Biomass estimation of individual trees for coppice-originated oak forests

2019 ◽  
Vol 138 (4) ◽  
pp. 623-637 ◽  
Author(s):  
Emrah Ozdemir ◽  
Ender Makineci ◽  
Ersel Yilmaz ◽  
Meric Kumbasli ◽  
Servet Caliskan ◽  
...  
Keyword(s):  
Biomass Estimation ◽  
Oak Forests ◽  
Individual Trees

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. 

Fire tolerance of three tree species in pine - oak forests of Chignahuapan, Puebla, Mexico

2012 ◽  
Vol 21 (7) ◽  
pp. 873 ◽  
Author(s):  
Juana E. Juárez Bravo ◽  
Dante A. Rodríguez-Trejo ◽  
Ronald L. Myers
Keyword(s):  
Logistic Regression ◽  
Vegetation Dynamics ◽  
Inverse Relationship ◽  
Important Determinant ◽  
Oak Forests ◽  
Recovery Strategy ◽  
Shrub Species ◽  
Burned Site ◽  
Individual Trees ◽  
In Fire

Resprouting is a common recovery strategy of many tree and shrub species in fire-prone environments and is an important determinant of post-fire dominance and vegetation dynamics in many ecosystems. Top-kill, mortality and resprouting of the trees Quercus crassifolia, Arbutus xalapensis and Pinus teocote were studied on contiguous burned and unburned sites in the pine–oak forests of Chignahuapan, Puebla, Mexico. The study sample consisted of 375 individual trees, 199 on the burned site and 176 on the unburned site. T-tests and logistic regression were used in the statistical analysis. The number of resprouts per tree increased significantly (P < 0.001) in the broadleaved species, but not in the pine species. On the sites affected by fire, the smaller the diameter and higher the extent of top-kill in Q. crassifolia, the greater the probability of resprouting. None of the species exhibited differences in mortality (P > 0.05) regardless of fire or lack of fire. With Q. crassifolia, top-kill and tree death were greatest in the smaller-diameter individuals. Also, the probability of top-kill was much greater than the probability of mortality; however, this difference diminished at diameters greater than 16 cm. Similarly, with A. xalapensis, there was an inverse relationship between diameter and probability of tree death.

scholarly journals Improving Estimates of Acceptable Growing Stock in Young Upland Oak Forests in the Missouri Ozarks

1998 ◽  
Vol 15 (1) ◽  
pp. 28-32 ◽  
Author(s):  
Daniel C. Dey ◽  
Paul S. Johnson ◽  
H. E. Garrett
Keyword(s):  
Species Group ◽  
Slope Position ◽  
Oak Forests ◽  
Regression Analyses ◽  
Quadratic Mean ◽  
Growth And Survival ◽  
Growing Stock ◽  
Individual Trees ◽  
The Relationship ◽  
Future Growth

Abstract Estimates of regeneration or growing stock in young oak forests may be too high unless criteria are established that define explicitly acceptable growing stock. In young hardwood stands, crown class can be used to identify acceptable growing stock because it is related to the future growth and survival of reproduction. A method is presented for assigning crown class categories to hardwood stems based on their diameters (dbh). Young upland oak forests originating from clearcuts in the Missouri Ozarks were sampled to determine the relationship between dbh and crown class. Stands were 19 to 25 yr old. Threshold diameters (TD) separating one crown class category from another were determined using regression analyses. TD was not significantly affected by species group, and in some cases by aspect and slope position. Quadratic mean stand diameter (QMSD) was significantly related to TD. As QMSD increased so did TD. When QMSD equals 3 in., trees with dbh ≥ 3.9 in. are allocated to the codominant and dominant crown class category, and those ≥ 2.5 in. to the dominant, codominant, and intermediate category. TD can be used to assign a crown class category to individual trees, thereby improving estimations of acceptable growing stock. By this method, crown class can be used to define acceptable growing stock and evaluate stocking, yet it does not have to be measured in stand inventories. North. J. Appl. For. 15(1):28-32.

scholarly journals LiDAR Applications to Estimate Forest Biomass at Individual Tree Scale: Opportunities, Challenges and Future Perspectives

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 550
Author(s):  
Dandan Xu ◽  
Haobin Wang ◽  
Weixin Xu ◽  
Zhaoqing Luan ◽  
Xia Xu
Keyword(s):  
Remote Sensing ◽  
Laser Scanning ◽  
Forest Biomass ◽  
Remotely Sensed ◽  
Tree Level ◽  
Biomass Estimation ◽  
Future Perspectives ◽  
Individual Tree ◽  
The Individual ◽  
Individual Trees

Accurate forest biomass estimation at the individual tree scale is the foundation of timber industry and forest management. It plays an important role in explaining ecological issues and small-scale processes. Remotely sensed images, across a range of spatial and temporal resolutions, with their advantages of non-destructive monitoring, are widely applied in forest biomass monitoring at global, ecoregion or community scales. However, the development of remote sensing applications for forest biomass at the individual tree scale has been relatively slow due to the constraints of spatial resolution and evaluation accuracy of remotely sensed data. With the improvements in platforms and spatial resolutions, as well as the development of remote sensing techniques, the potential for forest biomass estimation at the single tree level has been demonstrated. However, a comprehensive review of remote sensing of forest biomass scaled at individual trees has not been done. This review highlights the theoretical bases, challenges and future perspectives for Light Detection and Ranging (LiDAR) applications of individual trees scaled to whole forests. We summarize research on estimating individual tree volume and aboveground biomass (AGB) using Terrestrial Laser Scanning (TLS), Airborne Laser Scanning (ALS), Unmanned Aerial Vehicle Laser Scanning (UAV-LS) and Mobile Laser Scanning (MLS, including Vehicle-borne Laser Scanning (VLS) and Backpack Laser Scanning (BLS)) data.

