scholarly journals Woody Species Structure and Regeneration Status in Kafta-Sheraro National Park Forest, Tigray Region, Ethiopia

2020 ◽  
Author(s):  
fitsum temesgen ◽  
Bikila Warkineh
Keyword(s):  
National Park ◽  
Soil Seed Bank ◽  
Basal Area ◽  
Floristic Composition ◽  
Woody Species ◽  
African Elephant ◽  
Species Structure ◽  
Charcoal Production ◽  
Tigray Region ◽  
Intensive Farming

The natural vegetation study was conducted in Kafta-sheraro national park (KSNP) North, Ethiopia to explore floristic composition, structure and regeneration of woody species in the home of African elephant. In the park, the above information is not well documented which is necessary for conservation. Data were collected From August to December 2018. The vegetation data were collected from 161 quadrats of size 20m×20m, 5mx5m for shrub ̸ tree, sapling and seedling respectively. Individual trees and shrubs DBH >=2.5cm and height >=2m were measured using Tape meter and Clinometer respectively. DBH, frequency, density, basal area, and IVI were used for vegetation structure. A total of 70 woody species 46 (65.7%) trees, 18 (25.7%) shrubs and 6 (8.6%) tree ̸ shrub) were identified. The total basal area and density of 79.3 m2 ha-1, and 466 ±12.8 (S.E.) individuals ha-1 were calculated for 64 woody species. Fabaceae was the most dominant family occupied 16 species (23.0%) followed by Combretaceae 8 species (11.4%). Acacia mellifera and Combretum hartmannianum were the most dominant and frequent species. Abnormal patterns of selected woody species were dominantly identified. Regenerating status all the woody plant species was categorized as “Fair” (18.75%), “Poor” (7.81 %) and “None” (73.44%). However, there is good initiation for conservation of the park; still the vegetation of the park was threatened by firewood collection, charcoal production, fire, intensive farming, mining and over grazing. Therefore, the study area as the habitat for the population of the African elephant; the KSNP should be recommended the highest conservation priority and studied the soil seed bank of species having poor regeneration condition.

scholarly journals The Effects of Landscape Change on Plant Diversity and Structure in the Bale Mountains National Park, Southeastern Ethiopia

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Annissa Muhammed ◽  
Eyasu Elias
Keyword(s):  
Species Richness ◽  
Landscape Change ◽  
National Park ◽  
Diversity Index ◽  
Anthropogenic Activities ◽  
Sustainable Use ◽  
Basal Area ◽  
Floristic Composition ◽  
Woody Species ◽  
Economic Benefits

Bale Mountains National Park is one of the protected areas in Ethiopia that holds the largest area of Afroalpine habitat in Africa and the second largest stand of moist tropical forest. Nevertheless, human settlements, overgrazing, and recurrent fire are the main problems in the park. This study aimed to determine the effects of human-induced landscape change in floristic composition and structure in the park. The vegetation data were collected systematically from 96 sample plots laid along 24 line transects in the edge and interior habitats of the six land cover types. Vegetation composition and landscape structural analysis were made using R software version 3.5.2 and FRAGSTATS version 4.2.1, respectively. Patch number was strong and positively affected species richness (r = −0.90, p < 0.05 ), diversity (r = −0.96, p < 0.01 ), and basal area (r = −0.96, p < 0.001 ), whereas mean patch size was strong and negatively influenced species richness (r = 0.95, p < 0.05 ), diversity (r = 0.87, p < 0.05 ), and basal area (r = 0.82, p < 0.05 ). The overall species richness, Shannon diversity index, and Margalef index were significantly higher in the edge habitat; however, the mean basal area of woody species was significantly higher in the interior habitat at p < 0.05 . This study uncovered that the park is floristically rich and diverse, and it provides a variety of ecological and economic benefits to the surrounding community and to the nation at large. However, these benefits are gradually declining due to the high level of anthropogenic activities in the park. Thus, integrated environmental management strategy that blends with sustainable use of natural resources should be implemented to minimize the threats.

