : Hana Alatou, Auteur ; Leila Sahli, Directeur de thèse Mention d'édition : 16/02/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 295 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale: Ecologie et Environnement Sol arbres Eléments Traces Métalliques marqueurs biochimiques Constantine Soil trees Metallic Trace Elements biochemical markers التربة الاشجار معادن ثقيلة علامات بيو كيميائية قسنطينة Index. décimale : 570 Sciences de la vie. Biologie Résumé :
The assessment of pollution intensity, through passive biomonitoring processes is a very efficient nvironmental technique used for several decades. Indeed, the use of organisms makes it possible to overcome encountered the difficulties during direct physico-chemical measurements, which are often very complex and expensive. In the region of Constantine, it is easy to see that we have a real pollution problem, on the one hand because of the existence of a large car fleet compared to the distances traveled and on the other hand certain climatic and topographical characteristics which create a favorable climate to the development of pollution. In this context, this study focused on the use interest of soils and trees (leaves and bark) as metal pollution indicators in urban areas. The concerned area is the national road N ° 03 linking the Constantine city center to Hamma Bouziane commune, in addition to a control zone which is remoted from any anthropogenic disturbance source (Arboretum of Draa Naga). In order to understand the objectives, three main axes were developed, namely: a pseudo-total and sequential contents quantification in metallic trace elements (HMS) in soils (0-20 cm and 20-40 cm), an abiotic or metallic stress evaluation via the assay of biochemical and HMS markers in 12 ligneous species leaves and bark that found, and also, the lead ecotoxicity assessment in some species via ecotoxicity tests. Our investigations related to the contamination level assessment by HMS were: cadmium (Cd), copper (Cu), manganese (Mn), lead (Pb) and zinc (Zn). Pseudo-total contents in HMS soils in both profiles record the following abundance order : Mn > Pb > Zn > Cu > Cd. Otherwise, the sequential contents study in soils allowed us to evaluate the HMS distribution in the different fractions and thus to highlight the anthropic contribution. Regarding to the revealing markers results of abiotic stress, it appears that the urban area trees have low chlorophyll levels, and high proline and soluble sugars levels compared to those in the control zone. The HMS quantification in leaves and bark recorded the following order of abundance: Mn > Zn > Pb > Cu > Cd. Trees turned out to be good metallic air pollution. The bioconcentration factor and the metal accumulation index confirmed the usefulness and effectiveness of these species in bioindication and / or phytoremediation For the ecotoxicity tests, the concentration that inhibits the 50% of seeds germination is 64.97 μg.L-1 for C. sempervirens and 110.43 μg.L-1 for P. halepensis. Lead seems to have a much greater toxic effect on seed germination of C. sempervirens than on P. halepensis.Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/biologie/ALA7613.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11449 Utilisation des arbres et des sols des bords de routes comme indicateurs de la pollution métallique : approches physico-chimique, biochimique et écotoxicologique. [texte imprimé] / Hana Alatou, Auteur ; Leila Sahli, Directeur de thèse . - 16/02/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 295 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale: Ecologie et Environnement Sol arbres Eléments Traces Métalliques marqueurs biochimiques Constantine Soil trees Metallic Trace Elements biochemical markers التربة الاشجار معادن ثقيلة علامات بيو كيميائية قسنطينة Index. décimale : 570 Sciences de la vie. Biologie Résumé :
The assessment of pollution intensity, through passive biomonitoring processes is a very efficient nvironmental technique used for several decades. Indeed, the use of organisms makes it possible to overcome encountered the difficulties during direct physico-chemical measurements, which are often very complex and expensive. In the region of Constantine, it is easy to see that we have a real pollution problem, on the one hand because of the existence of a large car fleet compared to the distances traveled and on the other hand certain climatic and topographical characteristics which create a favorable climate to the development of pollution. In this context, this study focused on the use interest of soils and trees (leaves and bark) as metal pollution indicators in urban areas. The concerned area is the national road N ° 03 linking the Constantine city center to Hamma Bouziane commune, in addition to a control zone which is remoted from any anthropogenic disturbance source (Arboretum of Draa Naga). In order to understand the objectives, three main axes were developed, namely: a pseudo-total and sequential contents quantification in metallic