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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/238

Authors: Rawda, Seman
Advisors: Prof. Zerihun Woldu
Keywords: Abandoned
livestock dung
seed dispersal
Copyright: 2007
Date Added: 13-Nov-2007
Publisher: Addis Ababa University
Abstract: Dung seed content of cattle, donkey and sheep were studied using a greenhouse technique. Four replicates of 125 g dry weight of dung from each type of livestock were collected during 12 consecutive sessions starting from October 2/2006 –March16/2007 in natural grassland. The comparison is done among animal dung and control as well as within animal dung in 15, 30, 60, 90 and 180 days intervals. Multivariate numerical analysis as resemblance index was used to compare species composition among animals dung sources. A substantial quantity and range of seeds are dispersed by the three livestock species in grazed ecosystems, and this could have a significant effect on the dynamics and species richness of these systems. A total of 7417 seedling from 41 species germinated which is equivalent to 206 germinations per kg of dung. The most abundantly and frequently recorded plant species were Eragrostis teff and Trifolium tembense and different Poaceae and Fabaceae species. Seed density and species richness were further analyzed by Shannon-Weiner Diversity Index. This study proves the effectiveness of livestock in the dispersal of viable seed via dung. The differences in richness and vegetation composition show clarification over time. This experiment proves the potential utility of this treatment for the restoration of species richness in abandoned pastures.
Description: A thesis submitted to the Department of Environmental Science For partial Fulfillment of the requirements for degree of Master of Science in environmental science
URI: http://hdl.handle.net/123456789/238
Appears in:Thesis - Environmental Sciences

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