Dynamics of Forest Clumps on Chenier Plains, Cobourg Peninsula, Northern Territory

1990 ◽  
Vol 38 (6) ◽  
pp. 593 ◽  
Author(s):  
DMJS Bowman ◽  
WJ Panton ◽  
L Mcdonough
Keyword(s):  
National Park ◽  
Field Experiments ◽  
Calcareous Soils ◽  
Basal Area ◽  
Woody Species ◽  
Acacia Auriculiformis ◽  
Tree Crown ◽  
Bos Javanicus ◽  
Preferred Habitat ◽  
Monsoon Forest

Forest clumps occur scattered throughout Sorghum plumosum grasslands on chenier plains at Gurig National Park, Cobourg Peninsula, a preferred habitat for the introduced banteng (Bos javanicus.). The clumps are dominated by Pandanus spiralis, Acacia auriculiformis, Alstonia actinophylla, Timonius timon and Casuarina equisetifolia and vary in size from the radius of one tree crown to large patches of over several hectares. Fifteen of the 32 woody species recorded in 42 clumps occurred as juveniles less than 1 cm diameter at breast height. Both the clumps and grasslands occur on uniform calcareous soils. The clumps are thought to be a stage in a succession towards monsoon forest. Field experiments showed that seedlings from a range of monsoon forest and savanna species can grow on the plains. Interpretation of aerial photography taken in 1963 and 1982 suggests that the clumps have expanded. Fire is thought to control the succession. A fire on the plains was found to kill between one and two-thirds of the basal area of Pandanus spiralis and A. auriculiformis and stimulated the establishment of six times more A. auriculiformis seedlings than in nearby unburnt clumps. Monsoon forest juveniles that invade the clumps typically resprout following fire. Stunted, fire-damaged monsoon forest species (e.g. Timonius timon, Alstonia actinophylla) occur in low densities in the grasslands. It is unclear whether banteng promotes the succession by reducing fuel loads in the grasslands and spreading A. auriculiforms seeds.

scholarly journals Structure and composition of trees in Mount Tilu Nature Reserve, West Java, Indonesia

2020 ◽  
Vol 21 (6) ◽  
Author(s):  
Tri Cahyanto ◽  
Muhammad Efendi ◽  
DIAN MUHAMAD RAMDAN
Keyword(s):  
Tree Species ◽  
Nature Reserve ◽  
Basal Area ◽  
Principal Component ◽  
Floristic Composition ◽  
Diversity Indices ◽  
Species Structure ◽  
West Java ◽  
Conservation Area ◽  
Regeneration Status

Abstract. Cahyanto T, Efendi M, Ramdan DM. 2020. Structure and composition of trees in Mount Tilu Nature Reserve, West Java, Indonesia. Biodiversitas 21: 2674-2680. An understanding of the structure and composition of stands in a conservation area is needed to support sustainable management strategy. However, this information in the Mount Tilu Nature Reserve, Bandung District, West Java area is still lacking. This research was aimed to analyze the structure and composition of tree species in the block of Malagembol forest, Mt. Tilu NR. Data collection was carried out through vegetation analysis using sampling plot method with size of 10x100 m2 at three-level altitudes of 1530 m, 1745 m, and 1950 m asl. Observation parameters included species names, number of individuals, and diameter at breast height (dbh). Data were analyzed to determine the floristic composition, species structure based on their diameter class, relative basal area, diversity indices, and analysis of the importance of the main components of trees species through Principal Component Analysis (PCA). A total of 32 tree species from 23 families was found in the observation plots which was dominated by Fagaceae, Lauraceae, and Myrtaceae families. Some pioneer plants covered the gap in vegetation due to minor disturbance and residual damage in the past. Nonetheless, the dominance of stands with small diameters indicated good regeneration status following such disturbance. Based on these findings, we recommend protecting the vegetation in Mt. Tilu NR by limiting community activities that can disturb the forest.

scholarly journals DYNAMICS OF WOODY SPECIES IN DRY TROPICAL FOREST (CAATINGA), BRAZIL

