Estimating tree biomass of subsaharan african forests. Methods for estimating aboveground biomass of forest and. Lidar remote sensing of vegetation biomass qi chen 21. However, the use of generalized equations can lead to a bias in estimating biomass for a particular species clark et al. Root biomass allocation in the worlds upland forests. Biomass and carbon stock estimates for tropical forest spe cies enhance our. Estimates of biomass over large areas have been determined by a wide range of approaches, including. Estimates of the amount of biomass in the worlds terrestrial ecosystems range from 385 to 650 pgc table 1. In contrast, the part of tree biomass that is below ground the roots is much more. Allometric equations for estimating the aboveground biomass. The relationship between carbon storage and sequestration in a forest has implications for climate. Biomass estimation equations for mesquite trees in the americas. Depending on tree and site characteristics crown biomass accounts for a significant portion of the total aboveground biomass in the tree. This primer discusses two approaches for estimating the biomass density of woody formations based on existing forest inventory data.
Allometric model for predicting aboveground biomass and. The seed rain and seed bank of a native tallgrass prairieoldfield transition. Department of agriculture, forest service, southern research station, 4700 old kingston pike, knoxville, tn 37919, united states bdelaney forestry services, llc, 1216 calapooia street, albany, or 97321, united states. Improved estimates of biomass expansion factors for sitka spruce. Monitoring and estimating tropical forest carbon stocks. Another example of this group of methods was a biomass map for the amazon, generated via interpolation from biomass measurements obtained at only 56 sites houghton et al. Complex hypotheses, such as optimal or allometric partitioning theories between tree communities, need to be tested using biomass compartment. Allometric equations for belowground biomass of four key. Thus, estimating aboveground forest biomass carbon is the most critical step in quantifying carbon stocks and. Bangladesh forest department initiated a nationwide forest inventory to assess biomass and carbon stocks in trees and forests. The use of a suitable and rigor method to accurately estimate forest biomass is significant. However, the large uncertainty in biomass estimation is unable to meet the requirement of the accurate carbon accounting. Forest plays a special role in carbon sequestration and thus mitigating climate change.
On the basis of these forest inventory data in the seven periods and bef. Winrock international estimating biomass and biomass change of. To check the accuracy of biomass estimation, we compared the allometric equationbased biomass of kiyono et al. Data for biomass assessment 17 two data sets were obtained to evaluate our biomass estimates. A primer find, read and cite all the research you need on researchgate.
Estimating root biomass for nontree vegetation for nontree vegetation such as shrubs, herbs and grasses, it is not possible to calculate belowground biomass using aboveground biomass data. Calculating forest carbon stocks university of manchester. Estimating biomass and biomass change of tropical forests fao. The equation of brown 1997 was constructed from the data collected by several authors from different tropical countries and at different times. The goal of this work was to determine if a reliable method to estimate root biomass. If merchantable volume of all species to a known minimum diameter often about 10 cm or so is reported, simple models have been developed to convert this to biomass using biomass expansion factors e. Brown s 1997 estimating biomass and biomass change of tropical forests. Brown, s, estimating biomass and biomass change of tropical forests. Allometric models for estimating volume and total aboveground. The agb of forests has been determined mainly by extrapolation of plot measurements of forest structural variables, principally diameter, height, and wood density of trees, based on allometric equations that convert the structural variables into biomass and carbon brown 1997, chave et al. Bcalifornia state university at chico, department of math and statistics, 400 west 1st avenue, chico, ca 959290525, usa. Comparing three sampling techniques for estimating fine woody. Calculate the average tree biomass in each of the 3 regions.
Two methods are generally used to convert field measurements of trees to aboveground biomass. Estimating biomass and biomass change of tropical forests. Because the worlds forests play a major role in regulating nutrient and carbon cycles, there is much interest in estimating their biomass. Such tools represent the primary method for estimating aboveground forest dry matter or carbon stocks brown et al. Jan 18, 2019 biomass estimation using allometric models is a nondestructive and popular method. Estimating forest biomass components with hemispherical. Forest biomass carbon stocks in china over the past 2.
Keanea,c and kathy grayb ausda forest service, rocky mountain research station, missoula fire sciences laboratory, 5775 w us highway 10, missoula, mt 59808, usa. Integrating alospalsar and ground based observations for. Biomass fuel, such as wood, crop refuse, and dung, accounts for one half of household energy in many developing countries, and for as much as 95% in some lower income ones, such as rural bangladesh biswas and lucas, 1997. To create an allometric equation for estimating aboveground tree dry biomass, a study is conducted where trees across a specific geographic, species, and tree size range are destructively harvested to estimate their. Estimating forest biomass in the usa using generalized. Short and longterm health effects of burning biomass in. Evaluation of sampling strategies to estimate crown biomass krishna p poudel1, hailemariam temesgen1 and andrew n gray2 abstract background. The first approach is based on the use of existing measured volume estimates vob per ha converted to biomass density tha using a variety of tools brown et al. Brown and others published estimating biomass and biomass change of tropical forests.
