Résultat de la recherche
2 recherche sur le mot-clé 'Cedrus atlantica'
Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette recherche
Effects of Cedrus atlantica and Pinus halepensis on the chemistry and fertility of a Mediterranean soil after 40 years / F. Pinzari in Canadian journal of soil science, 81 (5) (November 2001)
[article]
Titre : Effects of Cedrus atlantica and Pinus halepensis on the chemistry and fertility of a Mediterranean soil after 40 years Type de document : Imprimé Auteurs : F. Pinzari ; M. T. Dell’Abate ; A. Benedetti ; C. Dazzi Année de publication : 2001 Article en page(s) : 553-560 Catégories : [CBNPMP-Thèmes] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Cedrus atlantica Pinus halepensis Résumé : In this study, a comparison between Pinus halepensis Miller and Cedrus atlantica (Endl) Carrière in reforested sites was carried out. Our major objectives were to study soil organic matter in the two stands to determine whether significant biochemical modifications of the C cycle occurred since stand establishment, and to evaluate the effect of the two tree species on soil formation.The study area is part of the Sicani range (western Sicily, Italy), and is characterised by homogeneous environmental features (topography, geology, slope, exposition, climate, etc.). Ten profiles were sampled in a plantation of Pinus halepensisand one of Cedrus atlanticafor each stand. Microbial biomass activity (qCO2, and Cmic:Corg), organic C contents, and organic C mineralization rates were compared between the Ah and Bw horizons of the soils in the two stands. The microbial biomass activity in A-horizons differed appreciably. The metabolic quotient was higher under Pinushalepensis while the Cmic to Corg ratio was higher under Cedrus atlantica, which indicated a possible stressed condition for soil microbial biomass in the Pinus halepensisstand The turnover of decomposable C did not differ significantly between the two soils, but the A-horizons of the Cedrus atlantica site appeared poorer in total organic C content. Lien pérenne : DOI : 10.4141/S00-030 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152895
in Canadian journal of soil science > 81 (5) (November 2001) . - 553-560Pinzari, F., Dell’Abate, MT., Benedetti, A., Dazzi, C. 2001. Effects of Cedrus atlantica and Pinus halepensis on the chemistry and fertility of a Mediterranean soil after 40 years. Canadian journal of soil science, 81(5): 553-560.Documents numériques
Consultable
Article (2001)URL Impact of droughts on Cedrus atlantica forests dieback in the Aurès (Algeria) / Dalila Kherchouche in Journal of life sciences, 6 (2012)
[article]
Titre : Impact of droughts on Cedrus atlantica forests dieback in the Aurès (Algeria) Type de document : Imprimé Auteurs : Dalila Kherchouche ; Mahdi Kalla ; Emilia M. Gutiérrez ; Said Attalah ; Madjid Bouzghaia Année de publication : 2012 Article en page(s) : 1262-1269 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Cedrus atlantica Résumé : Cedar forests area in northeastern Algeria (Aurès) is decreasing by the massive tree mortality. In some localities more than 95% of the trees have recently died (e.g. Boumerzoug in Belezma National Park). Three reported episodes of massive tree mortality in 1880, 1980, and 2000 were attributed to drought at least as the triggering factor. Our main objective was to reconstruct drought events that could be linked to Atlas cedar tree mortality using tree-ring series. We developed a Cedrus atlantica tree-ring width chronology in Chelia with a reliable period spanning from 1502 to 2008. Based on the relationship between chronology indices and instrumental precipitation data, we reconstructed total October-June precipitation. Dry events were identified using a threshold of 90% of the October-June mean instrumental precipitation. The unique drought event of 3-year period (1877-1879) could explain the tree mortality occurred in 1880. In terms of severity and frequency of droughts, the later half of the twentieth century seems to be the worst and may be responsible for the recent tree mortality. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152907
in Journal of life sciences > 6 (2012) . - 1262-1269Kherchouche, D., Kalla, M., Gutiérrez, EM., Attalah, S., Bouzghaia, M. 2012. Impact of droughts on Cedrus atlantica forests dieback in the Aurès (Algeria). Journal of life sciences, 6: 1262-1269.