Allometric equations for below-ground biomass of four key woody species in West African savanna-woodlands

ABSTRACT The Amazon forest comprises many different forest types, amongst them are campinas and campinaranas, which occur on Amazonian sandy soils, representing 2.65% of Amazonian territory. An understanding of the ecology and quantification of the environmental goods and services of campinaranas is key to their conservation. Based on a direct method to estimate biomass and carbon content of campinarana, we harvested and weighted 89 trees and other forest components in ten randomly allocated plots of 100 m2 (10 x 10 m) and 11 additional trees outside the plots. The data allowed us to describe how biomass is distributed amongst campinarana vegetation and amongst tree compartments. We developed allometric equations to estimate the total, above- and below-ground biomass and carbon stock of this forest type. We used a Weibull function to test if the diameter distribution of the individual trees sampled was consistent with the diameter distribution of the forest type. We also tested if terra-firme forest biomass equations could be used to estimate campinarana biomass, and whether a correction factor based on dominant height would reduce the error from these estimates. Allometric equations are considered to be the most reliable and rapid method for calculating forest biomass, and are used in forest management and climate change studies. These are the first total biomass equations developed for central Amazonian campinaranas. The best fitted allometric equation for total fresh biomass was: ln (Total Biomass) = -1.373 + 2.546 * ln DBH (R ² = 0.98, Sxy% = 4.19%).

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Allometric equations for predicting above-ground biomass of selected woody species to estimate carbon in East African rangelands

Agroforestry Systems ◽

10.1007/s10457-016-9997-9 ◽

2016 ◽

Vol 92 (3) ◽

pp. 599-621 ◽

Cited By ~ 4

Author(s):

Kenea Feyisa ◽

Sheleme Beyene ◽

Bekele Megersa ◽

Mohammed Y. Said ◽

de Leeuw Jan ◽

...

Keyword(s):

Woody Species ◽

Allometric Equations ◽

Above Ground Biomass ◽

East African ◽

Ground Biomass

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Caution Is Needed in Quantifying Terrestrial Biomass Responses to Elevated Temperature: Meta-Analyses of Field-Based Experimental Warming Across China

Forests ◽

10.3390/f9100619 ◽

2018 ◽

Vol 9 (10) ◽

pp. 619 ◽

Cited By ~ 1

Author(s):

Kai Yan ◽

Shuang Zhang ◽

Yahuang Luo ◽

Zhenghong Wang ◽

Deli Zhai ◽

...

Keyword(s):

Woody Plants ◽

Plant Biomass ◽

Meta Analysis ◽

Woody Species ◽

Biomass Accumulation ◽

Response Patterns ◽

Ground Biomass ◽

Plant Phylogeny ◽

Below Ground ◽

Meta Analyses

Certainty over warming-induced biomass accumulation is essential for addressing climate change. However, no previous meta-analysis has investigated this accumulation across the whole of China; also unclear are the differences between herbaceous and woody species and across plant phylogeny, which are critical for corresponding re-vegetation. We extracted data from 90 field-based experiments to reveal general patterns and driving factors of biomass responses all over China. Based on traditional meta-analyses, a warmer temperature significantly increased above- (10.8%) and below-ground (14.2%) biomass accumulation. With increasing warming duration (WarmD) and plant clade age, both above-ground and below-ground biomass showed significant increases. However, for herbaceous versus woody plants, and the whole community versus its dominant species, responses were not always constant; the combined synergies would affect accumulative response patterns. When considering WarmD as a weight, decreases in total above-ground biomass response magnitude were presented, and the increase in below-ground biomass was no longer significant; notably, significant positive responses remained in tree species. However, if phylogenetic information was included in the calculations, all warming-induced plant biomass increases were not significant. Thus, it is still premature to speculate whether warming induces biomass increases in China; further long-term experiments are needed regarding phylogeny-based responses and interspecies relations, especially regarding woody plants and forests.

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

Journal of Tropical Ecology ◽

10.1017/s0266467409006129 ◽

2009 ◽

Vol 25 (4) ◽

pp. 371-386 ◽

Cited By ~ 62

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.

