Estimating total aboveground, stem and branch biomass using multi-frequency SAR

2017 ◽  
Author(s):  
Oliver Cartus ◽  
Maurizio Santoro ◽  
Urs Wegmuller ◽  
Bjorn Rommen
Keyword(s):  
Branch Biomass

ESTIMATING SINGLE TREE STEM AND BRANCH BIOMASS USING TERRESTRIAL LASER SCANNING

2015 ◽  
Vol 77 (26) ◽  
Author(s):  
Nurliyana Izzati Ishak ◽  
Md Afif Abu Bakar ◽  
Muhammad Zulkarnain Abdul Rahman ◽  
Abd Wahid Rasib ◽  
Kasturi Devi Kanniah ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
Stem Volume ◽  
Biomass Estimation ◽  
Forest Plot ◽  
Individual Tree ◽  
Matching Process ◽  
Branch Biomass ◽  
Individual Trees ◽  
Tree Stem

This paper presents a novel non-destructive approach for individual tree stem and branch biomass estimation using terrestrial laser scanning data. The study area is located at the Royal Belum Reserved Forest area, Gerik, Perak. Each forest plot was designed with a circular shape and contains several scanning locations to ensure good visibility of each tree. Unique tree signage was located on trees with diameter at breast height (DBH) of 10cm and above.  Extractions of individual trees were done manually and the matching process with the field collected tree properties were relied on the tree signage and tree location as collected by total station. Individual tree stems were reconstructed based on cylinder models from which the total stem volume was calculated. Biomass of individual tree stems was calculated by multiplying stem volume with specific wood density. Biomass of individual was estimated using similar concept of tree stem with the volume estimated from alpha-hull shape. The root mean squared errors (RMSE) of estimated biomass are 50.22kg and 27.20kg for stem and branch respectively. 

Diameter-based biomass regression models ignore large sapwood-related variation in Sitka spruce

1990 ◽  
Vol 20 (7) ◽  
pp. 1098-1104 ◽  
Author(s):  
B. T. Bormann
Keyword(s):  
Multiple Regression ◽  
Regression Models ◽  
Net Primary Productivity ◽  
Tree Height ◽  
Sitka Spruce ◽  
Potential Productivity ◽  
Biomass Equations ◽  
Multiple Regression Models ◽  
Radial Thickness ◽  
Branch Biomass

Precise estimates of biomass are needed in productivity and nutrient cycling studies, and for improved estimates of potential productivity. Improvements in prediction of foliage and branch biomass were sought by comparing multiple regression models using stem diameter, sapwood radial thickness, and tree height as independent variables in stands of Sitka spruce (Piceasitchensis (Bong.) Carr.) in southeast Alaska. Five sites were sampled by stratifying trees into four diameter and three sapwood-thickness classes. Within stands, sample trees with thick sapwood consistently had 2–3 times more foliage and branch biomass than paired trees with thin sapwood but nearly equal diameter. Inclusion of both diameter and sapwood thickness in equations increased precision of foliage and branch biomass, leaf area, and net primary productivity by 15–31% and reduced standard error by 35–48% when compared with equations containing only diameter as an independent variable. Height growth over the last 30 years of intermediate and codominant trees with thick sapwood was 12–27% greater than that of paired trees with thin sapwood but nearly equal diameter at breast height. The addition of total tree height to multiple regression models, however, had little effect on their precision. Stem biomass equations were not improved by including tree height or sapwood thickness. The use of a diameter – sapwood thickness sampling matrix for construction of biomass equations may reduce the sample size needed and result in equations with wider application.

The potential of synthetic aperture radar (SAR) for quantifying the biomass of Australia's woodlands.

2000 ◽  
Vol 22 (1) ◽  
pp. 124 ◽  
Author(s):  
RM Lucas ◽  
AK Milne ◽  
N Cronin ◽  
C Witte ◽  
R Denham
Keyword(s):  
Remote Sensing ◽  
Synthetic Aperture Radar ◽  
Strong Relationship ◽  
Carbon Stocks ◽  
Synthetic Aperture ◽  
Above Ground Biomass ◽  
Ground Biomass ◽  
Branch Biomass ◽  
Aperture Radar

The potential of Synthetic Aperture Radar (SAR) for estimating the above ground and component biomass of woodlands in Australia is demonstrated using two case studies. Case Study 1 (In,june; central Queensland) shows that JERS-1 SAR L HH data can be related more to the trunk than the leaf and branch biomass of woodlands. A strong relationship between L HH and above ground biomass is obtained when low biomass pasture sites are included. Case Study I1 (Talwood, southern Queensland) determines that L and P band data can be related both to trunk and branch biomass, due to the similarity in the orientation and size of these scattering elements, and also to total above ground biomass. Saturation of the C. L and P band data occurred at approximately 20-30 Mglha; 60-80 Mglha and 80-100 Mglha. These preliminary results indicate that data from SAR are useful for quantifying changes in carbon stocks resulting from land use change in Australia's woodlands and for applications in rangeland assessment and management. Key words: remote sensing, biomass, woodlands

scholarly journals Outplanting performace of eucalyptus clonal cuttings produced in different containers and substrates

