Vegetation Succession in the Volcanic Region Between Kulumsa and Metahara
| dc.contributor.advisor | Berhan Tewolde (PhD) | |
| dc.contributor.author | Habtemariam Isaac | |
| dc.date.accessioned | 2018-07-03T06:09:11Z | |
| dc.date.accessioned | 2023-11-08T16:32:42Z | |
| dc.date.available | 2018-07-03T06:09:11Z | |
| dc.date.available | 2023-11-08T16:32:42Z | |
| dc.date.issued | 1984-06 | |
| dc.description.abstract | Six sites \'/ere studied in the Ethiopian Rift Valley in the Administrative Regions of Shoa and Arsi \Vhere volcanic eruptions had taken place at different times. The aim of the study ~las to determine vegetational succession on these volcanic rocks according to the chronosequence. The study \Vas made from December 26, 1980 to February 6, 1982. Forty t\Vo stands ~lere sampled (seven in each site) and the presence of 172 species in the stands \Vas recorded. Computer analysis of the ra\V data using Normal Association Analysis \Vas made at the Central Statistical Office (C.S.O) in Addis Ababa and using Indicator species Analysis (I.S.A.) at the Ethiopian Road Authority (E.R.A). Indicator species Analysis divided the vegetation in the study areas into groups according to the chronosequence while that using Normal Association Analysis did not. The groupings obtained from the Normal Assvciation Analysis and the Indicator species Analysis ~lere statistically tested for significan't contrasts. Wolenchiti (third in chron0sequence) was found to have the highest number of grass and herb species. The successional trend for all species of plants showed an increase from the first upto the third age levels and a decrease in the fourth and fifth age levels except for the shrub species where the fifth age level showed the maximum number. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/123456789/5587 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Biology | en_US |
| dc.title | Vegetation Succession in the Volcanic Region Between Kulumsa and Metahara | en_US |
| dc.type | Thesis | en_US |