scholarly journals Assessment of land-cover changes and carbon sequestration potentials of tree species in j4 section of Omo Forest Reserve, Ogun State, Nigeria

2020 ◽  
Vol 22 (1) ◽  
pp. 137-152
Author(s):  
A.A. Adeyemi ◽  
S.O. Adeleke
Keyword(s):  
Tree Species ◽  
Carbon Stock ◽  
Forest Type ◽  
Stand Density ◽  
Tectona Grandis ◽  
Natural Forest ◽  
Gmelina Arborea ◽  
Pinus Caribaea ◽  
Forest Reserve ◽  
Nauclea Diderrichii

We evaluated carbon stock accumulation on potential of tree species in five forest-types in Omo Forest Reserve of western Nigeria. This included four forest plantations and a natural forest of mixed species. The reserve was stratified into Gmelina arborea, Tectona grandis, Pinus carebeae and Nauclea diderrichii plantations as well as natural forest. Each forest-type was assessed using circular plot method. Plot points were pre-determined using remote sensing. For each point, two circular plots were established, the main plot with a radius of 12.61 m (500 m2 ) and the subplot with a radius of 5.64 m (100 m2 ). In each plot, tree Dbh and height were measured for trees with Dbh ≥10 cm, while only trees with Dbh <10 cm but >2 cm (i.e. 2 cm ≤ Dbh < 10 cm) were considered in the sub-plot. Soil samples were also collected at 10 locations with 2 each in the north, south, east, west and at the plot centre, in each forest-type. The samples were analysed to obtain soil organic carbon. Above- and belowground biomass and carbon stocks were estimated using the appropriate allometries formulated for the tropics. All empirical relationships were included in the existing allometries with Dbh and height as predictors. Landsat images of the reserve in 1991, 2000, 2014 and 2019 were processed and analysed to assess forest degradation. The results revealed that 23-year-old Pinus caribaea plantation  sequestered more carbon (35.78±2.73 tons/ha) than 35-year-old Gmelina arborea (18.96±1.82 tons/ha), 43-year-old Tectona grandis (17.75±2.13 tons/ha) and 43-year-old Nauclea diderrichii (17.36±1.87 tons/ha) plantations and natural forest (21.98±2.38 tons/ha). The study showed that stand density influences carbon stock accumulation of forest. It was observed that individual stems of Pinus caribaea were better carbon accumulators than Gmelina arborea, Tectona gransdis and Nauclea diderrichii. The same trend was observed for CO2 captures as Pinus caribaea captured 131.31±10.02 tons/ha with Nauclea diderrichii the least, having a value of 63.71±6.9 tons/ha. Keywords: Biomass, Carbon stock, Degradation, Forest-type, Stand density

Role of Forest Tree Species in the Carbon Storage of the Kaptai National Park, Bangladesh

2021 ◽  
Vol 50 (2) ◽  
pp. 365-371
Author(s):  
Mohammed Mukhlesur Rahman ◽  
Syed Hafizur Rahman ◽  
Mohammed Al Amin
Keyword(s):  
Carbon Storage ◽  
Tree Species ◽  
National Park ◽  
Carbon Stock ◽  
Tectona Grandis ◽  
Forest Tree ◽  
Carbon Stocks ◽  
Acacia Auriculiformis ◽  
Gmelina Arborea

The study was conducted to estimate the biomass and carbon stock in the dominant tree species of the Kaptai National Park of Bangladesh. A total of 77 tracks and 308 plots were selected and all trees in each plot were measured to estimate the biomass following allometric equations. There were planted stand of Acacia auriculiformis, Dipterocarpus turbinatus, Gmelina arborea, Lagerstroemia speciosa, Swietenia macrophylla and Tectona grandis. Biomass and carbon stocks of these corresponding tree species were 35.03, 73.86, 23.52, 30.16, 44.49, and 42.67 mg/ha. The highest carbon stock per tree was in D. turbinatus (372.19 kg C/tree), followed by S. macrophylla (226.49 kg C/tree), T. grandis (215.06 kg C/tree), A. auriculiformis (176.56 kg C/tree), L. speciosa (151.19 kg C/tree) and G. arborea (118.54 kg C/tree), respectively. The findings of the study will be helpful for the estimation of carbon stocks in the forests of Bangladesh. Bangladesh J. Bot. 50(2): 365-371, 2021 (June)

scholarly journals Fitting Linear and Non Linear Growth Models for Selected Plantations in Omo Forest Reserve Southwestern Nigeria

