Floristic composition and vegetation structure of Ades forest, Oromia regional state, West Hararghe zone, Ethiopia

Atomsa, Dereje; Dibbisa, Duguma

doi:10.22271/tpr.2019.v6.i1.020

Cited by 12 publications

(8 citation statements)

References 12 publications

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“…Physiological and/or genetic adaptability such as enhanced germination capacity, resilience to harsh weather, and biotic competition for limited resources, particularly in the early colonization of new environments might make them to establish successfully [31]. Fabaceae, the second most species rich family in the present study, was ranked frst in earlier works carried out in Belete Forest [32], Wotagisho forest [33], Bonga forest [34], and Ades forest [35]. Species richness in this family might be linked to their efective reproduction (pollination) and dispersal strategies along with superior adaptation that permits them to have bigger ecological amplitudes.…”

Section: Resultsmentioning

confidence: 73%

Plant Community Composition and Structural Pattern Dynamics in Robe-Raya Natural Forest, Southeast Ethiopia

Masresha,

Abdulahi,

Chekole

et al. 2024

International Journal of Ecology

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Due to its fortuitous mix of geography, terrain, and geology, Ethiopia is the home of unique assemblages of rich biodiversity. However, this impressive biological diversity is increasingly threatened by the combined effects of different drivers before they are sufficiently investigated. The present work was carried out in Robe-Raya Natural Forest, located in Southeast Ethiopia, with the intention of examining plant community formation and structural dynamics of the forest species. Sixty (20 m × 20 m) quadrats were placed at 100 m distance along eleven east-west directed transect lines systematically. In order to gather juvenile’s data, five subquadrats (2 m × 2 m) were established within the main quadrat, distributed at each corner and middle. In each quadrat, all woody species were recorded and counted; diameter (DBH) and height were measured using tape meter and a hypsometer, respectively, and cover abundance was recorded (in %). Cluster analysis was computed using R-Package to map-out the community types. Species diversity and composition among community types were computed using the Shannon-Wiener index and Sorenson’s coefficient, respectively. Frequency, density, height, DBH, basal area, and IVI were used to analyze structural dynamics. Age-class density ratios were used to examine the regeneration status. Ninety-four woody plant species belonging to 39 families were documented. Asteraceae was the most species-rich family (10 species). The common growth form was shrubs (44.7%) followed by trees (41.5%). Cluster analysis produced four community types. In total, the species diversity and evenness were 3.75 and 0.88, respectively. The forest density and basal area were 1183.3 stems/ha and 57.52 m2·ha−1, respectively. Structural dynamics analyses demonstrated that the forest was composed of, largely, young trees and shrubs and under fair regeneration status. Certain species that have been identified to have low IVI and poor regeneration status should be prioritized for conservation.

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Section: Resultsmentioning

confidence: 73%

Plant Community Composition and Structural Pattern Dynamics in Robe-Raya Natural Forest, Southeast Ethiopia

Masresha,

Abdulahi,

Chekole

et al. 2024

International Journal of Ecology

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“…Fabaceae were considered the most dominant family represented by five species (7.9%), followed by Euphorbiaceae and Rubiaceae with four species each (6.4%), Asteraceae, Lamiaceae, Moraceae, Oleaceae, and Rutaceae with three species each (4.8%), and eight families with two species each (3.2%), while the remaining 19 families had a single species representation. The findings of this study showed that Abbo Sacred Forest has higher woody species richness than Wabero forest (47 species) [ 35 ] and Ades forest (48 species) [ 36 ] but its species richness was lower than that of Sirso forest (74 species) [ 37 ] and Wurg forest (76 species) [ 38 ] in Ethiopia. Variations in species composition among different forests could be attributed to topographic variables such as elevation, latitude, and longitude [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

“…Fabaceae were considered the dominant family in Abbo Sacred Forest which could be related to its efficient and successful dispersal mechanisms and better adaptation to a wide range of ecological conditions [ 28 ]. Fabaceae were also found to be dominant in other Afromontane forests in Ethiopia [ 36 , 40 , 41 ]. Species such as Maytenus addat (Loes.)…”

Section: Resultsmentioning

confidence: 99%

Woody Species Diversity, Composition, and Regeneration Status of Abbo Sacred Forest, Southern Ethiopia

