scholarly journals Allometric equations to estimate the above-ground biomass of trees in the tropical secondary forests of different ages

2019 ◽  
Vol 20 (9) ◽  
Author(s):  
Karyati Karyati ◽  
ISA B. IPOR ◽  
ISMAIL JUSOH ◽  
MOHD. EFFENDI WASLI
Keyword(s):  
Secondary Forest ◽  
Floristic Composition ◽  
Allometric Equations ◽  
Secondary Forests ◽  
Strong Correlations ◽  
Above Ground Biomass ◽  
Ground Biomass ◽  
Dry Biomass ◽  
Different Ages ◽  
Tropical Secondary Forest

Abstract. Karyati, Ipor IB, Jusoh I, Wasli ME. 2019. Allometric equations to estimate the above-ground biomass of trees in the tropical secondary forests of different ages. Biodiversitas 20: 2427-2436. The allometric equations for trees of secondary forests of different ages in abandoned lands after shifting cultivation are still rarely available. The objective of this study was to develop allometric equations to estimate the above-ground biomass (AGB) of trees (DBH of > 5 cm) in the tropical secondary forest of different ages, namely 5, 10, and 20 years after abandonment. The selected trees in this study represented the dominant and rare species and DBH classes in each study site. The trunk dry biomass and AGB showed strong correlations (adjusted R2= 0.59-0.95) with diameter at breast height (DBH) and height. The leaf and branch dry biomass had weak correlations with height (adjusted R2=0.36-0.50). The developed allometric equations were suitable for trees of secondary forests of different ages, because the selected samples used in the destructive method were based on a field inventory data of forest structure and floristic composition.

scholarly journals Tree stand floristic dynamics in secondary forests of different ages in Sarawak, Malaysia

2018 ◽  
Vol 19 (3) ◽  
pp. 717-723 ◽  
Author(s):  
KARYATI KARYATI ◽  
ISA B. IPOR ◽  
ISMAIL JUSOH ◽  
MOHD. EFFENDI WASLI
Keyword(s):  
Stand Structure ◽  
Secondary Forest ◽  
Basal Area ◽  
Floristic Composition ◽  
Common Species ◽  
Secondary Forests ◽  
Tree Stand ◽  
Importance Value Index ◽  
Importance Value ◽  
Different Ages

Karyati, Ipor IB, Jusoh I, Wasli ME. 2018. Tree stand floristic dynamics in secondary forests of different ages in Sarawak, Malaysia. Biodiversitas 19: 717-723. Succession is a series sequential processes of the development of floristic community which involves changes in community structure, species composition and diversity over time. The information on tree stand floristic dynamics of various stages of succession in secondary forests in Malaysia is currently lacking. This study was conducted to determine tree stand structure, floristic composition, and species diversity in various stages of secondary forest development in the study areas. A total of 997, 1,842, and 834 tree stems with diameter at breast height (DBH) of > 5 cm were recorded in one-hectare-plots of 5, 10, and 20 year old secondary forests, respectively. The ten most common species in 5 and 10 year old of secondary forests consisted mostly of light demanding species. In the 20 year old secondary forest, these species did not exist. Macaranga gigantea was the most dominant tree species in the 5 and 10 year old secondary forests in terms of basal area and volume per hectare. The most common species, based on density, basal area, volume, and Importance Value Index (IVi), in the 20 year old secondary forest was Adinandra dumosa. The diversity and richness indices of the 10 year old secondary forest were the highest among all study sites.

scholarly journals BIOMASSA E FLORÍSTICA EM FLORESTAS SECUNDÁRIAS DE DIFERENTES IDADES

FLORESTA ◽  
2011 ◽  
Vol 41 (1) ◽  
Author(s):  
Maria Elizabete de Oliveira
Keyword(s):  
Secondary Succession ◽  
Secondary Forest ◽  
Floristic Composition ◽  
Dry Mass ◽  
Total Biomass ◽  
Secondary Forests ◽  
Herbaceous Species ◽  
Floristic Survey ◽  
Union County ◽  
Different Ages