2008 ◽  
Vol 32 (6) ◽  
pp. 1019-1028 ◽  
Author(s):  
Teresa Aparecida Soares de Freitas ◽  
Deborah Guerra Barroso ◽  
José Geraldo de Araújo Carneiro ◽  
Ricardo Miguel Penchel ◽  
Marcos Pellegrini Coutinho
Keyword(s):  
Sugarcane Bagasse ◽  
Filter Cake ◽  
Block Design ◽  
Eucalyptus Grandis ◽  
Ground Level ◽  
Rice Hull ◽  
Root Bark ◽  
Randomized Block Design ◽  
Branch Biomass ◽  
Sugarcane Filter Cake

The objective of this work was to evaluate the outplanting growth of Eucalyptus grandis e E. saligna clones, produced by cuttings in tubes (50cm³) and in pressed blocks (40x60x07cm) - 175 cm³/ seedlings, with different substrates (BT - sugarcane bagasse+sugarcane filter cake; AR - carbonized rice hull + eucalyptus bark; TF - peat). The experiment was arranged in a randomized block design, in a 2x7 factorial (2 clones and 7 treatments), with four replicates with 25 plants. Survival was evaluated two months later. Plant growth was monitored through height and ground level diameter at 20, 40, 60, 120 and 180 days after outplanting. To evaluate the effect of the containers on stem and root biomass in both clones, 180 days after outplanting, the cuttings grown in BT substrate with fertilizer were selected. One plant per plot of each clone, grown in tubes and in pressed blocks was selected. The E. grandis and E. saligna cuttings grown in pressed blocks with sugarcane bagasse+sugarcane filter cake presented greater height and diameter after out planting. Both clones presented larger root, bark, log and branch biomass production in plants produced in the block system. Cuttings of E. saligna grown in pressed blocks showed 80% most wood biomass 180 days after outplanting, compared to that grown in tubes. In E. grandis, the differences in diameter and height, in function of the cutting production system, decreased along time, while in E. saligna these differences increased along the evaluation period.

Crown structure of old-growth Douglas-fir in the western Cascade Range, Washington

2001 ◽  
Vol 31 (7) ◽  
pp. 1250-1261 ◽  
Author(s):  
Hiroaki Ishii ◽  
Megan E Wilson
Keyword(s):  
Structural Complexity ◽  
Douglas Fir ◽  
Cascade Range ◽  
Old Growth ◽  
Crown Structure ◽  
Branch Biomass ◽  
Size Variability ◽  
Branch Density ◽  
Branch Size ◽  
Epicormic Branches

Crown structure of old-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) is characterized by low live-branch density, numerous dead branches and epicormic branches, high branch-size variability, and large gaps in the crown. These features define structural complexity of the crown and create variable crown microenvironments. For the 60 m tall, 400-year-old Douglas-fir trees measured in this study, number of live branches decreased and dead branches increased from the upper to lower crown. Dead branches were found below the lowest live branch indicating that crown recession had occurred. Live-branch biomass culminated at 45 m and decreased markedly below 35 m. Numerous vertical gaps between branches occurred below 40 m. Epicormic branches accounted for 14.6–47.5% of the total number of live branches per tree and contributed to increased crown depth. Epicormic branches filled inner regions of the crown, and contributed to increased branch-size variability. A model of crown structure developed for young trees could be fit to the upper crown of the study trees but could not be applied to the middle to lower crown because of increased branch-size variability. Relative levels of photosynthetically active radiation in the crown decreased with decreasing height, but a local peak occurred around 35–40 m, coinciding with the height of marked decrease in live-branch biomass.

A comparison of seasonal patterns of photosynthate production and use in branches of red spruce saplings at two elevations

1991 ◽  
Vol 21 (4) ◽  
pp. 455-461 ◽  
Author(s):  
Christian P. Andersen ◽  
Samuel B. McLaughlin ◽  
W. Kelly Roy
Keyword(s):  
Carbon Assimilation ◽  
Growing Season ◽  
Red Spruce ◽  
Seasonal Patterns ◽  
Sink Strength ◽  
Great Smoky Mountains ◽  
Sink Activity ◽  
Lower Elevation ◽  
Branch Biomass ◽  
High Elevations

