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

Ghiloufi, Wahida and Quero, Jose L and García Gómez, Miguel and 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. https://doi.org/10.3906/bot-1404-57.

Description

Title: Assessment of species diversity and state of "Stipa tenacissima" steppes
Author/s:
  • Ghiloufi, Wahida
  • Quero, Jose L
  • García Gómez, Miguel
  • Chaieb, Mohamed
Item Type: Article
Título de Revista/Publicación: Turkish Journal of Botany
Date: 16 March 2015
Volume: 39
Subjects:
Freetext Keywords: Flora, "Stipa tenacissima" steppes, biodiversity, Tunisia, degradation, North Africa
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

Funding Projects

TypeCodeAcronymLeaderTitle
FP7242658BIOCOMFT MaestreBiotic community attributes and ecosystem functioning: implications for predicting and mitigating global change impacts

More information

Item ID: 40256
DC Identifier: http://oa.upm.es/40256/
OAI Identifier: oai:oa.upm.es:40256
DOI: 10.3906/bot-1404-57
Official URL: http://journals.tubitak.gov.tr/botany/issues/bot-15-39-2/bot-39-2-3-1404-57.pdf
Deposited by: Memoria Investigacion
Deposited on: 27 Jun 2016 17:33
Last Modified: 04 Jun 2019 15:53
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