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Partager le résultat de cette recherche Interroger des sources externesCauses et conséquences des feux de forêts sur la production du liège dans les subéraies du Nord-Est algérien / Imane Bouregbi
Titre : Causes et conséquences des feux de forêts sur la production du liège dans les subéraies du Nord-Est algérien : Essai de valorisation et réhabilitation Type de document : texte imprimé Auteurs : Imane Bouregbi, Auteur ; Mohamed El-Habib Benderredji,, Auteur Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 183 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Incendie forêt chêne liège liège massifs subéraies restauration sauvegarde fire forest Cork oak cork mountains Cork oak forests restoration safeguard الحرائق الغابات البلوط الفلیني الفلین غابات البلوط الفلیني استرجاع حمایة Index. décimale : 570 Sciences de la vie. Biologie Résumé : The assessment of forest fires (1975-2013) established in the mountains of Eastern Algeria, shows that the cork oak remains the essence most affected compared to other species, with a burned area of 126,412.88 ha (48%). This region is highly affected by wildfires since recorded a cumulative 18,732 fires, degrading a total forest area of 635,471.55 hectares.
The causes attributed to the outbreak of fires are divers . But it seems that the climate factor
is the root cause of all disasters. The floristic forest also has a great influence on the development of fire. While 70% of registered claims originate from the human factor.
Analysis of the impact of forest fires shows that there is a strong negative correlation between the production of cork, the starting number of fires and the area burned.
Examining the evolution of the cork oak survival after passage of fire revealed as snuff into account in forest Collo observations stations, the rate of tree mortality is based on their age so démasclage bark cork.
On the other hand during the recovery of our parcels covered by the fires was addressing the themes of economic type and forest type and the choice of intervention was so as to seek the restoration of the tree layer using crop sizes performed immediately after the passage of the fire, with priority to the cork forests and future productions.
Diplôme : Magistère En ligne : ../theses/biologie/BOU6648.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9800 Causes et conséquences des feux de forêts sur la production du liège dans les subéraies du Nord-Est algérien : Essai de valorisation et réhabilitation [texte imprimé] / Imane Bouregbi, Auteur ; Mohamed El-Habib Benderredji,, Auteur . - constantine [Algérie] : Université Constantine 1, 2014 . - 183 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Incendie forêt chêne liège liège massifs subéraies restauration sauvegarde fire forest Cork oak cork mountains Cork oak forests restoration safeguard الحرائق الغابات البلوط الفلیني الفلین غابات البلوط الفلیني استرجاع حمایة Index. décimale : 570 Sciences de la vie. Biologie Résumé : The assessment of forest fires (1975-2013) established in the mountains of Eastern Algeria, shows that the cork oak remains the essence most affected compared to other species, with a burned area of 126,412.88 ha (48%). This region is highly affected by wildfires since recorded a cumulative 18,732 fires, degrading a total forest area of 635,471.55 hectares.
The causes attributed to the outbreak of fires are divers . But it seems that the climate factor
is the root cause of all disasters. The floristic forest also has a great influence on the development of fire. While 70% of registered claims originate from the human factor.
Analysis of the impact of forest fires shows that there is a strong negative correlation between the production of cork, the starting number of fires and the area burned.
Examining the evolution of the cork oak survival after passage of fire revealed as snuff into account in forest Collo observations stations, the rate of tree mortality is based on their age so démasclage bark cork.
On the other hand during the recovery of our parcels covered by the fires was addressing the themes of economic type and forest type and the choice of intervention was so as to seek the restoration of the tree layer using crop sizes performed immediately after the passage of the fire, with priority to the cork forests and future productions.
Diplôme : Magistère En ligne : ../theses/biologie/BOU6648.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9800 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/6648 BOU/6648 Thèse Bibliothèque principale Thèses Disponible
Titre : Les modifications climatiques et les feux de forets causes,conséquences et évaluation : Cas du Tell Constantinois Wilayas de (Jijel , Skikda , Constantine et Mila) Type de document : texte imprimé Auteurs : Zakia Gouachi, Auteur ; Hafiza Tatar (Née Boulkhedid), Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 189 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Aménagement du TerritoireTags : Amenagements urbain et environnement Tell constantinos changements climatiques feux de foret formations végétales essences forestières climat températures précipitations sécheresse estivale déficit hydrique foret maquis broussailles Skikda Jijel constantine Mila
التل القسنطيني التغيرات المناخية حرائق الغابات التكوينات النباتية التكوينات الغابية المناخ الحرارة الأمطار الجفاف الموسمي العجز المائي الغابة الأدغال الأحراش سكيكدة جيجل قسنطينة ميلةIndex. décimale : 711 (Aménagement du territoire) Résumé : Characterized by an arid and semi-arid climate, Algeria is more likely to feel the effects of climate changes, which can cause extreme events and natural risks such as forest fires, which are at the top of the list identified by the UN, especially in the Mediterranean regions.