trace elements (HMS) in soils (0-20 cm and 20-40 cm), an abiotic or metallic stress evaluation via the assay of biochemical and HMS markers in 12 ligneous species leaves and bark that found, and also, the lead ecotoxicity assessment in some species via ecotoxicity tests. Our investigations related to the contamination level assessment by HMS were: cadmium (Cd), copper (Cu), manganese (Mn), lead (Pb) and zinc (Zn). Pseudo-total contents in HMS soils in both profiles record the following abundance order : Mn > Pb > Zn > Cu > Cd. Otherwise, the sequential contents study in soils allowed us to evaluate the HMS distribution in the different fractions and thus to highlight the anthropic contribution. Regarding to the revealing markers results of abiotic stress, it appears that the urban area trees have low chlorophyll levels, and high proline and soluble sugars levels compared to those in the control zone. The HMS quantification in leaves and bark recorded the following order of abundance: Mn > Zn > Pb > Cu > Cd. Trees turned out to be good metallic air pollution. The bioconcentration factor and the metal accumulation index confirmed the usefulness and effectiveness of these species in bioindication and / or phytoremediation For the ecotoxicity tests, the concentration that inhibits the 50% of seeds germination is 64.97 μg.L-1 for C. sempervirens and 110.43 μg.L-1 for P. halepensis. Lead seems to have a much greater toxic effect on seed germination of C. sempervirens than on P. halepensis.Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/biologie/ALA7613.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11449 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ALA/7613 ALA/7613 Thèse Bibliothèque principale Thèses Disponible
Titre : Utilisation intégrée des escargots pour la surveillance de la contamination métallique des sols : approches chimique, biologique et écotoxicologique. Type de document : texte imprimé Auteurs : Hadjer Belhiouani ép Seghir, Auteur ; Leila Sahli, Directeur de thèse ; Fatima Zohra Afri-Mehennaoui, Directeur de thèse Mention d'édition : 17/12/2019 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2019 Importance : 279 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale: Ecologie et Environnement Gastéropodes pulmonés Biodiversité Éléments Trace Métalliques Sol Cornu aspersum Drimia maritima Bioessais Terrestrial Pulmonate Gastropods Biodiversity Metallic Trace Elements Soil Bioassay المعادن الضئيلة الكمية اختبارات حيوية التنوع البيولوجي القشريات الأرضية Index. décimale : 570 Sciences de la vie. Biologie Résumé :
During the last century, Algeria experienced a period of rapid demographic, industrial, and agricultural expansion involving the irrational exploitation of many of its natural resources, and thus causing soil contamination and dysfunction. Among these contaminants that affect the soil: metallic trace elements, which are, ubiquitous, persistent in the environment, and extremely toxic at high levels. In order to monitor the metallic contamination of soils, and to assess their quality, this study is led. It consists of a mixed approach using terrestrial pulmonate gastropods, i.e., snails for bioindication purposes. Thus, five zones located in North-East Algeria, and characterized by relatively important anthropic activities (urban, industrial, mining, sub-mountainous and mountainous zones) are investigated. The studied TEs are Cd, Cr, Cu, Pb and Zn. The bioindicator snail studied is Cornu aspersum, and the studied vegetation is Drimia maritima. Firstly, the biodiversity and density of terrestrial gastropods are studied in these areas. We reported 3269 individuals, belonging to 19 species harvested during the spring and summer seasons. The density is more important in spring and the diversity is higher in summer. Then, the typology and the contents of TEs in the soils (pseudo-total and bioavailable fractions) is investigated. TEs are also quantified in the vegetation and, in the various parts of the snail C. apsersum (feet, viscera and shells). The mean TES concentrations of studied soils are: 3,04 µg.g-1 for Cd, 56,65 µg.g-1 for Cr, 30,87 µg.g-1 for Cu, 185,03 µg.g-1 for Pb and, 312,90 µg.g-1 for Zn. The most affected areas being the mining, industrial and urban areas. Single and integrated metal contamination indexes: Igeo, Cf, EF, Cd, PLI, and PERI confirm the soil contamination, especially with Cd, Pb and Zn. Mostly; the concentrations of TEs in snails were higher in the viscera than in the feet or the shells. Vegetation TEs concentrations did not generally exceed regulatory backgrounds. Bioconcentration factors calculated for C. aspersum confirm the importance of the digestive tract in the gastropod contamination process. Finally, the bioassays carried out under controlled conditions and implying the contamination of the substrate and the food with Pb on the juveniles of the species C. aspersum, show that there is a dose-response relation, which conditions the weight growth, but growth in diameter is not affected.