Este trabalho foi desenvolvido no município de União, PI, localizado na região centro-norte do estado, e tem como objetivo determinar a produção de biomassa e a composição florística em matas secundárias com diferentes idades após o cultivo agrícola tradicional (um, três e cinco anos de pousio, com dois tratamentos para cada idade). Para análise da vegetação, foram estabelecidas 20 parcelas em cada idade de pousio. Para levantamento das espécies arbóreas/arbustivas, foram usadas parcelas com 25 m² e, dentro destas, subparcelas com 2,0 m² para as espécies herbáceas. Os resultados mostram 100 espécies ocorrentes nas áreas, sendo 42 de porte arbustivo/arbóreo e 58 herbáceas. As capoeiras com um, três e cinco anos apresentaram, respectivamente, 3,4; 6,0 e 6,7 ton.ha-1 de massa seca. Palavras-chave: Sucessão secundária; pousio; massa seca; levantamento florístico. AbstractBiomass production and floristic of secondary forestsof different ages. This study was developed in the Union county, localized in center-north region of the Piaui State, and aim to determine the production of biomass and floristic composition of secondary forests with different ages after slash and burn agriculture (one, three and five years-old regeneration stages, with two replicates). For analysis of vegetation they were established 20 plots by each different age of fallow. Plots were used with areas of 25.0 m2 by shrub/tree and, within these, subplots with 2.0 m² were allocated for the herbaceous species. The results show that 100 species occur in the area, 42 shrubs and 58 herbaceous species; the secondary forest with one, three and five years present total biomass of 3.4; 6.0 and 6.7 ton ha-1 of total dry mass per hectare, respectively.Keywords: Secondary succession; fallow; dry mass; floristic survey; frequency.

Development of allometric relationships for accurate estimation of above- and below-ground biomass in tropical secondary forests in Sarawak, Malaysia

2009 ◽  
Vol 25 (4) ◽  
pp. 371-386 ◽  
Author(s):  
Tanaka Kenzo ◽  
Tomoaki Ichie ◽  
Daisuke Hattori ◽  
Takao Itioka ◽  
Chihiro Handa ◽  
...  
Keyword(s):  
Secondary Forest ◽  
Tree Height ◽  
Plant Part ◽  
Allometric Equations ◽  
Accurate Estimation ◽  
Biomass Estimation ◽  
Secondary Forests ◽  
Allometric Relationships ◽  
Ground Biomass ◽  
Below Ground

Abstract:We developed allometric relationships between tree size parameters (stem diameter at breast height (dbh), at ground surface (D0) and tree height) and leaf, stem, small-root (diameter <5 mm) and total root biomass in various tropical secondary-forest trees in Sarawak, Malaysia. In total, 136 individuals from 23 species were harvested to measure above-ground parts. Root systems of 77 individuals of 16 species were also excavated. The coefficients of correlation for the obtained allometric relationships between tree diameter and plant-part biomass showed high values, ranging from 0.83 to 0.99. In addition, there were few interspecific differences in relationships for all biomass parts, except for leaves. We also found relatively high coefficients of allometric relationships between tree height and plant-part biomass ranging from 0.83 to 0.94. Comparison of above- and below-ground biomass equations for various tropical rainforests implies that our allometric equations differ largely from the equations for tropical primary forests. Thus, choosing both above- and below-ground allometric equations for biomass estimation in tropical secondary forests of South-East Asia requires careful consideration of their suitability.

scholarly journals Modeling of Above Ground Biomass for Selected Indigenous Acacia Species in Omo-Gibe Woodland Ecosystem, South Western Ethiopia

2018 ◽  
Author(s):  
Abreham Berta Aneseyee ◽  
Teshome Soromessa ◽  
Eyasu Elias
Keyword(s):  
Performance Analysis ◽  
Information Criteria ◽  
Allometric Equations ◽  
Above Ground Biomass ◽  
Generalized Model ◽  
Acacia Species ◽  
Ground Biomass ◽  
Biomass Models ◽  
Dry Biomass ◽  
Species Specific

Allometric equations are used to estimate accurate biomass and carbon stock of forests. However, in Ethiopia only few allometric equations as compared to its floral diversity and species-specific allometric equations for Acacia species are still not developed in Ethiopia. The numbers of tree marked for sampling are Fifty-four (54) using preferential sampling. Diameter at breast height, wood density and tree height were collected as independent variables to predict species specific dry biomass of Acacia species. The new species-specific allometric models have been performed using linear regression analysis in the R software. The Above ground biomass (AGB) have been validated using quantitative statically using the pantropic model. Six candidate models have been developed for each species and four best models for each species of dry biomass was selected based on goodness-of-fit statistics and equation performance analysis of the candidate models. The best model for predicting above ground biomass for Acacia seyal is 0.20636*((DBH2)H&rho;) 0.53167, for Acacia polyacantha is &nbsp;7.26982((DBH)2H&rho;)0.21750, for &nbsp;Acacia ethibcia is 29.01898*((DBH)2H&rho;)0.21518 and&nbsp; for Acacia toritolis is&nbsp; 3.82427*((DBH)2H&rho;)0.16748. &nbsp;The selected models are the best performing (P&gt; 0.01) and higher adjusted R2 (&gt;80%) and has lower Akaike&rsquo;s Information Criteria (AIC) and residual standard error (RSE) values as comparing the rest of the model. The validation of new developed biomass model using Tukey test indicated that significant variation of mean biomass (P&lt;0.05) between the new developed model and the generalized model. The statistics model performance analysis of Nash-Sutcliffe efficiency (NSE) value is approaching to one, indicating that the new developed model has better performance model as compared with generalized model. Moreover, the percent bias of the new developed models is close to zero which indicates that the site-specific biomass models have more accurate estimator and the generalized biomass models have overestimated biomass for the four Acacia species.