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Effect of thinning intensity on understory herbaceous diversity and biomass in mixed coniferous and broad-leaved forests of Changbai Mountain

Forest Ecosystems ◽

10.1186/s40663-021-00331-x ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Gerong Wang ◽

Yue Sun ◽

Mo Zhou ◽

Naiqian Guan ◽

Yuwen Wang ◽

...

Keyword(s):

Seasonal Changes ◽

Mixed Forest ◽

Growing Season ◽

Total Biomass ◽

Herb Layer ◽

Simpson Index ◽

Thinning Intensity ◽

Ground Biomass ◽

Below Ground ◽

Understory Herb

Abstract Background Herbs are an important part of the forest ecosystem, and their diversity and biomass can reflect the restoration of vegetation after forest thinning disturbances. Based on the near-mature secondary coniferous and broad-leaved mixed forest in Jilin Province Forestry Experimental Zone, this study analyzed seasonal changes of species diversity and biomass of the understory herb layer after different intensities of thinning. Results The results showed that although the composition of herbaceous species and the ranking of importance values were affected by thinning intensity, they were mainly determined by seasonal changes. Across the entire growing season, the species with the highest importance values in thinning treatments included Carex pilosa, Aegopodium alpestre, Meehania urticifolia, and Filipendula palmata, which dominated the herb layer of the coniferous and broad-leaved mixed forest. The number of species, Margalef index, Shannon-Wiener index and Simpson index all had their highest values in May, and gradually decreased with months. Pielou index was roughly inverted “N” throughout the growing season. Thinning did not increase the species diversity. Thinning can promote the total biomass, above- and below-ground biomass. The number of plants per unit area and coverage were related to the total biomass, above- and below-ground biomass. The average height had a significantly positive correlation with herb biomass in May but not in July. However, it exerted a significantly negative correlation with herb biomass in September. The biomass in the same month increased with increasing thinning intensity. Total herb biomass, above- and below-ground biomass showed positive correlations with Shannon-Winner index, Simpson index and Pielou evenness index in May. Conclusions Thinning mainly changed the light environment in the forest, which would improve the plant diversity and biomass of herb layer in a short time. And different thinning intensity had different effects on the diversity of understory herb layer. The findings provide theoretical basis and reference for reasonable thinning and tending in coniferous and broad-leaved mixed forests.

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Eucalypt Clonal Hybrid Influences the Carbon Amount of Below-Ground Biomass in Oxisol, Brazil

Environmental Sciences Proceedings ◽

10.3390/iecf2020-07868 ◽

2020 ◽

Vol 3 (1) ◽

pp. 53

Author(s):

Grasiele Dick ◽

Humberto J. Eufrade-Junior ◽

Mauro V. Schumacher ◽

Gileno B. Azevedo ◽

Saulo P. S. Guerra

Keyword(s):

Carbon Concentration ◽

Eucalyptus Grandis ◽

Eucalyptus Camaldulensis ◽

Eucalyptus Urophylla ◽

Ground Biomass ◽

Homogeneity Of Variances ◽

Below Ground ◽

Hybrid Eucalyptus ◽

Carbon Determination ◽

Hybrid Clones

The objective of this study was to evaluate whether there is an influence of different clonal hybrids of Eucalyptus urophylla on the carbon concentration and amount in below-ground biomass in trees cultivated in Oxisol, Brazil. Stumps and roots of three different eucalypt hybrid clones, AEC 0144, AEC 0223, and VM01, were selected, weighed immediately after being removed from the ground, and sampled for carbon determination and moisture content at the laboratory. The Shapiro-Wilk and Bartlett tests were used to evaluate data distribution and the homogeneity of variances, respectively. Analysis of variance (ANOVA) complemented by the Scott-Knott test was used to evaluate the effects of specie/hybrid on the below-ground biomass (dry matter) and carbon amount per stump. The hybrid type of Eucalyptus urophylla does not influence the carbon concentration; however, there is a difference in below-ground biomass production and carbon amount with it being higher for Eucalyptus urophylla × Eucalyptus camaldulensis when compared to the species Eucalyptus urophylla and hybrid Eucalyptus urophylla × Eucalyptus grandis.

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