Phytosociology and size structure of Nitraria retusa along the Egyptian Red Sea coast

Shaltout, Kamal H.; Sheded, Mohamed G.; El-Kady, H. F.; Al-Sodany, Yassin M.

doi:10.1006/jare.2002.1054

Cited by 45 publications

(33 citation statements)

References 14 publications

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“…High-salinity conditions are considered the most limiting factor controlling the plant life in coastal salt marsh habitats. Consistent with the findings of Halwagy and Halwagy (1977), Shaltout et al (2003), Suleiman et al (2008), and El-Ghareeb et al (2006, the present study indicates that N. retusa can tolerate wide range of soil conductivity, varying between 12 and 65 mS cm -1 . Aronson (1989) stated that shrubs of N. retusa tolerate salinity up to 90 mS cm -1 .…”

Section: Discussionsupporting

confidence: 94%

Species richness, structure, and conservation of Nitraria retusa communities in the coastal salt marshes of Kuwait

El-Wahab

2015

Reg Environ Change

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Although the coastal salt marshes of Arabian Gulf have been altered extensively by human development activities, there is a paucity of data describing changes in the distribution and abundance of native coastal plant communities. The main objectives of this study are to determine vegetation condition, size structure, and conservation status of Nitraria retusa, a medicinal and salttolerant shrub, in disturbed and non-disturbed coastal salt marshes of Kuwait. Size measurements of Nitraria shrubs and nabkas, which are mounds of sediment developed around shrubs, were carried out in 50 quadrats (20 9 20 m 2 ), randomly selected inside and outside Sabah Al-Ahmad Natural Reserve. Species richness and soil properties of nabkas and interspaces, the open areas between the nabkas, were also measured. The results revealed that nabkas of Nitraria in non-disturbed sites are more stable and rich in plant diversity than those in disturbed sites. Mean height and mean canopy diameter of Nitraria shrubs, total plant cover, and species richness are significantly higher in non-disturbed sites than disturbed sites, which indicate the positive influences of conservation for long term on vegetation structure and species richness. The results of soil analyses indicate the important role of nabkas in providing refuges for plant life and species diversity. The present study indicates that more than 50 % of the N. retusa community has been lost during the last few decades. Therefore, N. retusa should be considered an endangered species in Kuwait. The reduction in vegetation cover, a decline in species richness, and the overall degradation of salt marshes are attributed to human development activities along the coast of Kuwait. Effective conservation actions for threatened species in degraded coastal salt marshes of this region include establishment of protective enclosures, prohibitions on development that adversely affects native plant communities, and the planting native salt-tolerant shrubs to facilitate regeneration.

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Section: Discussionsupporting

confidence: 94%

Species richness, structure, and conservation of Nitraria retusa communities in the coastal salt marshes of Kuwait

El-Wahab

2015

Reg Environ Change

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“…studies were carried out, e.g., those of Serag et al (1998), El Shayeb et al (2002, and Salama and Ali (2003) on the Mediterranean coast of Egypt and Shaltout et al (2003) and Abd El-Ghani and Amer (2003) on the Red Sea coast and the Sinai Peninsula. Moreover, the works of Abd ElGhani et al (2013) and Salama et al (2013) in Egypt and Abdel Khalik et al (2013) in Saudi Arabia are among most recent studies conducted that highlight the importance of the application of numerical methods such as cluster and correlation analyses and multivariate techniques such as correspondence analyses to express the relationships between weed species and relevant habitats.…”

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confidence: 99%

Spatial distribution and soil characteristics of the vegetation associated with common succulent plants in Egypt

El-Ghani¹,

Soliman²,

El-FATTAH³

2014

Turk J Bot

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Euphorbiaceae, Apocynaceae, Agavaceae, Asphodelaceae (Aloeaceae), Chenopodiaceae, and Portulacaceae (Oldfield, 1997). Succulents are native to many regions from northern Europe to the Far East, although most are concentrated in southern and eastern Africa. Exploration and trading over the last 4 centuries and natural distribution enabled cacti and succulents to establish themselves in new habitats across the world (Hewitt, 1993). Cactaceae is the largest family of succulent plants, nearly endemic to North and South America, followed by Aizoaceae in South Africa. Euphorbiaceae is considered the fourth largest family among flowering plants, with over than 1000 species and worldwide distribution.Succulents vary in shape and size from more than a few millimeters high to massive trees such as the African baobab (Adansonia digitata L.). Hewitt (1993) recognized 3 different habitats for succulents: 1) desert plains, including harsh dry habitats; (2) mountainous terrain, including high plateau, screes, and rocky slopes, where the soil is often very thin, does not retain much water, and has a high mineral content that can be toxic to nonsucculent plants; and 3) forests, where species inhabit subtropical and tropical rainforests such as those in Central and South America, Africa, Sri Lanka, and the West Indies, where the climate is constantly hot and humid and sunlight is filtered through a thick tree canopy. Economically, they can be used for medicinal (Aloe ferox Mill.) or mystical (Haworthia limifolia Marloth) purposes or as food [Fockea edulis (Thunberg) K.Schumann] and cordage (Sansevieria aethiopia Thunb.).Studies on succulent vegetation, distribution, phytosociology, and biodiversity are universally known

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“…The height to diameter ratio of I. carnea provides information on the growth habit of the plant (Shaltout et al, 2003). Results from this study demonstrate that this ratio is more than one for I. carnea ramets, indicating that the ramets tend to expand vertically rather than horizontally.…”

Section: Discussionmentioning

confidence: 85%

Growth behaviour of the invasive species Ipomoea carnea in the Nile Delta, Egypt

2010

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Ipomoea carnea Jacq., a native shrub of South America, grows in dense populations along river beds, river banks, canals and other waterlogged (wetland) areas. It has become naturalised along canals, drains, road sides and field edges in the Nile Delta, Egypt. The rapid growth rate, spread and adaptability from xeric to aquatic habitats indicates that this plant may potentially become a disastrous invasive species in Egyptian water bodies. Fifty established stands covering seven habitats (railway sides, waste lands, road sides, drain and canal banks, road dividers and field edges) in the Nile Delta were used in this experiment. In each stand, 20 ramets were permanently marked to estimate the monthly variations in such growth variables as phenology, height and diameter of the ramet canopy, number of flowers, leaves and fruits. The results showed a significant variation in growth variables relative to habitat types. Generally, I. carnea populations along the railway sides and field edges had the lowest values for most variables; while those of the road dividers, road sides and canal banks produced the highest values. The growth of I. carnea follows a seasonal pattern where the highest values for most growth variables were obtained during September and October and the lowest were recorded during June and July. The greatest flower and fruit production was observed between September and December. Similarly, it was shown that the flowering time varied in relation to habitat types; it began earlier on road sides and canal banks, but later on railway sides, road dividers and waste lands. Leaf areas of I. carnea populations in the wet habitats (e.g. drain and canal banks) were higher than those in other habitats. These results are discussed in relation to other related studies.

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Phytosociology and size structure of Nitraria retusa along the Egyptian Red Sea coast

Cited by 45 publications

References 14 publications

Species richness, structure, and conservation of Nitraria retusa communities in the coastal salt marshes of Kuwait

Species richness, structure, and conservation of Nitraria retusa communities in the coastal salt marshes of Kuwait

Spatial distribution and soil characteristics of the vegetation associated with common succulent plants in Egypt

Growth behaviour of the invasive species Ipomoea carnea in the Nile Delta, Egypt

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