Seasonal patterns of carbon transport from 14C-labeled foliage were examined in red spruce (Picearubens Sarg.) branches at 1935 and 1720 m elevations in the Great Smoky Mountains National Park to characterize possible physiological mechanisms underlying the observed reductions in growth at high elevations. Current and 1-year-old foliage was labeled on 5- to 7-year-old branches of sapling-sized trees in June, August, and October. Retention of 14C was measured after 24 h, and allocation to other branch segments was characterized after 7 days. Total 14C-labeled carbon assimilation was greater in current than in 1-year-old foliage throughout the growing season. This suggests that photosynthetic capacity is high in developing foliage prior to needle maturity and remains high during the first growing season. In August, 14C retention in labeled foliage was less at the higher than at the lower elevation site, possibly reflecting increased respiratory losses that had been previously reported at the higher site. Retention of 14C in current-year shoots as a percent of 14C remaining after 7 days, a measure of sink strength, was high at both sites in June and remained high throughout the season in current-year shoots at the higher elevation site. The relatively high sink activity coupled with the large apportionment of biomass to current-year shoots (19.9 and 26.7% of total branch biomass at the lower and higher elevation sites, respectively) may make red spruce particularly susceptible to stresses such as winter injury that affect young foliage. In addition, the relatively greater sink activity of current-year shoots at the higher elevation site in August and October suggests that the contribution of current-year foliage to overall tree growth may be less at the higher than at the lower elevation site.

scholarly journals Above-Ground Biomass Models of Caragana korshinskii and Sophora viciifolia in the Loess Plateau, China

2019 ◽  
Vol 11 (6) ◽  
pp. 1674 ◽  
Author(s):  
Yanxing Dou ◽  
Yang Yang ◽  
Shaoshan An
Keyword(s):  
Loess Plateau ◽  
Leaf Biomass ◽  
Biomass Estimation ◽  
Above Ground Biomass ◽  
The Loess Plateau ◽  
Ground Biomass ◽  
Caragana Korshinskii ◽  
Canopy Volume ◽  
Branch Biomass ◽  
Estimation Models

The quantification of above-ground biomass is based on the calculation of carbon storage, which is important for the balance of carbon cycling. However, the allometric models of shrubs for calculating the above-ground biomass of shrubs in the Loess Plateau are scarce. In order to solve this issue, this study analyzed some highly correlated variables, including height (H), branch diameters (D), canopy volume (Cv), canopy area (Ca), and then built a regression model to predict the above-ground biomass in two common shrubs (Caragana korshinskii and Sophora viciifolia) in the Loess Plateau, China. The results show that the above-ground biomass of these two shrubs can be accurately predicted by H and D, and then we can use allometric model (y = axb) to calculate shrub above-ground biomass (including leaf biomass and branch biomass). Furthermore, the correlation between leaf biomass and branch biomass in Caragana korshinskii and Sophora viciifolia indicates that the components of above-ground biomass are closely related to each other. In addition, there is a strong linear relationship (p < 0.01) between the observed and estimated biomass values, which confirms the data accuracy of the above-ground biomass estimation models. In summary, these two biomass estimation models provide an accurate way to estimate the quantification of carbon for shrubs in the Loess Plateau.

Comparison of branch biomass relationships for North Carolina and Oklahoma/Arkansas loblolly pine seed sources growing in southeastern Oklahoma

2002 ◽  
Vol 159 (3) ◽  
pp. 241-248 ◽  
Author(s):  
Michael A Blazier ◽  
Thomas C Hennessey ◽  
Thomas B Lynch ◽  
Robert F Wittwer
Keyword(s):  
North Carolina ◽  
Loblolly Pine ◽  
Seed Sources ◽  
Branch Biomass

scholarly journals A preliminary crown biomass table for even-aged Picea abies stands in Switzerland

1997 ◽  
Vol 70 (2) ◽  
pp. 103-112 ◽  
Author(s):  
V. A. Usoltsev ◽  
C. W. Hoffmann
Keyword(s):  
Picea Abies ◽  
Tree Density ◽  
Site Quality ◽  
Density Distributions ◽  
Yield Table ◽  
Branch Biomass ◽  
Crown Biomass ◽  
Table Data ◽  
Typical Site ◽  
Forest Managers

Summary The assessment of biomass and biomass changes due to environmental influences requires not only stem or merchantable mass, but also branches and needles. They have been of relatively lit-tle importance to forest managers to date, but their inclusion in models can make the resulting predictions more precise. A hybrid method is described to derive regressions for site quality, needle and branch biomass for individual Picea abies trees. By using Swiss stand table data on tree density distributions, a traditional yield table for branch and needle biomass is computed, and from these, regressions are derived which use only age and site quality as independent vari-ables. Three tables for typical site qualities are given. The tabulated regressions include pseudo-probability values, coefficients of determination and estimated standard error for the overall models. These biomass fractions comprise a varying fraction of the tree, being important at low ages and much less so at later ages.

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