Vegetation ecology of phytogenic hillocks (nabkhas) in coastal habitats of Jal Az-Zor National Park, Kuwait: Role of patches and edaphic factors

El‐Sheikh, Mohamed A.; Abbadi, Ghanim A.; Bianco, Pietro Massimiliano

doi:10.1016/j.flora.2010.01.002

Cited by 49 publications

(35 citation statements)

References 26 publications

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“…The life form spectra of the study area indicated the dominance of a typical desert life form. The dominance of annuals due to unfavorable conditions of little rainfall and excessive drought is in accordance with many findings in other deserts in Iran and other parts of the world (Asri 2003, Zarei et al 2008, El-Ghanim et al 2010, El-Ghani & Amer 2003, El-Sheikh et al 2010. Communities with a single dominant species such as A. sieberi or Haloxylon ammodendron, which were recognized by multivariate techniques, are also reported in other deserts of Iran such as the Poshtkouh rangelands of the Yazd province (Jafari et al 2004), which is dominated by A. sieberi.…”

Section: Discussionsupporting

confidence: 85%

An analysis of vegetation and species diversity patterns in sand dune and gravel desert ecosystem

Abdi

Afsharzadeh

2016

Bot. Sci.

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This study provides an analysis of vegetation and environmental relationships as well as diversity patterns in sand dunes and gravel desert plains of northern Badrud, Iran. A total of 63 species representing 49 genera and 15 families were recorded. The largest families were Asteraceae (22.2 %) and Chenopodiaceae (19.0 %). Therophytes (66.67 %) were the dominant life form. Chronological analysis showed 57.14 % Irano-Turani elements. Data from 60 1.5 × 2 m 2 quadrats, selected systematically randomized along three transects, were collected. Both two-way indicator species analysis (TWINSPAN) and cluster analysis using Ward's method resulted in the recognition of three communities: an Artemisia sieberi community in the center plain with a Shannon-Wiener diversity index of 0.3, a Stipagrostis plumosa -Schismus arabicus community on the lower sand dunes with a Shannon-Wiener diversity index of 0.7, and a Haloxylon ammodendron community on the higher sand dunes with a Shannon-Wiener diversity index of 0.2. Detrended correspondence analysis (DCA), non-metric multidimensional scaling (NMDS), and multi-response permutation procedure (MRPP), confirmed the separation of TWINSPAN groups as well as the heterogeneity of the Artemisia sieberi -Schismus arabicus community, suggesting a distinct group with Artemisia sieberi and Schismus arabicus as the dominant species. Vegetation environmental analysis by means of multivariate techniques of principal component analysis (PCA) and canonical correspondence analysis (CCA) indicated that very coarse gravel has a strong negative effect on diversity and a negative effect on species cover percentage. Bare ground showed a highly positive effect on diversity variables. Soil analysis suggests final seral stages of succession towards severe desertification.

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Section: Discussionsupporting

confidence: 85%

An analysis of vegetation and species diversity patterns in sand dune and gravel desert ecosystem

Abdi

Afsharzadeh

2016

Bot. Sci.

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“…Detrended correspondence analysis (DCA) (Hill, 1979b) was applied to the same first matrix data set in order to obtain an efficient graphical representation of the ecological structure of vegetation groups identified using TWINSPAN and to verify the identified vegetation units. In order to detect correlations between derived vegetation associations and environmental data, canonical correspondence analysis (CCA) according to Ter Braak and Smilauer (2002) was conducted with species cover, stands, and soil variables using the second matrix (El-Sheikh et al, 2010). Relationships between the ordination axes on one hand and community and soil variables on the other were tested using Pearson's simple linear correlation coefficient (r).…”

Section: Discussionmentioning

confidence: 99%

Floristic diversity and vegetation analysis of Wadi Al-Noman, Mecca, Saudi Arabia

Khalik¹,

El‐Sheikh²,

Elaidarous³

2013

Turk J Bot

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Wadi Al-Noman in Mecca is one of the most important wadis. It was included among the most important water sources where the springs and wells of Zobida run and it provides drinking water for the holy places in Mecca and visitors to the Kaaba and Arafat regions. The present study provides an analysis of floristic composition, vegetation types, and structure and species distribution at 20 sites, emphasising the environmental factors that affect species distribution. A total of 126 species representing 39 families of vascular plants are recorded. Fabaceae, Poaceae, and Boraginaceae are the largest families, and therophytes and chamaephytes are the most frequent, indicating a typical desert life-form spectrum. The floristic composition of the different geomorphologic landscape units shows differences in species richness. The highest species richness value (23 species stand -1 ) is recorded in the wadi bed. The lowest species richness value (18 species stand -1 ) is recorded in the wadi plateau and fissures. Chorological analysis revealed that 52% of the studied species are bioregional, native to the Saharo-Arabian-Sudano-Zambezian region. After application of the TWINSPAN, DCA, and CCA programs 4 vegetation groups were identified, and they were named after the characteristic species as follows: (I) Aristolochia bracteolata-Cucumis prophetarum; (II) Calotropis procera-Acacia hamulosa-Caralluma russeliana; (III) Acacia abyssinica-Acacia hamulosa-Tephrosia desertorum; and (IV) Argemone ochroleuca-Senna italica. The associations and speciation of these Wadi Al-Noman plants demonstrate significant variation in pH, electrical conductivity, soil mineral contents, and human impact.

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“…According to Shaltout and Mady (1993), this behavior may be a strategy of the desert trees and shrubs in order to provide safe sites for their self-regeneration, as the horizontal expansion usually provides shade which decreases soil heating and increases soil moisture facilitation seedling recruitment. This was demonstrated for Nitraria retusa by Shaltout et al (2003) along the Red Sea Coastal land and El-Sheikh et al (2010) in coastal habitats of the Kuwait Bay of the Arabian Gulf. Al-Sodany (2003) gave evidence for such shelter phenomena by common shrubs in the western Mediterranean coast of Egypt.…”

Section: Discussionmentioning

confidence: 77%

Size structure and dynamics of some woody perennials along elevation gradient in Wadi Gimal, Red Sea coast of Egypt

Galal

2011

Flora - Morphology, Distribution, Functional Ecology of Plants

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Vegetation ecology of phytogenic hillocks (nabkhas) in coastal habitats of Jal Az-Zor National Park, Kuwait: Role of patches and edaphic factors

Cited by 49 publications

References 26 publications

An analysis of vegetation and species diversity patterns in sand dune and gravel desert ecosystem

An analysis of vegetation and species diversity patterns in sand dune and gravel desert ecosystem

Floristic diversity and vegetation analysis of Wadi Al-Noman, Mecca, Saudi Arabia

Size structure and dynamics of some woody perennials along elevation gradient in Wadi Gimal, Red Sea coast of Egypt

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