scholarly journals MASSIVE-SCALE TREE MODELLING FROM TLS DATA

2015 ◽  
Vol II-3/W4 ◽  
pp. 189-196 ◽  
Author(s):  
P. Raumonen ◽  
E. Casella ◽  
K. Calders ◽  
S. Murphy ◽  
M. Åkerbloma, ◽  
...  
Keyword(s):  
Laser Scanner ◽  
Ground Truth ◽  
Biomass Estimation ◽  
Forest Plot ◽  
Total Biomass ◽  
Ground Truth Data ◽  
Airborne Measurements ◽  
Massive Scale ◽  
New Feature ◽  
Individual Trees

This paper presents a method for reconstructing automatically the quantitative structure model of every tree in a forest plot from terrestrial laser scanner data. A new feature is the automatic extraction of individual trees from the point cloud. The method is tested with a 30-m diameter English oak plot and a 80-m diameter Australian eucalyptus plot. For the oak plot the total biomass was overestimated by about 17 %, when compared to allometry (N = 15), and the modelling time was about 100 min with a laptop. For the eucalyptus plot the total biomass was overestimated by about 8.5 %, when compared to a destructive reference (N = 27), and the modelling time was about 160 min. The method provides accurate and fast tree modelling abilities for, e.g., biomass estimation and ground truth data for airborne measurements at a massive ground scale.

scholarly journals STRUKTUR DAN KOMPOSISI VEGETASI POHON SERTA ESTIMASI BIOMASSA, KANDUNGAN KARBON DAN LAJU FOTOSINTESIS DI TAMAN NASIONAL GUNUNG HALIMUN-SALAK

2016 ◽  
Vol 12 (2) ◽  
pp. 161
Author(s):  
Muhammad Mansur ◽  
Nuril Hidayati ◽  
Titi Juhaeti
Keyword(s):  
Carbon Content ◽  
Basal Area ◽  
Dry Weight ◽  
Co2 Assimilation ◽  
Primary Forest ◽  
Biomass Estimation ◽  
Rate Of Photosynthesis ◽  
Plot Area ◽  
Study Sites ◽  
Individual Trees

Research the structure and composition of vegetation, biomass estimation, carbon content and the rate of photosynthesis was conducted in Citalahab Central Village,Gunung Halimun-Salak National Park, West Java, on August 2010. The purpose of research to determine the components and characteristics of each tree species at the study sites associated with biomass, the rate of CO2 assimilation and transpiration. Results showed that, the form of classified forest area of primary forest with a little disturbed. There were recorded 337 individual trees (stem diameter > 10 cm) per hectare from 71 species, 50 genera and 32 families. Lauraceae, Fagaceae, Myrtaceae, Rubiaceae and Meliaceae are the 5 most common families found in the plot area, thatis dominated by Altingia excelsa, Blumeodendron elateriospermum, Ardisia zollingeri, Gordonia excelsa, Tricalysia singularis, Castanopsis acuminatissima, Knema cinerea, Laportea stimulant, Vernonia arborea and Dysoxylum excelsum. Estimated biomass recorded of 304.5 tons dry weight / ha with a carbon content of 152.3 tons / ha of basal area of 28.89 m2/ha. Quercus oidocarpa, Litsea noronhae, Saurauia nudiflora, Castanopsis argentea and Altingia excelsa has recorded the highest photosyntheticrates compared with other species. While the highest transpiration rate is owned by the Macaranga triloba, Sandoricum koetjape, Prunus arborea, Urophyllum corymbosum and Altingia excelsa.

scholarly journals The Horizontal Distribution of Branch Biomass in European Beech: A Model Based on Measurements and TLS Based Proxies

2021 ◽  
Vol 13 (5) ◽  
pp. 1041
Author(s):  
César Pérez-Cruzado ◽  
Christoph Kleinn ◽  
Paul Magdon ◽  
Juan Gabriel Álvarez-González ◽  
Steen Magnussen ◽  
...  
Keyword(s):  
Empirical Model ◽  
Laser Scanning ◽  
European Beech ◽  
Horizontal Distribution ◽  
Forest Monitoring ◽  
Projection Area ◽  
Biomass Estimation ◽  
Tree Biomass ◽  
Individual Tree ◽  
Individual Trees

Forest biomass is currently among the most important and most researched target variables in forest monitoring. The common approach of observing individual tree biomass in forest inventory is to assign the total tree biomass to the dimensionless point of the tree position. However, the tree biomass, in particular in the crown, is horizontally distributed above the crown projection area. This horizontal distribution of individual tree biomass (HBD) has not attracted much attention—but if quantified, it can improve biomass estimation and help to better represent the spatial distribution of forest fuel. In this study, we derive a first empirical model of the branch HBD for individual trees of European beech (Fagus sylvatica L.). We destructively measured 23 beech trees to derive an empirical model for the branch HBD. We then applied Terrestrial Laser Scanning (TLS) to a subset of 17 trees to test a simple point cloud metric predicting the branch HBD. We observed similarities between a branch HBD and commonly applied taper functions, which inspired our HBD model formulations. The models performed well in representing the HBD both for the measured biomass, and the TLS-based metric. Our models may be used as first approximations to the HBD of individual trees—while our methodological approach may extend to trees of different sizes and species.

Resistance of some plum cultivars and individual trees to Plum Pox (Sharka) virus

Agronomie ◽  
1981 ◽  
Vol 1 (8) ◽  
pp. 617-622 ◽  
Author(s):  
D. ŠUTI ◽  
M. RANKOVIĆ
Keyword(s):  
Individual Trees ◽  
Sharka Virus
Sign in / Sign up

Export Citation Format

Share Document