FLORESTA ◽  
2020 ◽  
Vol 51 (1) ◽  
pp. 154
Author(s):  
Thyêgo Nunes Alves Barreto ◽  
Rinaldo Luiz Caraciolo Ferreira ◽  
José Antônio Aleixo Silva ◽  
Cleuma Christir da silva Almeida ◽  
Andréa de Vasconcelos Freitas Pinto
Keyword(s):  
Tropical Forest ◽  
Basal Area ◽  
Floristic Composition ◽  
Woody Species ◽  
Shannon Index ◽  
Permanent Plots ◽  
Importance Value ◽  
Sustainability Strategies ◽  
History Of ◽  
History Of Use

Studying selected floristic changes in dry forests is fundamental to foster conservation and sustainability strategies. Objective: to analyze the occurrence of woody species in a tropical forest with a history of use. In 2008, 40 permanent plots were installed and wood with a circumference of 1.30 m at a breast height (CAP) ≥ 6 cm were measured. In 2012, newly established individuals (those that did not meet the size requirements in 2008 but did in 2012) and mortality of the remaining individuals were analyzed by computer. Where applicable, the density, frequency, and absolute dominance, importance value, newly established individuals, mortality, and gross growth for each species, along with the Shannon index were estimated. The floristic composition and diversity remain unchanged. After four years, there were few differences between species, while in most cases the growth in the basal area was positive and sometimes the number of newly established individuals exceeded the mortality. After 24 years of logging, the analyzed forest area did not reach its initial basal area stock when compared to other areas of the Caatinga that do not have a history of disturbance.

scholarly journals Caractéristiques de la flore et de la végétation ligneuses des parcs agroforestiers de l’arrondissement de Tendouck (Basse Casamance, Sénégal)

2020 ◽  
Vol 14 (5) ◽  
pp. 1558-1575
Author(s):  
Ismaila Coly ◽  
Tahirou Charles Diatta ◽  
Daouda Ngom ◽  
Aliou Badji ◽  
Omar Gueye
Keyword(s):  
Basal Area ◽  
Floristic Composition ◽  
Woody Species ◽  
Structural Features ◽  
Shannon Index ◽  
Important Place ◽  
Regeneration Rate ◽  
Height Class ◽  
Base De Données ◽  
Composition Structure

L’agriculture occupe une place très importante dans l’arrondissement de Tendouck. Pour augmenter leurs rendements, les agriculteurs laissent délibérément dans leurs champs certaines espèces ligneuses. Cette étude a pour objectif général de contribuer à une meilleure connaissance des caractéristiques des parcs agroforestiers du département de Bignona. Pour ce faire, une placette de 2500 m² (50 mx50 m) a été installée dans les champs de chaque agriculteur retenu dans un échantillon de 98 agriculteurs. Cet échantillon est réparti entre les différentes communes de l’arrondissement au prorata de leur poids démographique soit 16 ; 21 ; 22 ; 30 et 9 placettes respectivement dans les communes de Balinghore, Diégoune, Kartiack, Mangagoulack et Mlomp. La flore dans l’arrondissement de Tendouck est riche de 53 espèces réparties en 45 genres relevant de 20 familles botaniques. Au niveau de l'arrondissement de Tendouck la densité des arbres des parcs agroforestiers est de 42 pieds/ha, la surface terrière de 3,21 m²/ha et le taux de recouvrement de 18,82%. Ces parcs sont très diversifiés avec un indice de Shannon de 3,91 et un indice de Pielou de 0,79. Le taux de régénération y est très important (88,19%). La structure par classes de hauteur du peuplement ligneux des parcs agroforestiers révèle une prédominance des jeunes individus avec 24,73% des individus appartenant à la classe de hauteur [2-4 m]. La classe de diamètre la plus représentée est [5-20 cm] avec 42, 99% des individus. Ces résultats constituent une base pour une gestion rationnelle et durable de ces écosystèmes en vue de permettre aux agriculteurs de mieux tirer profit de leurs services dans l’arrondissement de Tendouck. Il apparait ainsi judicieux de poursuivre cette étude dans les autres départements de la Basse Casamance en vue de disposer d’une base de données des parcs agroforestiers de cette zone éco géographique.Mots clés: Champs, composition floristique, structure, agriculteurs, caractéristiques structurales   English title: Characteristics of the woody flora and vegetation in the agroforestry parks of the Tendouck district (Lower Casamance, Senegal)Agriculture occupies a very important place in the district of Tendouck. In order to increase their yields, farmers deliberately leave certain woody species in their fields. The general objective of this study is to contribute to a better knowledge of the characteristics of agroforestry parks in the Bignona district. To this end, a 2500 m² (50 mx50 m) plot was installed in the fields of each farmer selected from a sample of 98 farmers. This sample is distributed among the different communes of the district in proportion to their demographic weight, therefore 16; 21; 22; 30 and 9 plots respectively in the communes of Balinghore, Diégoune, Kartiack, Mangagoulack and Mlomp. The flora in the district of Tendouck is rich of 53 species divided into 45 genera belonging to 20 botanical families. At the level of Tendouck district, the density of trees in agroforestry parks is 41.55 trees/ha, the basal area of 3.21 m²/ha and the rate of covering of 18.82%. These parks are very diversified with a Shannon index of 3.91 and a Pielou index of 0.79. The regeneration rate is very high (88.19%). The height class structure of the woody stand in the agroforestry parks reveals a predominance of young individuals with 24.73% of the individuals belonging to the height class [2-4 m]. The most represented diameter class is [5-20 cm] with 42.99% of the individuals. These results provide a basis for rational and sustainable management of these ecosystems with a view to improving the living conditions of farmers in the Tendouck district. It therefore seems advisable to continue this study in the other departments of Lower Casamance in order to have a data of the agroforestry parks of this eco-geographical area.Keywords: Fields, floristic composition, structure, farmers, structural features  

