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Testing a common allometric equation for predicting the above-ground weight of trees and estimation of net ecosystem production

Research Project

Project/Area Number 15580123
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 林学・森林工学
Research InstitutionGifu University

Principal Investigator

KOMIYAMA Akira  Gifu University, Faculty of Applied Biological Sciences, Professor, 応用生物科学部, 教授 (60135184)

Co-Investigator(Kenkyū-buntansha) KOIZUMI Hiroshi  Gifu University, River Basin Research Center, Professor, 流域圏科学研究センター, 教授 (50303516)
KATO Shogo  Gifu University, Faculty of Applied Biological Sciences, Research associate, 応用生物科学部, 助手 (20324288)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2004: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2003: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsNEP / NPP / soil respiration / Carbon fix / Allometry / Biomass / Deciduous forest / Seasonality
Research Abstract

In the previous study (Komiyama et al. 2005 ; J.Trop.Ecol. 21:471-477), a common allometric equation for predicting the above-ground weight was developed for mangrove tree species based on a biological theory of statical model of plant form. In the present study, I examine whether this equation is applicable to a wide variety of tree species growing in East-Asia, including mangroves. The 387 tree data consisted of over 71 species were collected from tropical to temperate forests located in Indonesia, Thailand, and Japan. A common allometric equation between the above-ground tree weight and trunk diameter held significantly for these trees adding the wood density of trunk as a variable. The relative error between actual and estimated above-ground weight was 19.5% for this equation.
In 110-year-old secondary forest, Net primary production (NPP) of aboveground=9.96 ton/ha/year. NPP of underground=0.97 ton/ha/year. Thus, in 110-year-old secondary forest, NPP=10.93 ton/ha/year. On the other hand, net ecosystem production (NEP) is calculated by subtraction of heterotrophic respiration (HR) from NPP. HR assumes half of soil respiration and carbon content also assumes half of tree and/or litter. Thus, NEP=NPP-HR=4.98-3.71=1.27 ton carbon /ha/year, in this stand.

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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