2020 ◽  
pp. 19-29
Author(s):  
E. T. Adedeji ◽  
A. S. Akinbowale ◽  
O. A. Akinbode
Keyword(s):  
Linear Models ◽  
Tectona Grandis ◽  
Pinus Caribaea ◽  
Southwestern Nigeria ◽  
Forest Reserve ◽  
Diameter At Breast Height ◽  
Breast Height ◽  
Non Linear ◽  
Nauclea Diderrichii ◽  
The Relationship

This study was conducted to assess the suitability of forest models in Tectona grandis, Pinus caribaea and Nauclea diderrichii stands at Omo forest reserve, Ijebu East, Ogun State, Southwestern Nigeria. Temporary sample plots of equal size (25 m x 25 m) were laid while complete enumeration were carried out in each sampled plot and tree growth variables such as diameter at breast height (dbh), diameter at the top (dt), diameter at the middle (dm) and diameter at the base (db) as well as total height of all trees were measured. Simple linear models and six non linear models were developed and assessed for the selected plantation. The linear model developed _ R-squared ranged from 77% to 93%. The least R- square was obtained in Tectona grandis plantation and the highest was obtained in 93% Pinus caribaea. All the models have high F values ranging from 234.71 to 2965.40. In Tectona grandis plantation, Logistic power model, gave a good fit in describing the relationship between diameter at breast height and volume with AICC values of -2368.92, 0.22 each. The Sigmond models that gave a good fit in describing the relationship between the diameter at breast height and volume in Pinus caribaea were Weibull model (-719.19, 0.09) while Gompertz relation is the best for Nauclea diderrichii, respectively. The various models generated in the study are highly recommended for use in estimating the growth characteristics of the plantation in the future.

Tree diversity and natural regeneration in Tropical Dry Deciduous Forest of Panna Tiger Reserve, India

2021 ◽  
Author(s):  
Talat Parveen ◽  
Orus Ilyas
Keyword(s):  
Species Diversity ◽  
Tree Species ◽  
Deciduous Forest ◽  
Basal Area ◽  
Stand Density ◽  
Tectona Grandis ◽  
Aegle Marmelos ◽  
Tree Stand ◽  
Tiger Reserve ◽  
Dry Deciduous Forest

Abstract The disturbance is a major factor driving the decline of tropical forests and their associated fauna. Henceforth, basic information on species diversity would be useful for assessing the success of management in the fragmented and human-disturbed landscape. We accounted for tree species diversity and their regeneration pattern from the tropical dry deciduous forest of Panna Tiger Reserve (PTR), India. Considering this, random vegetation sampling along with transects was carried out in different ranges of PTR. It is spread over in an area of 2998.98 km2 that situated in the northern part of Madhya Pradesh and distributed in Panna and Chhatarpur district. The tropical dry deciduous forest inventory in the 10.6132-ha area yielded a total of 46 woody species of > 10 cm GBH, belonged to 23 Families and 40 genera. The regeneration represented 27 species of < 30 cm height (seedling) under 16 families and 24 genera while sapling, which ranges from > 30cm to 1.3m, showed 24 species of 13 families and 32 genera. The Shannon diversity of Trees, seedlings, and saplings was 2.684, 2.525, and 2.401 respectively. A total stand density and basal area of 2391 stems of trees were estimated as 225.285 stand ha− 1 and 90.016 m2ha− 1 respectively. Tectona grandis scored the highest IVI value of 59.44 (19.81% of total IVI for all species) among the dominated tree species, followed by Acacia catechu (24.94), Abrus precatorius (23.25), Zizyphus xylopyra (22.94), Anogeissus latifolia (22.16) and Lagerstroemia parviflora (22.18). Nearly 23.913% of the total number of species was recorded as rare species. The highest seedling density was obtained for Diospyros melanoxylon followed by Zizyphus xylopyra, Aegle marmelos, Wrightia tintoria, and Tectona grandis, which declined in the subsequent sapling stage and showed a reverse pattern. Hence, the highest sapling density was recorded for Tectona grandis then Aegle marmelos, Wrightia tintoria, Diospyros melanoxylon, and Zizyphus xylopyra. A total of 36.956% of tree species were found to fail to establish in the community because species were represented by only adult or tree stage that listed as Not-regenerating. In terms of the most diverse family among the plant categories; viz. Tree, Seedling, Sapling, Fabaceae had the highest species richness. The highest tree stand density (127.576 stand ha− 1) was recorded in the girth class of 31-60cm (48.687% of the total tree stand density) followed by 10-30cm and 61-90cm. Likewise, a total basal area of 20.824 m2ha− 1 was occupied by 31-60cm that contributed 23.051% of the total basal area, so our data on the population structure of forest shows a similar trend wherein the distribution curve exponentially decreases with increasing girth classes that indicates not only a mid-successional forest but also a human-disturbed.