Most of the relevant biomass is produced in abundance in agricultural fields, private wastelands, village common lands, and forests. Moreover, the world is increasingly facing the conflicting pressures of economic growth and. Crown biomass estimation is useful for different purposes including. Grass biomass production above the ground carbon stocks. Short and longterm health effects of burning biomass in the. Brown, s, estimating biomass and biomass change of tropical. Biomass fuel, such as wood, crop refuse, and dung, accounts for one half of household energy in many developing countries, and for as much as 95% in some lower income ones, such as. In response to the growing interest in estimating carbon stocks in forests, available allometric equations have been compiled for subsaharan africa.
Methods for estimating aboveground biomass of forest and replacement. Evaluation of allometric equations for estimating aboveground tree biomass and standlevel c accumulation jason c. Biomass estimation and methodology preface accurate estimation of biomass and establishing biomass supply chain is a preliminary exercise for biomass based power production. Methods for estimating aboveground biomass of forest and replacement vegetation in the tropics richard condit center for tropical forest science and forestgeo smithsonian tropical research institute august 2008 please cite as. Allometric equations for estimating the aboveground. Selection of an allometric model can influence the accuracy of biomass estimation. Measurement protocols for other carbon pools are described elsewhere e. The usual approaches to estimating aboveground biomass agb are through traditional fieldbased measurement and remote sensing and geospatial information system gis methods brown and gaston 1995. Allometric models for predicting aboveground biomass in two. Post et al 1999, brown and masera 2003, pearson et al 2005a,ipcc2006. Ppp no electronic version on hand need to download or request copy. Improved estimates of biomass expansion factors for sitka. A universal approach to estimate biomass and carbon stock in. Estimating forest biomass components with hemispherical photography for douglasfir stands in northwest oregon joshua clark, a glen murphy a a department of forest engineering, resources and management, oregon state university, corvallis, or 973315706, usa.
Allometric equations for estimating biomass of open. Allometric models for predicting aboveground biomass in. A promising new approach for estimating biomass is light detection and ranging. The relationship between carbon storage and sequestration in a forest has implications for. Aboveground biomass equations for sustainable production of. For the food and agriculture organization of the united nations. Improving spatial distribution estimation of forest. Pdf estimating biomass and biomass change of tropical. Spatial variability of throughfall in a subtropical rain forest in taiwan. Improved allometric equations for tree aboveground biomass. Estimating tree biomass and changes in root biomass following clearcutting of brachystegiajulbernardia miombo woodland in central zambia volume 41 issue 1. Therefore, onsite measurement using soil core method or pit method is used for the purpose, as described in chapter 11. Brown, s, estimating biomass and biomass change of.
Development of equations for predicting puerto rican. Evaluation of sampling strategies to estimate crown biomass. Estimates of aboveground biomass based on wellestablished methods are relatively abundant. Before the use of existing equations, a validation for the selection of the best allometric equation is required to as. Previously developed allometric equations are applied to forest systems of interest under the assumption that the populations being studied are very similar to those for. Allometric equations for aboveground biomass estimation of olea. In excel, the symbol raises a number to a power 9 the data comes from 3 different regions in the forest. Evaluation of allometric equations for estimating above.
Biomass estimation equations for mesquite trees in the. Winrock carbon monitoring guideline macdicken 1997, fao brown 1997, revised ipcc 1996. Biomass estimation using allometric models is a nondestructive and popular method. Comparing three sampling techniques for estimating fine. To select one or other of the available models in the literature to estimate agb it is. The comparison indicates that the allometric equationbased biomass estimation by brown 1997 shows overestimation and that by kenzo et al. Mar 20, 2019 the usual approaches to estimating aboveground biomass agb are through traditional fieldbased measurement and remote sensing and geospatial information system gis methods brown and gaston 1995. Fearnside assumed a belowground biomass that was 33. Methods for estimating above ground biomass carbon stocks. Pdf estimating biomass and biomass change of tropical forests. The allometric equation developed by brown 1997 for tropical moist forest is. Development of equations for predicting puerto rican subtropical dry forest biomass and volume thomas j. Comparing three sampling techniques for estimating fine woody down dead biomass robert e.
1559 1655 118 275 772 694 239 263 1117 186 1199 1001 322 669 246 833 1268 721 806 1034 1051 776 684 1259 1273 696 1274 228 441 1086 1151 195 44 463 448 234 985 302 368