Allometric equations for accurate estimation of above-ground biomass in logged-over tropical rainforests in Sarawak, Malaysia

2009 ◽  
Vol 14 (6) ◽  
pp. 365-372 ◽  
Author(s):  
Tanaka Kenzo ◽  
Ryo Furutani ◽  
Daisuke Hattori ◽  
Joseph Jawa Kendawang ◽  
Sota Tanaka ◽  
...  
Keyword(s):  
Allometric Equations ◽  
Tropical Rainforests ◽  
Accurate Estimation ◽  
Above Ground Biomass ◽  
Ground Biomass

scholarly journals Biomass of dwarf pine in the Orlické hory Mountains

Beskydy ◽  
2012 ◽  
Vol 5 (2) ◽  
pp. 181-186
Author(s):  
D. Dušek ◽  
J. Novák ◽  
D. Kacálek ◽  
M. Slodičák
Keyword(s):  
Root Biomass ◽  
Above Ground Biomass ◽  
Main Root ◽  
Clear Cut ◽  
Ground Biomass ◽  
Dry Biomass ◽  
Destructive Analysis ◽  
Biomass Sample

In order to evaluate weight and nutrients content in dwarf pine biomass, sample trees were taken for destructive analysis in the formerly air-polluted Orlické Hory Mountains. Investigated stand of dwarf pine was planted in 1988–1989 within clear-cut at elevation 1060–1110 m (NW aspect, Sorbeto - Piceetum). Totally 29,000 kg.ha-1 of dry biomass was accumulated in the stand. Above-ground biomass accounts for 27,000 kg (needles 8,000 kg and wood 19,000 kg) and main root biomass represents ca 2,000 kg.ha-1. The biomass of dwarf pine stand contained following amounts of nutrients per hectare: 153 kg of Nitrogen (from this 64 % in needles, 27 % in wood and 8 % in roots), 14.5 kg of Phosphorus (52 % in needles), 46 kg of Potassium (52 % in needles), 22 kg of Calcium (45 % in needles) and 15 kg of Magnesium (40 % in needles and 44 % in wood).

Allometric relationships and community biomass estimates for some dominant eucalypts in Central Queensland woodlands

2000 ◽  
Vol 48 (6) ◽  
pp. 707 ◽  
Author(s):  
W. H. Burrows ◽  
M. B. Hoffmann ◽  
J. F. Compton ◽  
P. V. Back ◽  
L. J. Tait
Keyword(s):  
Basal Area ◽  
Carbon Stocks ◽  
Allometric Equations ◽  
Allometric Relationships ◽  
Above Ground Biomass ◽  
Greenhouse Gas Inventory ◽  
Individual Tree ◽  
Ground Biomass ◽  
Eucalyptus Crebra ◽  
The Mean

Allometric equations are presented relating stem circumference to branch, leaf, trunk, bark, total above-ground and lignotuber biomass for Eucalyptus crebra F.Muell. (woodland trees), E. melanophloia Sol. Ex Gaerth. (both woodland and regrowth community trees) and E. populnea F.Muell. (woodland trees). There were no significant differences (P > 0.05) between the slopes of individual lognormal regression lines plotting stem circumference against total above-ground biomass for E. crebra, E. melanophloia and E. populnea. Root-to-shoot ratios and leaf area indices were also determined for the stands contributing to each regression. The regressions were then applied to measured eucalypt stems in the associated plant community to give estimates of each stand’s component (eucalypt tree fraction only) biomass per hectare. These eucalypt regressions were next applied to measured stems of each species on a total of 33 woodland sites in which these eucalypts individually contributed > 75% of total site basal area. Above-ground biomass/basal area relationships averaged 6.74 0.29 t m–2 basal area for 11 E. crebra sites, 5.11 0.28 t m–2 for 12 E. melanophloia sites and 5.81 0.11 t m–2 for 10 E. populnea sites. The mean relationship for all sites was 5.86 0.18 t m–2 basal area. The allometric relationships presented at both individual tree and stand levels, along with calculated biomass : basal area relationships, enable ready estimates to be made of above-ground biomass (carbon stocks) in woodlands dominated by these eucalypts in Queensland, assuming individual stem circumferences or community basal areas are known. However, to document changes in carbon stocks (e.g. for Greenhouse Gas Inventory or Carbon Offset trading purposes), more attention needs to be placed on monitoring fluxes in the independent variables (predictors) of these allometric equations.

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