Species-specific biomass allometric models and expansion factors for indigenous and planted forests of the Mozambique highlands

Magalhães, Tarquinio Mateus; Cossa, Victoria Norberto; Guedes, Benard S.; Fanheiro, Amélia Saraiva Monguela

doi:10.1007/s11676-020-01156-0

Cited by 10 publications

(10 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The highest percentage of carbon content was observed in stem (44.1%), followed by branch (42.3%) and foliage (34.1%) (Table 2). This finding was different from previous studies that assumed the percentage of carbon content in eucalyptus biomass around 50% (Latifah et al, 2018;Viera and Rodríguez-Soalleiro, 2019;Wirabuana et al, 2019;Magalhães et al, 2020). In general, the variation of carbon storage in tree species was influenced by certain factors, including age, site quality, and genetics.…”

Section: Figure 2 Distribution Of Sample Trees In Every Diameter Classcontrasting

confidence: 90%

Carbon storage and energy production of Eucalyptus urophylla developed in dryland ecosystems at East Nusa Tenggara

Sadono

Wardhana

Idris

et al. 2021

J.Degrade.Min.Land Manage.

View full text Add to dashboard Cite

The development of Eucalyptus urophylla in dryland ecosystems plays an important contribution to support climate change mitigation and renewable energy diversification. However, the information about the potential of E. urophylla for carbon reduction and energy production is rarely documented, even though it is necessary as fundamental considerations to determine the best strategy for sustainable natural resources management, primarily in dryland ecosystems. This study aimed to quantify the carbon storage and energy production of E. urophylla established in dryland ecosystems at East Nusa Tenggara. The study site is located in a eucalyptus plantation managed by Timor Tengah Selatan Forest Management Unit. Destructive sampling was conducted on 25 sample trees that were evenly distributed from small to big ones. The percentage of carbon content in every tree component, namely stem, branch, and foliage, was determined using elemental analysis, while the calorific value of each tree component was analyzed using a bomb calorimeter. Carbon storage in each component was calculated by multiplying biomass and the percentage of carbon content, while the energy production was computed by multiplying high heating value and biomass from every tree component. The results found the mean carbon storage of E. urophylla in the study site was 55.51 kg tree-1 with a minimum of 6.34 kg tree-1 and a maximum of 184.76 kg tree-1. The percentage of carbon content in the foliage was lower than other tree components by approximately 34.1%. Interestingly, the calorific value of foliage was relatively higher than stem and branch with around 5,252 kcal kg-1. The energy production of E. urophylla ranged from 252.6 to 7,813.3 MJ tree-1 with an average of 2,357.87 MJ tree-1. According to the results, this study concluded the development of E. urophylla in dryland ecosystems demonstrated a meaningful contribution to carbon absorption and energy production at East Nusa Tenggara.

show abstract

Section: Figure 2 Distribution Of Sample Trees In Every Diameter Classcontrasting

confidence: 90%

Carbon storage and energy production of Eucalyptus urophylla developed in dryland ecosystems at East Nusa Tenggara

Sadono

Wardhana

Idris

et al. 2021

J.Degrade.Min.Land Manage.

View full text Add to dashboard Cite

show abstract

“…Magalhães et al (2020) reported that the stem density of miombo woodlands and tree plantations in the study area was ≤200 and >1000 ha –1 , respectively, and Guedes, Olsson, Sitoe, & Egnell (2018) reported that litterfall in tree plantations was double that of miombo woodlands. Stand density contributes to maximizing litter production (Bahru & Ding, 2020; Kara et al, 2008; Will et al, 2005).…”

Section: Discussionmentioning

confidence: 92%

“…This also explains why younger (<25 years) and second‐rotation plantations had larger values of BD compared with the older (>50 years) and the first‐rotation plantations, since the former have less canopy cover than the latter, leading to a relatively limited capacity of intercepting rainfall. The study area is vulnerable to splash erosion due to steep slopes and intense rainfall; however, miombo woodlands and younger plantations are more vulnerable due to open forest canopy, scarce litter layer (Guedes, Olsson, Sitoe, & Egnell, 2018), and understory vegetation (Magalhães et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Miombo conversion to monoculture tree plantations: Changes in soil properties