scholarly journals Effects of Landscape Change on Floristic Composition and Structure in the Bale Mountains National Park, Southeastern Ethiopia

2020 ◽  
Author(s):  
Annissa Muhammed ◽  
Eyasu Elias
Keyword(s):  
Species Richness ◽  
Landscape Change ◽  
National Park ◽  
Diversity Index ◽  
Basal Area ◽  
Floristic Composition ◽  
Economic Benefits ◽  
Environmental Data ◽  
Conservation Action ◽  
Shannon Diversity

Abstract BackgroundBale mountains national park (BMNP) is one of the 34 International Biodiversity Hotspots that comprise a variety of life forms. However, it faces a critical challenge from subsistence farming and overgrazing. This study was made to analyze the effects of landscape change on floristic composition, diversity, and structure in BMNP. The vegetation and environmental data were collected from 96 plots that were laid along 8 line transects. Vegetation hierarchical clustering and landscape structural analysis was made using R software version 3.5.2 and FRAGSTATS version 4.2.1, respectively. ResultsA total of 205 species that belongs to 153 genera and 71 families were identified. The overall Shannon diversity and evenness index was 4.34 and 0.81, respectively. Both the species richness and Shannon diversity index were significantly higher (p < 0.05) in the edge habitat (40 ± 0.2 and 2.93 ± 0.2, respectively) than the interior (25 ± 4.5 and 2.43 ± 0.4, respectively). Conversely, the basal area was lower in the interior habitat (173.79 m2 ha-1) than the edge (64.15 m2 ha-1). Moreover, as AREA_MN and COA of patches increases, species richness, diversity, evenness, woody species density, basal area, DBH, and height also increases. Whereas, as PN, SHAPE_MN, ED, ENN_MN, and IJI of patches increases, those floristic compositions and structural variables decrease. ConclusionThis study revealed that BMNP is a biologically diverse and ecologically significant area that provides a variety of ecological and economic benefits to the surrounding communities and the country at large. However, its landscape is changing alarmingly and urgent restoration and conservation action needs to be taken to reverse this condition.

scholarly journals Floristic Composition, Vegetation Structure, and Regeneration Status of Woody Plant Species of Oda Forest of Humbo Carbon Project, Wolaita, Ethiopia

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Markos Kuma ◽  
Simon Shibru
Keyword(s):  
Vegetation Structure ◽  
Woody Plant ◽  
Basal Area ◽  
Floristic Composition ◽  
Woody Species ◽  
Regeneration Status ◽  
Tree Data ◽  
Carbon Project ◽  
Dodonaea Angustifolia ◽  
Conservation And Management