scholarly journals Fluxes in litter decomposition in three selected indigenous species and teak in a converted rainforest ecosystem in southwestern Nigeria

2012 ◽  
Vol 47 (3) ◽  
pp. 333-338
Author(s):  
AF Ojo ◽  
O Kadeba ◽  
J Kayode
Keyword(s):  
Litter Decomposition ◽  
Tree Species ◽  
Soil Nutrient ◽  
Tectona Grandis ◽  
Indigenous Species ◽  
Southwestern Nigeria ◽  
Forest Reserve ◽  
Nutrient Pool ◽  
Indigenous Tree Species ◽  
Litter Nutrients

The study investigated the rate of litter decomposition in three prominent litter releasing indigenous tree species in the natural rainforest and an exotic species Teak, Tectona grandis Lim., in the adjacent plantation in Akure forest reserve, southwestern Nigeria. Results showed that teak had the highest litter decomposition rate and Mansonia altissima the least. There was no relationship between the rates of decomposition among all species examined. The implication is that teak litter had the highest probability of releasing litter nutrients into the soil nutrient pool than any of the selected indigenous tree species while Mansonia altissima had the least. However all species had high decomposition rates. This implies that soil fertility will be maintained if any of the tree species were to be used for monoculture plantations. DOI: http://dx.doi.org/10.3329/bjsir.v47i3.13069 Bangladesh J. Sci. Ind. Res. 47(3), 333-338 2012

Canopy knockdown of arthropods in exotic plantations and natural forest in Sabah, north-east Borneo, using insecticidal mist-blowing

1998 ◽  
Vol 88 (1) ◽  
pp. 15-24 ◽  
Author(s):  
V.K. Chey ◽  
J.D. Holloway ◽  
C. Hambler ◽  
M.R. Speight
Keyword(s):  
Tree Species ◽  
Secondary Forest ◽  
Acacia Mangium ◽  
Natural Forest ◽  
Pinus Caribaea ◽  
North East ◽  
Arthropod Species ◽  
Exotic Tree ◽  
Arthropod Biodiversity ◽  
One Year

AbstractCanopy knockdown of arthropods using mist-blowing was carried out in Brumas, Sabah (north-east Borneo), in plantations of exotic (non-indigenous) tree species (Acacia mangium, Eucalyptus deglupta, Gmelina arborea, Paraserianthes [=Albizia] falcataria, and Pinus caribaea), plus secondary natural forest and dense understorey within E. deglupta stands. Each habitat had three 1 m2 samples taken four times in one year. The average arthropod species richness within the stands of the exotic tree species ranged from 27 in E. deglupta, to 68 in natural, secondary forest. The total number of individuals caught ranged from 137 in G. arborea to 1628 in secondary forest. The dense and plant-species rich understorey within E. deglupta stands yielded both higher numbers of species and individuals than the eucalypt trees themselves, indicating the importance of allowing the development of a luxuriant understorey for the enhancement of conservation and biodiversity. Though arthropod biodiversity is reduced by the conversion of tropical forests to plantations, abundance and richness are still substantial in the latter habitats.

scholarly journals Quantitative assessment of tree species diversity of Himchari National Park (HNP) in Cox’s Bazar, Bangladesh

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Saddam Hossen ◽  
Mohammed Kamal Hossain ◽  
Md. Akhter Hossain ◽  
Mohammad Fahim Uddin
Keyword(s):  
Species Diversity ◽  
Tree Species ◽  
National Park ◽  
Quantitative Assessment ◽  
Diversity Index ◽  
Tectona Grandis ◽  
The Other ◽  
Acacia Auriculiformis ◽  
Tree Species Diversity ◽  
Gmelina Arborea