The hills of Constantine which is a part of northern Algeria, where physical and human conditions (type of vegetation, climate, relief ...) are combined to favour this scourge.
With the climate changes observed in recent decades, the forest fires have increased and are seriously threatening the forest ecosystems.
An analysis of the evolution of climatic data for the previous and current period as well as the released water balance highlights in the recent decades (1980 - 2012), an increase of the temperatures and a decrease of rainfalls, which were Among other causes that have increased the frequency of forest fires.
The consequences of forest fires are apparent in the region, the transformation of landscapes is present everywhere, it allows to understand the extent of shrinkage of the forest area; the maquis, which continue to expand, express the degradation of the forest cover.
Forest fires can be minimized only through a prevention which is based on risk assessment, and is the only way to reduce the cost of damages caused during major forest fires.
Diplôme : Magistère En ligne : ../theses/amenagement/GOU6707.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9916 Les modifications climatiques et les feux de forets causes,conséquences et évaluation : Cas du Tell Constantinois Wilayas de (Jijel , Skikda , Constantine et Mila) [texte imprimé] / Zakia Gouachi, Auteur ; Hafiza Tatar (Née Boulkhedid), Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 189 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Aménagement du TerritoireTags : Amenagements urbain et environnement Tell constantinos changements climatiques feux de foret formations végétales essences forestières climat températures précipitations sécheresse estivale déficit hydrique foret maquis broussailles Skikda Jijel constantine Mila
التل القسنطيني التغيرات المناخية حرائق الغابات التكوينات النباتية التكوينات الغابية المناخ الحرارة الأمطار الجفاف الموسمي العجز المائي الغابة الأدغال الأحراش سكيكدة جيجل قسنطينة ميلةIndex. décimale : 711 (Aménagement du territoire) Résumé : Characterized by an arid and semi-arid climate, Algeria is more likely to feel the effects of climate changes, which can cause extreme events and natural risks such as forest fires, which are at the top of the list identified by the UN, especially in the Mediterranean regions.
The hills of Constantine which is a part of northern Algeria, where physical and human conditions (type of vegetation, climate, relief ...) are combined to favour this scourge.
With the climate changes observed in recent decades, the forest fires have increased and are seriously threatening the forest ecosystems.
An analysis of the evolution of climatic data for the previous and current period as well as the released water balance highlights in the recent decades (1980 - 2012), an increase of the temperatures and a decrease of rainfalls, which were Among other causes that have increased the frequency of forest fires.
The consequences of forest fires are apparent in the region, the transformation of landscapes is present everywhere, it allows to understand the extent of shrinkage of the forest area; the maquis, which continue to expand, express the degradation of the forest cover.
Forest fires can be minimized only through a prevention which is based on risk assessment, and is the only way to reduce the cost of damages caused during major forest fires.
Diplôme : Magistère En ligne : ../theses/amenagement/GOU6707.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9916 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité GOU/6707 GOU/6707 Thèse Bibliothèque principale Thèses Disponible
Titre : Cartographie de la variabilité thermique des écosystèmes forestiers de l’Est algérien. Type de document : texte imprimé Auteurs : Ahmed Laala, Auteur ; Djamel Alatou, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2016 Importance : 212 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Ecologie végétale:Ecophysiologie et biotechnologie végétale Variabilité Température Forêt NDVI SIG MODIS Est algérien Cartographie Variability Temperature Forest GIS , Eastern Algeria Cartography التغيرات الحرارة الغابة مؤشر الغطاء النباتي الخضري نظام المعلومات الجغرافي القمر الصناعي MODIS شرق الجزائر رسم الخرائط Index. décimale : 570 Sciences de la vie. Biologie Résumé : Algerian forest patrimony is estimated at 4 million hectares, including forests, Scrub and brush. This forest is exposed to natural and anthropogenic hazards that cause severe degradation resulting mainly in continued regressive evolution and a ubstantial loss of wealth. Among the natural threats is the climate conditions and particularly the temperature of the environment in which forest ecosystems evolve. In addition to its action on life processes, on growth and on phenology of species, temperature can change also the biogeographic areas of ecosystems.