Our current study was conducted in Oda forest to explore floristic composition, vegetation structure, and regeneration of woody species in a newly established Humbo Carbon Project. In the project, the above information for sufficient conservation and management of the forest is not well documented. Data were collected in October and December 2014. Thirty-two quadrats (20 m × 20 m) lying 100 m far apart were used for shrub and tree data. In each major plot, subplots (1 m2) were established at the center and corner for seedlings and saplings data. Altitude, slope, and aspect were measured using GPS and clinometers. DBH, basal area, and IVI were used for vegetation structure. Among 62 species confined in 32 families and 54 genera, Dodonaea angustifolia and Combretum molle were the densest and the most dominant and frequent species with higher IVI. Altitude and slope had significant effect (p<0.0001) on basal area and dominance. Bell and inverted J shaped patterns of selected woody species were identified. The seedling, sapling, and matured tree had 2.3%, 23.7%, and 74% density ha−1 of individuals, respectively. Generally, the study confirmed that very few species had dominance and abundance, influence of altitude and slope on species distribution, and fair regeneration of the forest.

scholarly journals A preliminary report on the dynamics of the vegetation of the Kalahari Gemsbok National Park

Koedoe ◽  
1984 ◽  
Vol 27 (2) ◽  
Author(s):  
N Van Rooyen ◽  
D. J Van Rensburg ◽  
G. K Theron ◽  
J Du P Bothma
Keyword(s):  
Species Composition ◽  
Significant Influence ◽  
Preliminary Report ◽  
National Park ◽  
Floristic Composition ◽  
Woody Species ◽  
Woody Vegetation ◽  
Herbaceous Species ◽  
Short Term ◽  
Basal Cover

Different methods were used intermittently to monitor the changes in the floristic composition, basal cover and density of the herbaceous and woody vegetation over a seven year period in the Kalahari Gemsbok National Park. Periods of drought and the variability of rainfall appear to have a significant influence in the short term on herbaceous species, while there was not much variation in the woody species composition or density.

scholarly journals Woody Species Diversity and Structure of Protected Woodlands Adjacent to Free Grazing Land Woodland at Dugda Woreda, Oromia, Ethiopia

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Tsegu Ereso Denbel
Keyword(s):  
Basal Area ◽  
Floristic Composition ◽  
Woody Species ◽  
Systematic Sampling ◽  
Importance Value Index ◽  
Importance Value ◽  
Mature Trees ◽  
Grazing Land ◽  
Individual Tree ◽  
Breast Height

The study was conducted in protected woodland and free graze woodland located in Dugda Woreda, Oromia state, Ethiopia. The objective of the study was to explore the floristic composition, structure, and regeneration of woody species. In the park, the vegetation ecology has not been studied up to date, which is necessary for conservation. The systematic sampling technique was used to collect vegetation and human disturbance (presence and absence) data from August to December 2017. The vegetation data were collected from 30 plots from each woodland with a size of 900 m2 (30 m × 300 m) for tree/shrub, while subplots of size 400 m2 (20 m × 20 m) for sapling, respectively, were established in the main plots. Individual tree and shrub diameters at breast height (DBH) ≥2.5 cm and height ≥ 2 m were measured using a tape meter and clinometer, respectively. Diameter at breast height (DBH), frequency, density, basal area, and importance value index (IVI) were used for vegetation structure description, while the densities of mature trees, sapling, and seedling were used for regeneration. A total of 446 individual stems from free grazed woodland and 641 individual stems from protected woodland with a DBH of ≥2.5 cm were encountered from 30 studied sample plots that are protected and free grazed woodlands. Of these, from the total woody species, 68.42% were trees and 31.57% shrubs found in protected woodland; 76.92% were trees and 23.07% shrubs found in free grazed woodland. The total basal area of the woody plant was 3.1 ± 1 m2/ha in free grazed woodland and 4.2 ± 2 m2/ha in protected woodland, calculated for 19 woody species. Fabaceae, Balanitaceae, Capparidaceae, Verbenaceae, and Boraginaceae families were the most abundant families in both woodlands. However, there is a good initiation for the conservation of the park; still, the vegetation of the park was threatened by human-induced fire following intensive farming, gold mining, and overgrazing.

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