Abstract. Hossen S, Hossain MK, Hossain MA, Uddin MF. 2020. Quantitative assessment of tree species diversity of Himchari National Park (HNP) in Cox’s Bazar, Bangladesh. Asian J For 5: 1-7. The aim of the study was to assess the tree species composition, dominance, and quantitative distribution of tree species of Himchari National Park, Cox’s Bazar in Bangladesh through stratified random sampling method using sample plots (51) of 20 m x 20 m in size during the period of January 2017 to May 2018. A total of 961 stems (dbh ≥ 5 cm) of 88 tree species belonging to 64 genera and 37 families were enumerated where the stem density and basal area were 457.39 stem ha-1 and 10.979 m2 ha-1 respectively. On the other hand, the species diversity index, Shannon-Wiener’s diversity index, Shannon’s maximum diversity index, species evenness index, Margalef’s diversity index, and Simpson’s diversity index were 0.092, 3.733 ± 0.0071, 4.477, 0.834, 12.667 and 0.039 ± 0.0003 respectively. The highest Importance Value Index (IVI) was found for Acacia auriculiformis (23.23) followed by Tectona grandis (13.05), Gmelina arborea (12.66), Syzygium fruticosum (12.34), Casuarina equisetifolia (10.57), and Dipterocarpus turbinatus (10.55). The IVI value represents that Acacia auriculiformis possess highest dominance that is followed by Tectona grandis and Gmelina arborea. Percentage distribution of tree individuals into different height classes found in quadrats showed that height range 3 - <8 m had the highest (59.83%) percentage of tree individuals. On the other hand, different dbh (having dbh ≥5 cm) classes showed that most of the trees (65.97%) belonged to dbh range 5 - <15 cm. The outcome of present study suggests for the protection, sustainable management, and conservation of the tree resources of HNP, Cox’s Bazar, Bangladesh.

scholarly journals ZONEAMENTO ECOLÓGICO DE PEQUENA ESCALA PARA ESPÉCIES FLORESTAIS TRADICIONAIS NO DISTRITO FEDERAL

FLORESTA ◽  
2012 ◽  
Vol 42 (2) ◽  
pp. 421 ◽  
Author(s):  
Raquel Fernandes De Araujo ◽  
Eraldo Aparecido Trondoli Matricardi ◽  
Mauro Eloi Nappo
Keyword(s):  
Tree Species ◽  
Hevea Brasiliensis ◽  
Eucalyptus Camaldulensis ◽  
Tectona Grandis ◽  
Eucalyptus Citriodora ◽  
Pinus Caribaea ◽  
Distrito Federal ◽  
Eucalyptus Camaldulensis Dehnh ◽  
Corymbia Citriodora ◽  
Pinus Caribaea Morelet

Neste estudo foram analisadas variáveis biofísicas para definir áreas potenciais para o plantio de espécies florestais tradicionais no território do Distrito Federal. As espécies testadas foram Pinus caribaea Morelet var. caribaea, P. caribaea Morelet var. hondurensis (Sénécl.) W. H. G. Barrett & Golfari, P. caribaea Morelet var. bahamensis (Griseb.) W. H. G. Barrett & Golfari, P. elliottii Engelm. var. elliottii, Eucalyptus camaldulensis Dehnh., E. urophylla S. T. Blake, E. grandis W. Hill, Corymbia citriodora (Hook.) K. D. Hill & L. A. S. Johnson (ex Eucalyptus citriodora), C. torelliana (F. Muell.) K. D. Hill & L. A. S. Johnson (ex Eucalyptus torelliana), Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg.e Tectona grandis L. f. Para identificar as áreas aptas para a implantação dos povoamentos florestais, foi realizada a sobreposição de variáveis do meio físico do Distrito Federal com variáveis relacionadas às exigências adaptativas de cada espécie estudada. Com base nos resultados desta pesquisa, as espécies que apresentaram potencial para cultivo nas condições físicas do Distrito Federal foram as três variedades de Pinus caribaea, P. elliottii var. elliottii, Eucalyptus camaldulensis, E. urophylla, E. grandis e Corymbia citriodora. As espécies Corymbia torelliana, Hevea brasiliensis e Tectona grandis não apresentaram potencial para o cultivo.Palavras-chave:Silvicultura; sistema de informação geográfica. AbstractSmall scale ecological zoning of Distrito Federal, Brazil, for traditional forest species. This study evaluated biophysical variables to identify suitable areas of the Distrito Federal for planting traditional tree species. The studied tree species included Pinus caribaea Morelet var. caribaea, P. caribaea Morelet var. hondurensis (Sénécl.) W. H. G. Barrett & Golfari, P. caribaea Morelet var. bahamensis (Griseb.) W. H. G. Barrett & Golfari, P. elliottii Engelm. var. elliottii, Eucalyptus camaldulensis Dehnh., E. urophylla S. T. Blake,  E. grandis W. Hill, Corymbia citriodora (Hook.) K. D. Hill & L. A. S. Johnson (ex Eucalyptus citriodora), C. torelliana (F. Muell.) K. D. Hill & L. A. S. Johnson (ex Eucalyptus torelliana), Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg. and Tectona grandis L. f.Suitable areas for the studied tree species were identified by overlapping biophysical variables of the Distrito Federal, wich included adaptive tree requirements and site characteristics.Based on this research results, the territory of the study area is suitable for cultivation of three varieties of Pinus caribaea, P. elliottii var. elliottii, Eucalyptus camaldulensis, E. urophylla, E. grandis and Corymbia citriodora. There were no suitable areas for cultivation of Corymbia torelliana, Hevea brasiliensis and Tectona grandis.Keywords: Silviculture; geographic information system.