2021

Self Cite

View full text Add to dashboard Cite

Monoculture plantations replacing native woodlands are increasingly common globally. In Mozambique, vast miombo* woodlands have been replaced by single‐species plantations. Studies on the effect of replacing native woodlands by single‐species tree plantations on soil properties are abundant; however, those focused specifically on the replacement of miombo and considering a longer time since replacement and covering different growth stages are scarce. This article aimed at assessing the effects of the conversion of miombo to monoculture on soil properties and studying the effect of species planted, plantation age, and rotation on soil capacity to store carbon (C) and nitrogen (N). Plantations established in soils formerly covered by miombo were compared to the remaining original miombo with regard to soil properties. The effect of species planted, plantation age, and rotation on soil properties was examined using the three‐way ANOVA, followed by Tukey's test. Miombo conversion to plantations led to an increase of up to 66% of soil organic C (SOC) and 77% of total N (STN) and a decrease in soil bulk density (BD) of up to 16%. The replacement of the first‐ by second‐rotation plantations led to a decrease of up to 38% in SOC and STN and an increase of up to 32% in BD. BD decreased with plantation age; SOC and STN stocks tended to increase: 60 years after the replacement of miombo by plantations, SOC and STN increased by up to 88%. Changes in soil properties due to the replacement of miombo by monoculture were mainly driven by the species planted. * a sparse open deciduous woodland characteristic of dry parts of eastern Africa

show abstract

“…We also used model precision (V, Eq. ( 6)) statistics 51 . We considered the model with the lowest MAPE, V, AIC, and highest AICw the best-fitting model.…”

Section: Model Evaluation and Validationmentioning

confidence: 99%

Allometric equations and height-diameter models for estimating above-and below-ground biomass of Colophospermum mopane J.Léonard. in Mozambique

Lisboa,

Macôo,

Sitoe

2024

Preprint

View full text Add to dashboard Cite

This study aimed to develop species-specific biomass allometric equations (BAE) for the estimation of above-ground biomass (AGB) and below-ground biomass (BGB) of Colophospermum mopane, J.Léonard species in Mozambique and to evaluate the feasibility of including total height estimated by the height-diameter (H-D) model in the equations to improve the accuracy of biomass estimation. We applied a destructive method and felled 120 trees of C. mopane in Mabalane and Tambara districts. We measured breast height diameter, total height (H), and dry weight of each component (roots, stem, branches, and leaves). We fitted three BAE and fifteen H-D models using OLS and non-linear least squares regression. A validation procedure checked all models for applicability. We conducted a forest inventory using 78 temporary clusters, each consisting of four plots measuring 100 m x 20 m, to estimate the average AGB and BGB of C. mopane using the best-fitting BAE and H-D model. We also compared the best BAE of C. mopane with existing, locally developed species-specific BAEs. The study found that the model, including the interaction of D2 and H, performed better than the model with separate D and H variables. However, models including D and H performed similarly to models with D alone. The Power model and HossfeldIV performed best among the models with 2 and 3 parameters, respectively. Integrating the H-D model into the BAE for AGB and estimation can improve the efficiency and reliability of biomass estimation and stand volume by forest inventory data. Overall, this research is timely as there is an urgent need to improve the assessment of biomass and carbon emissions in mopane woodland (MW) in southern Africa, given their spatial extent, and to support climate goals and the sustainable management of these ecosystems.

show abstract

Species-specific biomass allometric models and expansion factors for indigenous and planted forests of the Mozambique highlands

Cited by 10 publications

References 87 publications

Carbon storage and energy production of Eucalyptus urophylla developed in dryland ecosystems at East Nusa Tenggara

Carbon storage and energy production of Eucalyptus urophylla developed in dryland ecosystems at East Nusa Tenggara

Miombo conversion to monoculture tree plantations: Changes in soil properties

Allometric equations and height-diameter models for estimating above-and below-ground biomass of Colophospermum mopane J.Léonard. in Mozambique

Contact Info

Product

Resources

About