In this study we analyzed the temperature to characterize the thermal environment of
eastern Algeria and the effects of its variation on the dynamics and photosynthetic activity of forest ecosystems in this vast area. The used data is the temperatures for a period of 30 consecutive years (1982-2011) and spectral index (NDVI) which can detect the photosynthetic signal above the canopy.
Statistical analysis of long temperature series reveals that the warming observed
worldwide is already noticed in eastern Algeria. The majority of the wilayas exposed to this hazard, where the trend is more pronounced for the annual maximum temperature, may reach 3 °C/30years, an increase of 0.1C°/year. Thus, the estimate of thermal field for each pixel in eastern Algeria was realized by using Geostatistical methods based on multiple regression between temperature and the explanatory variables describing the relief. From these spatial data, the thermal limits have been defined for each forest species. Finally, the technical of GIS and satellite images allowed us to monitor the dynamics of forest vegetation, and to build maps that define the relationship between forest biomass and thermal parameters. These maps helped us to
identify 901087 hectares where trees were very sensitive to changes in the average temperature, with a percentage of 53.9% of the total area of the studied forest ecosystems. Thus, the minimum temperature affects photosynthesis of forest species in an area of 852406 ha with 50.8% of the total forest area. This cartographic expression is effective, firstly for forestry in the discrimination of forest plots where the thermal factor is the limiting factor of productivity and secondly for decision makers to define the forest management strategies of country.
Diplôme : Doctorat en sciences En ligne : ../theses/biologie/LAA6983.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10412 Cartographie de la variabilité thermique des écosystèmes forestiers de l’Est algérien. [texte imprimé] / Ahmed Laala, Auteur ; Djamel Alatou, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2016 . - 212 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Ecologie végétale:Ecophysiologie et biotechnologie végétale Variabilité Température Forêt NDVI SIG MODIS Est algérien Cartographie Variability Temperature Forest GIS , Eastern Algeria Cartography التغيرات الحرارة الغابة مؤشر الغطاء النباتي الخضري نظام المعلومات الجغرافي القمر الصناعي MODIS شرق الجزائر رسم الخرائط Index. décimale : 570 Sciences de la vie. Biologie Résumé : Algerian forest patrimony is estimated at 4 million hectares, including forests, Scrub and brush. This forest is exposed to natural and anthropogenic hazards that cause severe degradation resulting mainly in continued regressive evolution and a ubstantial loss of wealth. Among the natural threats is the climate conditions and particularly the temperature of the environment in which forest ecosystems evolve. In addition to its action on life processes, on growth and on phenology of species, temperature can change also the biogeographic areas of ecosystems.
In this study we analyzed the temperature to characterize the thermal environment of
eastern Algeria and the effects of its variation on the dynamics and photosynthetic activity of forest ecosystems in this vast area. The used data is the temperatures for a period of 30 consecutive years (1982-2011) and spectral index (NDVI) which can detect the photosynthetic signal above the canopy.
Statistical analysis of long temperature series reveals that the warming observed
worldwide is already noticed in eastern Algeria. The majority of the wilayas exposed to this hazard, where the trend is more pronounced for the annual maximum temperature, may reach 3 °C/30years, an increase of 0.1C°/year. Thus, the estimate of thermal field for each pixel in eastern Algeria was realized by using Geostatistical methods based on multiple regression between temperature and the explanatory variables describing the relief. From these spatial data, the thermal limits have been defined for each forest species. Finally, the technical of GIS and satellite images allowed us to monitor the dynamics of forest vegetation, and to build maps that define the relationship between forest biomass and thermal parameters. These maps helped us to
identify 901087 hectares where trees were very sensitive to changes in the average temperature, with a percentage of 53.9% of the total area of the studied forest ecosystems. Thus, the minimum temperature affects photosynthesis of forest species in an area of 852406 ha with 50.8% of the total forest area. This cartographic expression is effective, firstly for forestry in the discrimination of forest plots where the thermal factor is the limiting factor of productivity and secondly for decision makers to define the forest management strategies of country.
Diplôme : Doctorat en sciences En ligne : ../theses/biologie/LAA6983.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10412 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité LAA/6983 LAA/6983 Thèse Bibliothèque principale Thèses Disponible