Note de contenu :
Annexes.Diplôme : Doctorat En ligne : ../theses/biologie/BEL7606.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11442 Utilisation intégrée des escargots pour la surveillance de la contamination métallique des sols : approches chimique, biologique et écotoxicologique. [texte imprimé] / Hadjer Belhiouani ép Seghir, Auteur ; Leila Sahli, Directeur de thèse ; Fatima Zohra Afri-Mehennaoui, Directeur de thèse . - 17/12/2019 . - جامعة الإخوة منتوري قسنطينة, 2019 . - 279 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale: Ecologie et Environnement Gastéropodes pulmonés Biodiversité Éléments Trace Métalliques Sol Cornu aspersum Drimia maritima Bioessais Terrestrial Pulmonate Gastropods Biodiversity Metallic Trace Elements Soil Bioassay المعادن الضئيلة الكمية اختبارات حيوية التنوع البيولوجي القشريات الأرضية Index. décimale : 570 Sciences de la vie. Biologie Résumé :
During the last century, Algeria experienced a period of rapid demographic, industrial, and agricultural expansion involving the irrational exploitation of many of its natural resources, and thus causing soil contamination and dysfunction. Among these contaminants that affect the soil: metallic trace elements, which are, ubiquitous, persistent in the environment, and extremely toxic at high levels. In order to monitor the metallic contamination of soils, and to assess their quality, this study is led. It consists of a mixed approach using terrestrial pulmonate gastropods, i.e., snails for bioindication purposes. Thus, five zones located in North-East Algeria, and characterized by relatively important anthropic activities (urban, industrial, mining, sub-mountainous and mountainous zones) are investigated. The studied TEs are Cd, Cr, Cu, Pb and Zn. The bioindicator snail studied is Cornu aspersum, and the studied vegetation is Drimia maritima. Firstly, the biodiversity and density of terrestrial gastropods are studied in these areas. We reported 3269 individuals, belonging to 19 species harvested during the spring and summer seasons. The density is more important in spring and the diversity is higher in summer. Then, the typology and the contents of TEs in the soils (pseudo-total and bioavailable fractions) is investigated. TEs are also quantified in the vegetation and, in the various parts of the snail C. apsersum (feet, viscera and shells). The mean TES concentrations of studied soils are: 3,04 µg.g-1 for Cd, 56,65 µg.g-1 for Cr, 30,87 µg.g-1 for Cu, 185,03 µg.g-1 for Pb and, 312,90 µg.g-1 for Zn. The most affected areas being the mining, industrial and urban areas. Single and integrated metal contamination indexes: Igeo, Cf, EF, Cd, PLI, and PERI confirm the soil contamination, especially with Cd, Pb and Zn. Mostly; the concentrations of TEs in snails were higher in the viscera than in the feet or the shells. Vegetation TEs concentrations did not generally exceed regulatory backgrounds. Bioconcentration factors calculated for C. aspersum confirm the importance of the digestive tract in the gastropod contamination process. Finally, the bioassays carried out under controlled conditions and implying the contamination of the substrate and the food with Pb on the juveniles of the species C. aspersum, show that there is a dose-response relation, which conditions the weight growth, but growth in diameter is not affected.
Note de contenu :
Annexes.Diplôme : Doctorat En ligne : ../theses/biologie/BEL7606.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11442 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEL/7606 BEL/7606 Thèse Bibliothèque principale Thèses Disponible
