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الرئيسية > أثر الضغوط البيئية على التنوع...>الوصف

أثر الضغوط البيئية على التنوع الأحيائي النباتي في منطقة حلوت على ساحل البحر الأحمر

المصدر: مجلة جامعة البحر الأحمر
الناشر: جامعة البحر الأحمر
المؤلف الرئيسي: أحمد، أحمد عبدالعزيز (مؤلف)
مؤلفين آخرين: الحاج، أماني علي (م. مشارك)
المجلد/العدد: ع1
محكمة: نعم
الدولة: السودان
التاريخ الميلادي: 2011
الشهر: أكتوبر
الصفحات: 28 - 45
ISSN: 185 -6295
رقم MD: 752784
نوع المحتوى: بحوث ومقالات
قواعد المعلومات: EduSearch, HumanIndex
مواضيع:
البيئة المناخية | الغطاء النباتي | الملوحة | منطقة حلوت | السودان
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المستخلص: This study was conducted at the coastal area of Marsa Halout and the surrounding vicinity North of Port Sudan during the years 2007 to 2008. The main objectives of the study were to elucidate the environmental as well as induced stresses on vegetation density and cover in the study area. The degradation of the ecosystem، in relation to previous studies، was also investigated in the area extending South of Arbaat to Marsa Halout via a net work of valeys، khors and seasonal flooding streams which drain into the sea. The study also recorded the dynamism and shift of plant cover across the Red Sea hills ، valeys،salt marshes and Red Sea shore in the study area. The methodology of the study was based on vegetation survey which included location، geomorphology as well as plant community description in the study area. Particular emphasis was also given to the mangrove (Avicennia marina) plant community in studying physical parameters such as salinity، PH and temperature. The study also recorded the impact of coastal development activities such as salt pans (mallaha)، brick making، tourism، infrastructure roads، etc، on plant stands and distribution.A questionnaire was also designed and used to highlight the role of local communities towards environment conservation and habitat management. The findings of the study revealed the following: The presence of twenty plant species in widely disrupted communities in the study area during 2007 compared to previous studies of 1991(Ali and Mohamed). The present cover was 45% lower than the thirty six previously reported plant species. There was a combination of a multitude of naturally concerted deterioration factors as well as a range of induced stresses on the mangrove stands which declined by 69% compared to studies done by PERSGA in 2003. The study area was affected by overgrazing، tree cutting، deforestation as well as aspects of land degradation and high salinity symptoms. Areas close to the sea shore showed clear signs of eco-degradation due to human interventions including construction of salt pans، permanent tourism structures، desalination plant pollutants، road effect on natural water discharge and brick making as part of the overall deterioration in the area. The role of local communities was passive in conservation of bio-systems and habitats due to lack of awareness and natural climatic factors in terms of quantity and distribution of rainfall which persisted for the past 20 years. The recommendations of the study were: Policies and legislation advocated for integrated coastal zone management should be put into effect. These policies need to be supplemented by off-shore legislations so as to give continuity to conservation mechanisms. Steps for environmental impact analysis should be emphasized during project appraisals. The project management should be adequately responsible for natural habitat conservation and development at project sites. Investors، including the government، should embark on environment sustenance and development on long-term basis Awareness campaigns and capacity building for local communities directed towards management of available resources for the existing and future generations need to be implanted. Further studies in similar sensitive areas along important valeys and their inlets to the Red Sea coast needs to be assessed to compliment the overall strategy towards plant habitat data availability.
ISSN: 185 -6295

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