气候变化领域集成服务门户(CCPortal): Wood Basic Density in Large Trees: Impacts on Biomass Estimates in the Southwestern Brazilian Amazon

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DOI	10.3390/f15050734
	Wood Basic Density in Large Trees: Impacts on Biomass Estimates in the Southwestern Brazilian Amazon
	Romero, Flora Magdaline Benitez; Novais, Thais de Nazare Oliveira; Jacovine, Laercio Antonio Goncalves; Bezerra, Eronildo Braga; Lopes, Rosana Barbosa de Castro; de Holanda, Juliana Sousa; Reyna, Edi Flores; Fearnside, Philip Martin
发表日期	2024
EISSN	1999-4907
起始页码	15
结束页码	5
卷号	15 期号:5
英文摘要	Wood basic density (WD) plays a crucial role in estimating forest biomass; moreover, improving wood-density estimates is needed to reduce uncertainties in the estimates of tropical forest biomass and carbon stocks. Understanding variations in this density along the tree trunk and its impact on biomass estimates is underexplored in the literature. In this study, the vertical variability of WD was assessed along the stems of large trees that had a diameter at breast height (DBH) >= 50 cm from a dense ombrophilous forest on terra firme (unflooded uplands) in Acre, Brazil. A total of 224 trees were sampled, including 20 species, classified by wood type. The average WD along the stem was determined by the ratio of oven-dry mass to saturated volume. Five models were tested, including linear and nonlinear ones, to fit equations for WD, selecting the best model. The variation among species was notable, ranging from 0.288 g cm-3 (Ceiba pentandra, L., Gaertn) to 0.825 g cm-3 (Handroanthus serratifolius, Vahl., S. Grose), with an average of 0.560 g cm-3 (+/- 0.164, standard deviation). Significant variation was observed among individuals, such as in Schizolobium parahyba var. amazonicum (H. ex D.), which ranged from 0.305 to 0.655 g cm-3. WD was classified as low (<= 0.40 g cm-3), medium (0.41-0.60 g cm-3), and high (>= 0.61 g cm-3). The variability in WD along the stem differs by wood type. In trees with low-density wood, density shows irregular variation but tends to increase along the stem, whereas it decreases in species with medium- and high-density wood. The variation in WD along the stem can lead to underestimations or overestimations, not only in individual trees and species but also in total stocks when estimating forest biomass. Not considering this systematic bias results in significant errors, especially in extrapolations to vast areas, such as the Amazon.
英文关键词	tropical forest; wood density; climate change; commercial species; Acre; Brazil
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:001232450300001
来源期刊	FORESTS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304652
作者单位	Universidade Federal de Amazonas; Universidade Federal de Amazonas; Universidade Federal de Amazonas; Universidade Federal de Amazonas
推荐引用方式 GB/T 7714	Romero, Flora Magdaline Benitez,Novais, Thais de Nazare Oliveira,Jacovine, Laercio Antonio Goncalves,et al. Wood Basic Density in Large Trees: Impacts on Biomass Estimates in the Southwestern Brazilian Amazon[J],2024,15(5).
APA	Romero, Flora Magdaline Benitez.,Novais, Thais de Nazare Oliveira.,Jacovine, Laercio Antonio Goncalves.,Bezerra, Eronildo Braga.,Lopes, Rosana Barbosa de Castro.,...&Fearnside, Philip Martin.(2024).Wood Basic Density in Large Trees: Impacts on Biomass Estimates in the Southwestern Brazilian Amazon.FORESTS,15(5).
MLA	Romero, Flora Magdaline Benitez,et al."Wood Basic Density in Large Trees: Impacts on Biomass Estimates in the Southwestern Brazilian Amazon".FORESTS 15.5(2024).