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The effect of Human activities on Growth and survival of Acaciatortilis Habila Area, White Nile State, Sudan

Author(s): Fatima Hassan Algunaid | Mai Mamoun Ali

Journal: Scientific Journal of Agriculture
ISSN 2322-2425

Volume: 2;
Issue: 2;
Start page: 73;
Date: 2013;
Original page

Keywords: Acacia tortilis | seed bank | regeneration | survival | arid | human activities

Acacia tartilis subsp.raddiana (sayal) plays an important role in the life of desert animals, is a major source of livestock feed, and firewood for the pastoral rural societies in Habila area, White Nile state Sudan.  low  regeneration     has  been  reported  in  recent  years  leading  to  the decline  in population  size  and  number  of  this  species.  This study aims to determine if A.  tortilis subsp.  raddiana  reduction  population  correlates  or  associates with  Soil seed banks or the  decrease of  tree density in rangeland .Observations were conducted  on the natural regeneration species and mature population in  three selected sites (inside forest, forest boundary and outside forest) the study was done  through counting  the trees and natural regeneration and samples were taken for soil seed bank analysis . The result shows  natural regeneration and soil seed bank of sayal affected by different factors such as drought and human interference including over-grazing,  over-cutting,  over-collecting,  and  habitat  destruction  have  threatened  this  species  by  increasing  the mortality  of  mature  trees  and  reducing  natural regeneration. Social demonstration must be involved in the preservation and managing this most valuable tree in arid dry area.
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