An Ecological Analysis of the Vegetation Along the Eastern Escarpment of Wello, Ethiopia
| dc.contributor.advisor | Bekele Tamrat (PhD) | |
| dc.date.accessioned | 2018-07-18T08:05:35Z | |
| dc.date.accessioned | 2023-11-09T04:21:27Z | |
| dc.date.available | 2018-07-18T08:05:35Z | |
| dc.date.available | 2023-11-09T04:21:27Z | |
| dc.date.issued | 2005-02 | |
| dc.description.abstract | Woody vegetation analysis was made along eastern Rift Valley escarpment in Wello. The study was earned out based on preferential sampling of the vegetation by establishing seventy 20 X 20 m releves. A total of 216 species belonging to 62 families were identified and described. Out of these, 104 woody species and succulents were used for vegetation classification. Two-way Indicator Species Analysis (TWINSPAN ) classified the vegetation into seven woody vegetation types , These are: Dodonaea angustifolia Type (I), Enclea schimperi ssp. racemosa-Acacia lahai- Dichrostachys cinerea Type (II), Cadia purpurea-Euclea schimperi ssp, racemosa-Enphorbia candelabrum Type (III), Acacia asak-Grewia bicolor-Sansevieria ehrenbergii Type (IV), Ximenia americana-Acacia asak Type ( V), Acacia mellifera-A. oerfota Type (VI), and Prosopis julijlora Type (VII). Woody species were counted and later the relative density and importance value index of the dominant woody species was calculated. Endemic and invasive species were identified. The diversity and evenness of each community was compared using Shannon-Weiner diversity and evenness index. Correlation of different environmental factors with the community types was made using Pearson 's coefficient and Tukey's HSD family error test. The interrelationships among environmental variables were analyzed. The results of species diversity showed that communities at the high altitudes are species rich while richness decreases down elevation gradient. Altitude and slope were found to be the most important environmental factors in determining the distribution and composition of species along communities. Most of the vegetation was found highly disturbed except along inaccessible steep slopes, few protected and privately owned areas indicating some implications of conservation and management . Keywords: Environmental variables , Plant communities, Releves, TWINSPAN | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/123456789/9205 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa Universty | en_US |
| dc.subject | Environmental variables | en_US |
| dc.subject | Plant communities | en_US |
| dc.subject | Releves | en_US |
| dc.subject | TWINSPAN | en_US |
| dc.title | An Ecological Analysis of the Vegetation Along the Eastern Escarpment of Wello, Ethiopia | en_US |
| dc.type | Thesis | en_US |