Modeling the above and belowground biomass of planted and coppiced Eucalytpus globulus stands in NW Spain

Vega-Nieva, Daniel José; Valero, Enrique; Picos, Juan; Jiménez, Enrique

doi:10.1007/s13595-015-0493-6

Cited by 16 publications

(14 citation statements)

References 42 publications

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“…As commonly found for branch components, the precision was lower, with R 2 values of respectively 0.65 and 0.7 for P. cooperi and P. durangensis. Similar R 2 values for branch biomass prediction are commonly reported in the literature (e.g., [11][12][13]49,[64][65][66]). Tree branches are widely acknowledged to be difficult to model [67].…”

Section: Resultssupporting

confidence: 85%

“…Although crown ratio was considered in predicting branch volume, branch volume was slightly underestimated in the largest diameter classes for both species. Very mature trees tend to have lower branch and leaf allocation (e.g., [13,69], together with some possible crown senescence. Caution must therefore be taken in using the derived equations in very large trees of diameters above 60-70 cm.…”

Section: Resultsmentioning

confidence: 99%

“…Such models would help in decision-making associated with the sustainable extraction of more biologically renewable fuels from forests (e.g., [2,8]). This is particularly relevant considering the potential impacts of the removal of such fractions, increasingly used as a bioenergy feedstock, on nutrient and carbon cycling (e.g., [9][10][11][12][13]). Accurate information about bark and branch volume is also very important for planning silvicultural practices, transportation and storage logistics in relation to use of these fractions for bioenergy production (e.g., [14][15][16][17]).…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, several studies have focused on the compatibility between the diameter reduction described by the taper function and the total stem volume (e.g., [33,39,42,43]) and some works have also extended compatibility to bark (e.g., [22,32]). Compatible adjustment is also considered important for biomass fractions prediction (e.g., [13,44,45]. In contrast to the relatively large body of literature on compatible stem and taper prediction (e.g., [42,43]), little effort has been made to develop compatible models for predicting the volume of important tree fractions such as branches (e.g., [4][5][6][7]).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Compatible System for Predicting Total and Merchantable Stem Volume over and under Bark, Branch Volume and Whole-Tree Volume of Pine Species

Corral-Rivas

Vega-Nieva

Rodríguez‐Soalleiro

et al. 2017

Forests

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Accurate quantification of branch volume in trees is important for sustainable forest management, especially as these fractions are increasingly used for bioenergy, and for precise forest CO 2 quantification. Whereas a large focus has been placed on the compatible estimation of tree taper and bole volume with and without bark, little effort has been made to develop models that allow a simultaneous prediction of these variables together with tree branch volume. In this study, 595 Pinus cooperi trees and 700 Pinus durangensis trees were sampled in pine-oak forests in the Sierra Madre Occidental, Mexico. A compatible system for predicting two segmented taper functions, over and under bark; the corresponding merchantable volumes; coarse branch volume and whole-tree volume was fitted using a modified continuous autoregressive structure to account for autocorrelation. The proposed compatible equations explained more than 97% of the observed variability in diameter over and under bark, volume over and under bark, and total tree volume and more than 64% of the observed variability in branch volume in both species. The method described can theoretically be replicated for any tree species, thus providing a better understanding of the patterns of volume distribution by components, potentially improving carbon accounting system and forest bioenergy planning.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compatible System for Predicting Total and Merchantable Stem Volume over and under Bark, Branch Volume and Whole-Tree Volume of Pine Species

Corral-Rivas

Vega-Nieva

Rodríguez‐Soalleiro

et al. 2017

Forests

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show abstract

“…Our results were consistent with the literature of biomass partitioning. The root to shoot biomass ratios found in our study (0.17-0.40) were similar to the range reported for other coniferous species (0.18-0.35) [29,52,53]. It is crucial to accurately estimate the total biomass, and the root to shoot biomass ratios can be an important predictor for root biomass.…”