Yigeremu

Woldearegay

2022

The Scientific World Journal

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This study was conducted in Abbo Sacred Forest in Wonsho district, Sidama Zone of Southern Nations, Nationalities, and People’s Region (SNNPR), southern Ethiopia, to investigate the woody species diversity, vegetation structure, and regeneration status of the forest. A systematic sampling design was employed to collect vegetation data. Sixty quadrats of 20 m × 20 m were laid at every 200 m interval between each quadrat and 400 m apart between each line transect following the altitudinal gradient. Quadrats of 20 m × 20 m were used to record DBH and the height of all woody plant species reaching a height of ≥2 m and a DBH of ≥2 cm. For the inventory of seedlings and saplings, five subplots of 2 m × 2 m, one at the center and the other four on each corner of the main quadrat, were used. DBH, height, seedling, and sapling density of woody species were recorded in each quadrat. The data were analyzed by using Shannon–Wiener diversity and equitability indices, and the structural analysis was carried out based on frequency, density, DBH, height, and basal area/ha−1. The importance value index was also computed. Regeneration status was computed by comparing the density data of saplings and seedlings with those of mature trees. A total of 63 woody species belonging to 56 genera and 35 families were identified. Three endemic species to Ethiopia were recorded. Analysis of selected woody species showed diverse population structures. The findings of this study revealed that small trees and shrubs dominated the forest, suggesting its status under a secondary stage of development. Some woody species require urgent conservation measures. Therefore, local and regional stakeholders should integrate and work together to develop and implement sound conservation and management strategies that encourage the sustainable utilization of forest resources.

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“…[35], asserts that basal area measurements, rather than stem counts, are a better indicator of a forest's various tree species' relative importance. The basal area of the Hereje forest was found to be greater than that of several other regional forests, including, Amoro Forest [36], the Central plateau of Shewa Menegesha and Chilimo forest ( [35], GuraLop ho [37], Adelle [38]and Angada [39] whereas, several other forests have higher than that of Hereje forest (Table 3). Three factors were used to calculate the importance value index (IVI): relative frequency, relative density, and relative dominance [24].The IVI is ecologically essential and a key structural parameter in vegetation studies, as it is the most realistic aspect of vegetation study used to compare the ecological signi cance of species [34].…”

Section: Regeneration Data Analysismentioning

confidence: 99%

Woody Species Population Structure and Regeneration Status in Hereje Natural Forest, Southwest Ethiopia

Mammo

Anamo

Bohnett

2023

Preprint

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Finding potential management interventions to lessen the negative effects of deforestation and forest degradation requires understanding the population structure and regeneration status of woody species in Ethiopia’s Hereje Natural Forest. The local population relies on the forest for ecosystem services, which in turn, alters the plant diversity and age structure of the forest and the regeneration status for future generations is uncertain. Hence, this study was conducted with the objective of determining the Woody Species population structure and regeneration status of woody species in Hereje Natural Forest in Southwest Ethiopia Three parallel transect lines (every 100 m) were established along altitudinal gradients, and 45 plots of 20 m x 20 m were used to collect vegetation data. Living woody species were counted and measured using diameter at breast height (DBH) measurements for DBH>2.5cm in each plot. Each main plot had five 2mx2m (4m2) subplots, one in the center and four at the corners. The regeneration status of each subplot was assessed by the species of woody plants present (seedlings, saplings, and mature trees/shrubs).On the studied plots, a total of 44 plant species were identified and classified into 28 families and 41 genera. The most relatively dominant species in the Hereje forest were Syzygium guineense (24.47%), Ficus sur (20%), Combretum molle (18.58%), Croton macrostachyus (18.11%), and Terminalia schimperiana (9.29%). According to the results, the density of tree species in the forest decreases as DBH classes increase. The predominance of small DBH classes is a result of excessive cutting for certain size classes by the local community, indicating extensive changes in the woody plant diversity and age structure. Overall, the forest's regeneration status was fair. Urgent interventions and enforced regulations are required to halt the major cause of forest deterioration, namely human-induced activities such as cattle grazing, illegal timber harvesting, and firewood collection. For long-term forest stability and biodiversity conservation, additional in-depth ecological studies are recommended regarding potential management interventions, monitoring protocols, and other ecological factors that contribute to the sustainable use of the forest and its products.

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Floristic composition and vegetation structure of Ades forest, Oromia regional state, West Hararghe zone, Ethiopia

Cited by 12 publications

References 12 publications

Plant Community Composition and Structural Pattern Dynamics in Robe-Raya Natural Forest, Southeast Ethiopia

Plant Community Composition and Structural Pattern Dynamics in Robe-Raya Natural Forest, Southeast Ethiopia

Woody Species Diversity, Composition, and Regeneration Status of Abbo Sacred Forest, Southern Ethiopia

Woody Species Population Structure and Regeneration Status in Hereje Natural Forest, Southwest Ethiopia

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