On the ecology of Sudanese Red Sea coastal vegetation with emphasis on mangrove ecosystem.
Average rating
Cast your vote
You can rate an item by clicking the amount of stars they wish to award to this item.
When enough users have cast their vote on this item, the average rating will also be shown.
Star rating
Your vote was cast
Thank you for your feedback
Thank you for your feedback
Author
Sugga, AwatifDate
1998
Metadata
Show full item recordAbstract
The salt marsh halophytic natural vegetation belt in the Sudan disturbed under various elements of degradation. Although managements are prominent components, they remain Ito constitute sporadic and intermittent luxuriant and moderate woodlots . Avicennia marina (forsk) verih is the sole mangrove species in Sudan . Its wood-like landscape supports and all ecologically tuned assemblage of fauna and flora. Mangroves in Sudan occupy protected shallow muddy habitats (mersas) and lagoons which receive considerable amount of fresh water and sediments carried to the Red Sea via a network of seasonal khors , where muddy cracking sediments is deposited. In each of the nineteen (19) identified and sizeable mangroves stands reported during this study , local topography at each site affects the forest structure and productivity , as reflected through the selected examples investigated in detail at t the present work (Klanaeib , Halout and kilo-Tammania forests) .Considerable damage in mangrove swamps has and still is caused by biological and natural stresses ( average loss per the last forty (40) years is 33.5% at Klanaeib to 60.0% at Kilo-Tammania ). Avicennia marina - growing in the saline muddy shallow swamps in Sudan is well adapted to the high temperature ( up to 31.08'C in summer ), and salinities ( up to 44.880/ooat K1anaeib). This is indicated by the law water potential values recorded during this study ( ranges between 78.24 - 63.42 bars) during summer mornings and evenings . The values of water potent i,,1 are normally moderated by suitable water depth, protection from dry strong winds and higher water and sediments mild salinities. Sufficient capacity of survival and regeneration is reported in Avicennia marina the planting material is found to be available between December to February . Mangrove habitats are good sites for breeding and nursering marine commercial fish , Crabs and shellfish . Mangroves swamps are considered as one of the most biologically productive areas along the Red Sea coast-line . Mean mature tree height up to 8.9901, recorded at Halout , girth ranges between 24.11 em to 91.71 cm is recorded at Kilo-Tam mania and Halout respective ly. On the other hand crown area ranging between 0.81 012 to 10.56 m2 has been noted at KiloTammania and Halout respectively . The present study •shows that Avicennia marina leaves, stem and seeds contain considerable reserves of lipids ,fiber and protein; lipids content range is 11.39% in leaves to 16.02% in seeds. On the other hand crude fiber gave values as high as 19.09' in seeds to 23.33% in stems. Furthermore , crude protein has a mean value of 4.06% in stems and up to 5.25% in seeds . The study of other major halophytic vegetation revealed that the maximum percentage ground cover (40.45%) and frequency (5 1.65) were given by Suaeda monica in the northern locations ( latitudes 19 N and 21N). The findings of this research revealed that despite the recent alarming rate of destruction of the Red Sea coastal communities including mangroves , luxuriant stands sti ll exist in naturally protected areas . Henceforth , conservation of each of the nineteen ( 19) identified mangroves forests , using suitable management tools , is vital . In addition, silvicultural planting should be carried out to increase the area of these stands and Avicennia marina densities, considering the effects caused by the local ecological variation on each stand . The interactions between the abiotic and biotic environmental components and their collective impact upon the Mangrove ecosystem in Sudan is crucial since they determine the persistence and flourishunent or the extinction of the present mangrove stands along the Red Sea coasts. Notes: Enter any additional information about the item Subject : ASFA: Click the ‘Subject ASFA’ link below to select appropriate ASFA keywords or phrases. Do just wait until the a-z comes up Avicennia mangrove Subject Categories Subject: Uncontrolled keywords: Enter any other subject keywords. Separate the terms with a semi-colon(;) Geographical Terms: Enter geographical coverage keywords. Separate the terms with a semi-colon(;) Port SudanPages
312pp.Degree
PhDPublisher or University
University of KhartoumCollections