Forest diversity as a factor influencing Engelmann spruce resistance to beetle outbreaks

2014 ◽  
Vol 44 (11) ◽  
pp. 1369-1375 ◽  
Author(s):  
Lafe G. Conner ◽  
Michael C. Bunnell ◽  
Richard A. Gill
Keyword(s):  
Populus Tremuloides ◽  
Tree Species ◽  
Forest Type ◽  
Stand Density ◽  
Douglas Fir ◽  
Tree Diversity ◽  
Phylogenetic Distance ◽  
Associational Resistance ◽  
Engelmann Spruce ◽  
White Fir

Tree mortality because of beetle outbreaks has become substantial and widespread in conifer forests in western North America. A number of environmental and physiological factors influence patterns of mortality. Tree diversity may reduce the severity and extent of insect damage to host trees by providing associational resistance, but the existence and importance of associational resistance varies by forest type and by tree and insect species. We assessed whether plot-level tree diversity contributed to survival of Engelmann spruce (Picea engelmannii Parry ex Engelm.) following a spruce beetle (Dendroctonus rufipennis Kirby) epidemic. Our study plots comprised 2 to 5 tree species including Engelmann spruce, subalpine fir (Abies lasiocarpa (Hook) Nutt.), Douglas-fir (Pseudostuga menziesii (Mirb.) Franco), quaking aspen (Populus tremuloides Michx.), and white fir (Abies concolor (Gordon & Glend.) Hildebr.). We used a model-selection analysis to compare the importance of tree diversity with other known factors that influence spruce survival. We found lower rates of spruce survival in stands where spruce was the dominant tree species (by percent of stand density index) and higher survival in stands where nonspruce conifers (Douglas-fir, subalpine, and white fir) were dominant. We also found that tree diversity (Shannon index) did not show a positive correlation to spruce survival and that there was no additional benefit derived from the presence of aspen, which has higher phylogenetic distance from Engelmann spruce than the other trees in this study. The relationship between diversity and survival is complicated by factors that naturally co-vary with diversity, such as elevation, aspect, and stand density of spruce. Our results best support an explanation that if associational resistance does increase spruce survival during a beetle epidemic, it is due to host or resource dilution, which may be an indirect effect of higher stand diversity.

scholarly journals Native tree species diversity of Rampahar Natural Forest Reserve in Rangamati South Forest Division, Bangladesh

2018 ◽  
Vol 47 (2) ◽  
pp. 129 ◽  
Author(s):  
Bishwajit Chowdhury ◽  
Mohammed Kamal Hossain ◽  
Md. Akhter Hossain ◽  
Bayezid Mahmud Khan
Keyword(s):  
Species Diversity ◽  
Tree Species ◽  
Natural Forest ◽  
Tree Species Diversity ◽  
Forest Reserve ◽  
Native Tree ◽  
Forest Division ◽  
Native Tree Species
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