Regeneration of fourteen tree species in Harenna forest, southeastern Ethiopia

Getachew, Tesfaye; Teketay, Demel; Fetene, Masresha

doi:10.1078/0367-2530-1210063

Cited by 98 publications

(94 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Comparable to many other tree species (Petit and Hampe, 2006), recruitment rates of young P. africana seedlings to older saplings are low, potentially because of high light requirements (Tsingalia, 1989;Tesfaye et al, 2002). Thus, multiple mortality factors, both random and non-random, may lead to the observed thinning and drive the initial decrease in SGS.…”

Section: Sgs Changes Across Life Stagesmentioning

confidence: 99%

“…Secondary seed dispersal seems to be neglectible in the species, as experiments with thread-marked P. africana seeds did not record any caching, but only later predation of seeds (Svd Gönna and M Melcher, personal communication). Survival to the sapling stage is very low, potentially because of high light requirement as well as strong seed predation and seedling herbivory (Tsingalia, 1989;Tesfaye et al, 2002).…”

Section: Study Speciesmentioning

confidence: 99%

See 1 more Smart Citation

Fine-scale spatial genetic dynamics over the life cycle of the tropical tree Prunus africana

et al. 2014

View full text Add to dashboard Cite

Studying fine-scale spatial genetic patterns across life stages is a powerful approach to identify ecological processes acting within tree populations. We investigated spatial genetic dynamics across five life stages in the insect-pollinated and vertebratedispersed tropical tree Prunus africana in Kakamega Forest, Kenya. Using six highly polymorphic microsatellite loci, we assessed genetic diversity and spatial genetic structure (SGS) from seed rain and seedlings, and different sapling stages to adult trees. We found significant SGS in all stages, potentially caused by limited seed dispersal and high recruitment rates in areas with high light availability. SGS decreased from seed and early seedling stages to older juvenile stages. Interestingly, SGS was stronger in adults than in late juveniles. The initial decrease in SGS was probably driven by both random and non-random thinning of offspring clusters during recruitment. Intergenerational variation in SGS could have been driven by variation in gene flow processes, overlapping generations in the adult stage or local selection. Our study shows that complex sequential processes during recruitment contribute to SGS of tree populations.

show abstract

Section: Sgs Changes Across Life Stagesmentioning

confidence: 99%

Section: Study Speciesmentioning

confidence: 99%

Fine-scale spatial genetic dynamics over the life cycle of the tropical tree Prunus africana

et al. 2014

View full text Add to dashboard Cite

show abstract

“…It is generally recognized that the species richness of seedlings is positively associated with species abundance (Denslow and Guzman G 2000); the species composition of regeneration communities in harvested areas appears determined by a complex assortment of environmental factors (Park et al 2005). The restricted distribution and range of the occurrence of species can be explained by the presence of steep ecological gradients including soil moisture, organic matter, exchangeable cations, soil pH, and temperature (Tesfaye et al 2002). Differences in topography, slope, and altitudes among clusters contribute to differences in seedling species composition (Figueroa-Rangel and Olvera-Vargas 2000).…”

Section: Effects Of Soil Properties On the Abundance And Presence Of mentioning

confidence: 99%

Environmental Factors Affecting the Abundance and Presence of Tree Species in a Tropical Lowland Limestone and Non-limestone Forest in Ben En National Park, Vietnam

Nguyen¹,

Mitlöhner²,

Bich³

et al. 2015

Journal of Forest and Environmental Science

View full text Add to dashboard Cite

The effect of environmental variables on the presence and abundance of tree species in a tropical lowland undisturbed limestone and non-limestone forest in Ben En National Park, Vietnam was investigated. The relationships between 13 environmental variables and 29 tree species with a DBH ≥10 cm, as well as between six 6 physical variables with 26 species of seedling and sapling communities were assessed by canonical correspondence analysis (CCA). Data concerning all tree species ≥10 cm DBH were collected from eighteen 400 m 2 sample plots, while the abundance of regeneration (all individuals ≤5 cm DBH) was counted in fifty 2x20 m strip-plots. The significance of species-environments correlations were tested by distribution-free Monte Carlo tests. The CCA of the 29 examined tree species and 13 environmental variables indicated that the presence and abundance of the tree species were closely related to topographic factors. We may confirm that soil properties including pH, soil moisture content, and soil textures, were the most crucial factor in tree species composition and their distribution. Several species including Pometia pinnata, Amesiodendron chinense, Gironniera cuspidate, Cinnamomum mairei, and Caryodaphnopsis tonkinensis were not controlled by soil properties and topographic variables. The CCA also indicated that the abundance of regeneration tree species at all sites had positive and significant correlations with soil depth, while the occurrence of several other tree species (such as Koilodepas longifolium and Aglaia dasyclada) was positively correlated with a higher slope and rocky outcrop.

show abstract

“…Understanding natural regeneration is of paramount importance to examine the build-up of future forest structure and composition (Ceccon et al 2006, Tesfaye et al 2002. The processes involved in tree sexual regeneration can be influenced by many factors, such as variations in seed dispersal intervals, seed quality, wind direction and speed, slope gradients and aspects and soil moisture availability (Vieira & Scariot 2006).…”

Section: Introductionmentioning

confidence: 99%

Regeneration dynamics in the laurel forest: changes in species richness and composition

Arévalo¹,

Nascimento²,

Fernández-Lugo³

et al. 2018

iForest

View full text Add to dashboard Cite

The recovery and survival of the Macaronesian laurel forest depends on its regeneration strategies. After years of long-term monitoring, both sexual and asexual regeneration appear to be equally important. However, the mechanisms for each are just beginning to be understood. In order to contribute to the understanding of the laurel forest sexual regeneration, we analyzed the species composition of the seedling bank every two weeks over three years in the laurel forest of Anaga (Tenerife, Canary Islands). We compared the species compositions of the seedling bank with the canopy, and analyzed changes in their diversity over this period in different forest stands. We found that species diversity (evenness) is different among plots regardless of the stand. In some cases, plot diversity remained constant over time, while others showed some variations, which were little related to climatic conditions (temperature and precipitation). We also found no relationship between the seedling bank and canopy composition, with shade-intolerant species being more abundant in the former. Although climatic conditions remained constant during the period and other environmental conditions did not vary either, some changes were found in the seedling bank species composition. These were related to the increased degree of conservation of the laurel forest of Anaga (by closing unpaved roads, limiting access, and the abandonment of agriculture) that had negatively affected the density of shade-intolerant species. We suggest that such conservation measures should be maintained and extended to other areas where agriculture has been recently abandoned to allow the potential establishment of laurel forest and late successional species.

show abstract

Regeneration of fourteen tree species in Harenna forest, southeastern Ethiopia

Cited by 98 publications

References 15 publications

Fine-scale spatial genetic dynamics over the life cycle of the tropical tree Prunus africana

Fine-scale spatial genetic dynamics over the life cycle of the tropical tree Prunus africana

Environmental Factors Affecting the Abundance and Presence of Tree Species in a Tropical Lowland Limestone and Non-limestone Forest in Ben En National Park, Vietnam

Regeneration dynamics in the laurel forest: changes in species richness and composition

Contact Info

Product

Resources

About