Section: Discussionsupporting

confidence: 89%

Developing Two Additive Biomass Equations for Three Coniferous Plantation Species in Northeast China

Dong

Zhang

2016

Forests

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Accurate quantification of tree biomass is critical and essential for calculating carbon storage, as well as for studying climate change, forest health, forest productivity, nutrient cycling, etc. Tree biomass is typically estimated using statistical models. In this study, a total of 289 trees were harvested and measured for stem, root, branch, and foliage biomass from three coniferous plantation species in northeastern P.R. China. We developed two additive systems of biomass equations based on tree diameter (D) only and both tree diameter (D) and height (H). For each system, likelihood analysis was used to verify the error structures of power functions in order to determine if logarithmic transformation should be applied on both sides of biomass equations. The model coefficients were simultaneously estimated using seemingly unrelated regression (SUR). The results indicated that stem biomass had the largest relative contribution to total biomass, while foliage biomass had the smallest relative proportion for the three species. The root to shoot ratio averaged 0.27 for Korean pine, 0.25 for larch, and 0.23 for Mongolian pine. The two additive biomass systems obtained good model fitting and prediction performance, of which the model R a 2 > 0.80, and the percent mean absolute bias (MAB%), was <17%. The second additive system (D and H) had a relatively greater R a 2 and smaller root mean square error (RMSE). The model coefficient for the predictor H was statistically significant in eight of the twelve models, depending on tree species and biomass component. Adding tree height into the system of biomass equations can marginally improve model fitting and performance, especially for total, aboveground, and stem biomass. The two additive systems developed in this study can be applied to estimate individual tree biomass of three coniferous plantation species in the Chinese National Forest Inventory.

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The potential of Eucalyptus plantations to restore degraded soils in semi-arid Morocco (NW Africa)

Boulmane¹,

Oubrahim

Halim

et al. 2017

Annals of Forest Science

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& Key message Short-rotation forestry using eucalyptus in degraded oak forests in the semi-arid area of NW Morocco can be a useful strategy to avoid further degradation and carbon loss from this ecosystem, but it might be constrained by nutrient and water supply in the long term. & Context Land degradation and deforestation of natural forests are serious issues worldwide, potentially leading to altered land use and carbon storage capacity. & Aims Our objectives were to investigate if short-rotation plantations can restore carbon pools of degraded soils, without altering soil fertility. & Methods Carbon and nutrient pools in above-and belowground biomass and soils were assessed using stand inventories, harvested biomass values, allometric relationships and selective sampling for chemical analyses. & Results Carbon pools in the total ecosystem were low in the degraded land and in croplands (6-13 Mg ha −1) and high in forests(66-94ineucalyptusplantations;86-126innativeforests).Thesoilnutrientstatusofeucalyptusstandswasintermediate between degraded land and native forests and increased over time after eucalyptus introduction. All harvest scenarios for eucalyptus are likely to impoverish the soil but, for the moment, the soil nutrient status has not been affected. & Conclusion Afforestation of degraded land with eucalyptus can be a useful restoration tool relative to carbon storage and soil fertility, provided that non-intensive forestry is applied.

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Modeling the above and belowground biomass of planted and coppiced Eucalytpus globulus stands in NW Spain

Abstract: & Key message The study developed equations for predicting aboveground and belowground biomass of planted and coppiced Eucalyptus globulus in NW Spain.

Cited by 16 publications

References 42 publications

Compatible System for Predicting Total and Merchantable Stem Volume over and under Bark, Branch Volume and Whole-Tree Volume of Pine Species

Compatible System for Predicting Total and Merchantable Stem Volume over and under Bark, Branch Volume and Whole-Tree Volume of Pine Species

Developing Two Additive Biomass Equations for Three Coniferous Plantation Species in Northeast China

The potential of Eucalyptus plantations to restore degraded soils in semi-arid Morocco (NW Africa)

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