Impact de l'entomofaune sur la pinède à Pinus Halepensis Mill en dépérissement à Méchéria (wilaya de Naâma, Algérie)
This study presents the entomofauna found in the Aleppo pine forest of Draa El Aoud, in the commune of Méchéria (southwestern Algeria). Planted in 1975 over an area of 1,000 ha, this pine forest has suffered a sharp decline, having completely disappeared from 28 of the 50 plots where it was original...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Physio-Géo
2024-03-01
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| Series: | Physio-Géo |
| Subjects: | |
| Online Access: | https://journals.openedition.org/physio-geo/16412 |
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| Summary: | This study presents the entomofauna found in the Aleppo pine forest of Draa El Aoud, in the commune of Méchéria (southwestern Algeria). Planted in 1975 over an area of 1,000 ha, this pine forest has suffered a sharp decline, having completely disappeared from 28 of the 50 plots where it was originally planted. Another 18 plots are at an advanced stage of decline. In 2018-2019, bark beetles sampling was conducted on 65 living but severely affected trees spread across the declining plots. Dendrometric measurements (height and diameter), an insect inventory and a count of bark beetles holes at 1.30 m above ground level were carried out. Analysis of the results showed no relationship between the number of bark beetles holes and tree height or diameter. Five pests belonging to four families were identified: - Thaumetopoea pityocampa (Denis et Schiffermuller, 1775), the pine processionary, - three xylophages: Orthotomicus erosus W., Orthotomicus proximus E. and Colydium elongatum (Fabricius, 1787) - finally, Arhopalus ferus (Mulsant, 1839), a known saproxylophage species with pyrophilic tendencies. The discovery of Arhopalus ferus in the region is a first. It has also been found to attack living wood. The action of these pests, which comes on top of the effects of a difficult environment, in particular its semi-arid climate, is helping to endanger the survival of the pine forest.Translated with DeepL.com (free version) |
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| ISSN: | 1958-573X |