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

Selma Amina Djelid; Teresa Calvão; Sahraoui Bensaid

doi:10.24310/abm.v45i.5805

Authors

Selma Amina Algeria
Teresa Calvão Portugal
Sahraoui 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.

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Author Biographies

Selma Amina

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

Teresa Calvão

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

Maitre Assistant de Classe A

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