Redécouverte et Écologie d´Onopordum algeriense (Munby) Pomel = Carduus algeriensis Munby, endémique stricte en voie d’extinction du secteur algérois

Selma Amina; Teresa Calvão; Sahraoui

doi:10.24310/abm.v45i.5805

Authors

Selma Amina Laboratoire d'Ecologie végétale, Faculté des Sciences Biologiques, Université des Sciences et de la Technologie Houari Boumediène, BP 32 EL ALIA ALGER 16 111 ALGERIE. Algeria
Teresa Calvão Department of Sciences and Environmental Engineering, NOVA School of Science and Technology, NOVA University Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal Center for Environmental and Sustainability Research (CENSE), NOVA School of Science and Technology, NOVA University Lisbon, Campus de Caparica 2829-516 Caparica, Portugal Portugal
Sahraoui Laboratoire d'Ecologie végétale, Faculté des Sciences Biologiques, Université des Sciences et de la Technologie Houari Boumediène, BP 32 EL ALIA ALGER 16 111 ALGERIE. Algeria

DOI:

https://doi.org/10.24310/abm.v45i.5805

Keywords:

Carduus algeriensis, Onopordon algeriense, endémisme, rare, extinction, Algérie, Afrique

Abstract

Onopordum algeriense is a strict endemic species of the Algerian sector, limited more precisely to the hills and mountains of the Puits des Zouaves (Baïnem Forest). Given its very restricted distribution its conservation is essential. It is indeed strictly protected in Algeria by Executive Decree.
The objective of this paper is to assess the population size and conservation status of Onopordum algeriense according to IUCN criteria as well as its vulnerability. Exhaustive sampling by the quadrat method was carried out in two sites in the Baïnem forest.
In order to study the spatial distribution of the species, the method of Thiessen Polygons and Moran Index followed by a canonical correlation analysis was applied to elucidate the relationship between the environment variables and the spatial distribution of the species. The results revealed a trend towards aggregation.
The population has a reduce size (1648 feet by 320 m2). Onopordum algeriense seems to be disturbed by the presence of wild boar and probably also by the presence of a beetle (the evil ketone). The particular conditions of its natural habitat do not seem indispensable to its survival but the absence of competitors in this habitat will, no doubt, represent a strong advantage. According to the adopted IUCN criteria, the species is Critically Endangered. If there is not conservation effort the future of the species seems uncertain also because of the pressure for urbanization in this area.

Downloads

Metrics

PDF views

270

| |

Author Biographies

Selma Amina, Laboratoire d'Ecologie végétale, Faculté des Sciences Biologiques, Université des Sciences et de la Technologie Houari Boumediène, BP 32 EL ALIA ALGER 16 111 ALGERIE.

City smail yefsah 2068 logts Building 32A N ° 6, BAB EZZOUAR, ALGIERS, ALGERIA.

Teresa Calvão, Department of Sciences and Environmental Engineering, NOVA School of Science and Technology, NOVA University Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal Center for Environmental and Sustainability Research (CENSE), NOVA School of Science and Technology, NOVA University Lisbon, Campus de Caparica 2829-516 Caparica, Portugal

Assistant Professor at Universidade Nova de Lisboa (NOVA University), School of Science and Technology (FCT NOVA) for more than 30 years. She holds a BSc in Environmental Engineering (1982) and a Ph. D. in Environmental Sciences, Natural Systems, in FCT/UNL (2000).

Sahraoui, Laboratoire d'Ecologie végétale, Faculté des Sciences Biologiques, Université des Sciences et de la Technologie Houari Boumediène, BP 32 EL ALIA ALGER 16 111 ALGERIE.

Maitre Assistant de Classe A

References

Baumel, A., Affre L., Véla E., Auda P., Torre F., Youssef S., Tatoni T. (2009). Ecological magni-tude and fine scale dynamics of the Mediterranean narrow endemic therophyte, Arenaria provincialis (Caryophyllaceae). Acta Botanica Gallica 156: 259-272.

Faurel, L., (1959). Plantes rares et menacées d’Algérie. C. R. de la réunion technique de l’UICN, 5, 140-155. Athènes.

Fortin, M. J., Dale, M. R. T. (2005). Spatial analysis: A guide for ecologists. Cambridge Univ. Press, 365 p. ISL-BRGM (2006) . Etude de réduction de la vulnérabilité du massif de Bouzaréah aux catas-trophes naturelles. Rapport de tâche 2, volume 2, R3114, 6-42.

IUCN (2018). Guide pratique pour la re?alisation de Listes rouges re?gionales des espe ces menace?es - Me?thodologie de l’UICN & de?marche d’e?labora-tion. Seconde édition. Paris, France.

Médail, F., Myers, N. (2004). Mediterranean Basin, in: R.A. Mittermeier, P. Robles Gil, M. Hoffmann, J. Pilgrim, T. Brooks, C.G. Mitter-meier, J. Lamoreux, G.A.B. da Fonseca (Eds.), Hotspots revisi-ted: Earth’s Biologically Richest and Most Endangered Terres-trial Ecoregions, CEMEX, Conservation International & Agru-pación Sierra Madre, Monte-rrey, Washington, Mexico, 144–147

Petit, R. J., Aguinagalde, I., Beaulieu de, J-L., Bittkau, C., Brewer, S., Cheddadi, R., Ennos, R., Fineschi, S., Grivet, D., Lascoux, M., Mohanty, A., Mu?ller-Starck ,G., Demesure-Musch, B., Palmé, A., Martin, J. P., Rendell, S. & Vendramin, G. G. (2003). Glacial refugia: hot spots but not melting pots of genetic diversity, Science, 300, 1563-1565.

Quézel, P. & Médail, F. (2003). Écologie et biogéogra-phie des forêts du Bassin méditerranéen, Elsevier, Paris. 573 pp.

Véla, E., Auda, P., Léger, J. F., Gonçalves, V., Baumel, A. (2008). Exemple d’une nouvelle évaluation du statut de menace suivant les critères de l’UICN version 3.1.: le cas de l’endémique proven-çale Arenaria provincialis Chater & Halliday (= Gouffeia arenarioides DC., Caryophyllaceae). Acta Botanica Gallica 155: 547-562.

Vela, E. & Benhouhou, S. (2007). Évaluation d’un nouveau point chaud de biodiversité végétale dans le Bassin méditerranéen (Afrique du Nord). Comptes-Rendus Biologies, 330, 589-605.

Youssef, S., Baumel, A., Véla, E., Juin, M., Dumas, E., Affre, L., Tatoni, T. (2011). Factors underlying the narrow distribution of the Mediterranean annual plant Arenaria provincialis (Caryophy-llaceae). Folia Geobotanica published online 25 Mai 2011.

Zuur, A. F., Ieno, E.N., Smith, G.M., (2007). Analysing ecological data. Springer, New York. 672p