Shrubs Associations in Relation to Ecology of Savannah Rangelands at El Suki Area, Sennar State, Sudan
الموضوعات :
Abdelfadeel Abuelgasim
1
(Sinnar University)
الکلمات المفتاحية: Acacia oerfota, Combretum aculeatum, El Suki, Acacia mellifera,
ملخص المقالة :
Not all of the Sudan has been covered by post studies; and parts of it seemed more favoured research topic of the others. The first attempt to study the flora of the study area was in 1958, which included in the work of Harrison and Jackson about classification of the Sudan vegetation. The study area was very rich of plant diversity, especially trees and shrubs, because of the high rainfall and a good climate and rich soil. This study is an attempt to investigate and update the associations between the shrubs species to know their ecological positions among the vegetation cover of the Savannah range lands. A field survey was conducted in the two seasons of 2011-2012 and 2012 - 2013 at the south-eastern part of Sinnar State. Five major transects were taken, each of 3000 m length and 10 m width, in a total area of 150.000 m2. Results showed that Acacia oerfota is the dominant shrub species throughout the study area, with Acacia mellifra and Combretum aculeatum as ecological associates in relationship, because they were abundant, frequent and of high density, and less diversity in the Savannah Rangelands at El Suki Area, Sennar State, Sudan in the two seasons of survey.
Abdelaziz A.A., 2010. The effect of some management practices on decertified range lands in Sinnar Sate. Ph.D. Thesis, U of K: (University of Khartoum) 33-34.
Barbour, Michael G., Jack, H., Burk, Wanna D., Pitts, Frank S., Gilliam, Mark W. S., 1999. Terrestrial Plant Ecology third ed. Addison Wesley Longman.
Barmann, F.H., 1953. The statistical efficiency of sample plot size and shapes in forest ecology. Jour. Ecology 34: 474-487.
El Awad, A.A., 1995. Eco-taxonomical studies on the vegetation of the Sudan, Red Sea State, Sudan. Ph.D. Thesis. U. of K. (University of Khartoum), Sudan: 580pp.
Gumma, A.G.A., 1988. The flora of Ingessana Hills, S.E. Sudan with Special Reference to khor Area during January to August. Ph.D. thesis. U. of K. Sudan. 432pp.
Harrison, M.N. and Jackson, J.K., 1958. Ecological classification of the vegetation of the Sudan. Foresee Dept. Agric. Publ. Committee, Khartoum, Sudan. Forest Bull. 2: 1-45
Hassan, M.H., 1974. An Illustrated Guide to the Plant of Erkowit. U. of K. Sudan 102pp.
Keddy, P.A., 2001. Competition 2nd ed. Kluwer Academic Publishers, Dordrecht, 552 pp.
Adams, M. E., 1967. A study in ecology of Acacia mellifera, Acacia seyal and Balanites aegyptiaca in relation to land-clearing. Jour. Applied Ecology, 4(1): 221-237.
Mohammed, A.A., 2001. The Ecology of “Jebal Al Faw” and the Surrounded Area. PhD. Thesis. U. of K. (University of Khartoum) Sudan, 267pp.
OCHA, 2012. United Nations Office for the Coordination of Humanitarian Affairs, Sennar State- Administrative Map.
Ramsay, D.M.C., 1958. The forest ecology of Central Darfor, forest department, Agriculture Publication Committee, Khartoum, Sudan. Forest Bull., No. 1, 80pp.
Smith, S.D., Bunting, S.C. and Hironaka, M., 1986. Sensitivity of frequency plots for detecting vegetation change. Northwest Science, 60: 279-286.
Willner, W., 2006. "The association concept revisited". Phytocoenologia, 36 (1): 67–76.
