Assessment of species diversity and state of "Stipa tenacissima" steppes

Ghiloufi, Wahida; Quero, Jose L; García Gómez, Miguel y Chaieb, Mohamed (2015). Assessment of species diversity and state of "Stipa tenacissima" steppes. "Turkish Journal of Botany", v. 39 ; pp. 227-237. ISSN 1303-6106.


Título: Assessment of species diversity and state of "Stipa tenacissima" steppes
  • Ghiloufi, Wahida
  • Quero, Jose L
  • García Gómez, Miguel
  • Chaieb, Mohamed
Tipo de Documento: Artículo
Título de Revista/Publicación: Turkish Journal of Botany
Fecha: 16 Marzo 2015
Volumen: 39
Palabras Clave Informales: Flora, "Stipa tenacissima" steppes, biodiversity, Tunisia, degradation, North Africa
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Otro
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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North African steppes are subjected to extreme degradation resulting in the reduction of their surface, genetic erosion of resources, and decrease in biodiversity. "Stipa tenacissima" steppes, which constitute one of the most representative vegetation types in the driest areas of the Mediterranean basin, are continuously degrading. With the aim of contributing to a better knowledge of the floristic composition and diagnosing the state of degradation of these steppes, we conducted a phytoecological analysis of 10 "S. tenacissima" sites in Tunisia. Floristic inventory compiled a systematic list of 46 vascular plant species belonging to 43 genera and 26 families. Species richness ranged from 4 to 18 species per 900 m2. Total vegetation cover was moderate and fluctuated between 22.8% and 49.9%. Our results revealed also a decreasing trend in species richness with increasing elevation (ρ = –0.585). Indeed, species richness was negatively correlated with slope (ρ = –0.19) and positively correlated with sand content (ρ = 0.262). Biological types were dominated by chamaephytes; this chamaephytization is due to the phenomenon of aridization and overgrazing. Moreover, the low species cover and the appearance of nonpalatable species highlighted the vulnerability of these steppes to degradation.

Proyectos asociados

FP7FP7/2007-2013/ERC Grant Agreement No. 242658Sin especificarFT MaestreBIOCOM

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ID de Registro: 40256
Identificador DC:
Identificador OAI:
Identificador DOI: 10.3906/bot-1404-57
URL Oficial:
Depositado por: Memoria Investigacion
Depositado el: 27 Jun 2016 17:33
Ultima Modificación: 27 Jun 2016 17:33
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