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

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Abstract

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 salt-tolerant 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 × 20 m2), 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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Acknowledgments

The author would like to thank Yousef Al-Hamad and Abd El-Rahman Al-Agmy for their assistance during field work and soil analysis, and referees for their valuable remarks.

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Authors and Affiliations

  1. Botany Department, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt

    Raafat H. Abd El-Wahab

  2. Science Department, Faculty of Basic Education, Public Authority for Applied Education and Training, 73251, Adailiya, Kuwait

    Raafat H. Abd El-Wahab

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  1. Raafat H. Abd El-Wahab
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Correspondence to Raafat H. Abd El-Wahab.

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Editor: Virginia R. Burkett.

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Abd El-Wahab, R.H. Species richness, structure, and conservation of Nitraria retusa communities in the coastal salt marshes of Kuwait. Reg Environ Change 16, 1097–1107 (2016). https://doi.org/10.1007/s10113-015-0831-0

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  • DOI: https://doi.org/10.1007/s10113-015-0831-0

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