气候变化领域集成服务门户(CCPortal): Savanna vegetation structure in the Brazilian Cerrado allows for the accurate estimation of aboveground biomass using terrestrial laser scanning

CCPortal

DOI	10.1016/j.foreco.2019.117798
	Savanna vegetation structure in the Brazilian Cerrado allows for the accurate estimation of aboveground biomass using terrestrial laser scanning
	Zimbres B.; Shimbo J.; Bustamante M.; Levick S.; Miranda S.; Roitman I.; Silvério D.; Gomes L.; Fagg C.; Alencar A.
发表日期	2020
ISSN	0378-1127
卷号	458
英文摘要	Understanding structural variations in natural systems can help us understand their responses to disturbance and environmental changes and plan for the mitigation of human-induced impacts. Terrestrial laser scanning (TLS) is a technological solution to quickly and accurately capture and model vegetation structure. In the Brazilian Cerrado biome, characterized by highly heterogeneous plant formations and marked seasonality, TLS may help improve aboveground biomass (AGB) estimates. This study aimed to use single-scan TLS-derived metrics to predict plot-scale aboveground biomass for three vegetation types with high structural diversity and biomass content (woodland savanna, forested savanna, and gallery forest). Ten plots were scanned in each vegetation type, and variables related to point density at different strata and height distribution were extracted from the point cloud to predict AGB measured in local field inventories. The woodland savanna provided good fit models with only two metrics (rainy season: proportion of points below 1.37 m and height of the 99th percentile; adj-R2 = 0.92, RMSE (root mean square error) = 2.67 Mg/ha or 12%; and dry season: height of the 20th and the 99th percentiles; adj-R2 = 0.88, RMSE = 3.32 Mg/ha or 15%). The model for the forested savanna had relatively less explanatory power with one influential predictor (forested savanna: height of the 20th percentile; adj-R2 = 0.58, RMSE = 6.85 Mg/ha or 21%). For the gallery forest, however, the canopy structure could not be adequately characterized due to occlusion of laser returns by dense sub-canopy strata. Our study shows the strong potential of the terrestrial LiDAR technology for estimation of plot-based biomass across diverse savanna vegetation types, where the sparse tree structure allows for better laser penetration the accurate generation of height profiles. © 2019 The Authors
英文关键词	Allometric equation; Carbon stock; Forest; Terrestrial LiDAR; Three-dimensional model; TLS
语种	英语
scopus关键词	Biomass; Forestry; Laser applications; Mean square error; Optical radar; Seebeck effect; Steel beams and girders; Thallium; Vegetation; Allometric equations; Carbon stocks; Forest; Terrestrial lidars; Three-dimensional model; Surveying instruments; aboveground biomass; accuracy assessment; carbon sequestration; cerrado; forest ecosystem; laser method; lidar; savanna; three-dimensional modeling; vegetation structure; Biomass; Estimation; Forestry; Height; Plants; Thallium
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155550
作者单位	Ecology Department, University of Brasilia, Campus Darcy Ribeiro, Brasilia, 70910-900, Brazil; Amazon Environmental Research Institute (IPAM), SCN 211, bloco B, sala 201, Brasilia, 70836-520, Brazil; Tropical Ecosystems Research Centre, CSIRO Land and Water, 564 Vanderlin Dr, Berrimah, NT 0828, Australia; Goiás State University, Rua S-7 s/n Bairro Sul, Palmeiras de Goiás76190-000, Brazil; Ceilandia College, University of Brasilia, Centro Metropolitano, Ceilândia Sul, Brasilia, 72220-275, Brazil
推荐引用方式 GB/T 7714	Zimbres B.,Shimbo J.,Bustamante M.,et al. Savanna vegetation structure in the Brazilian Cerrado allows for the accurate estimation of aboveground biomass using terrestrial laser scanning[J],2020,458.
APA	Zimbres B..,Shimbo J..,Bustamante M..,Levick S..,Miranda S..,...&Alencar A..(2020).Savanna vegetation structure in the Brazilian Cerrado allows for the accurate estimation of aboveground biomass using terrestrial laser scanning.Forest Ecology and Management,458.
MLA	Zimbres B.,et al."Savanna vegetation structure in the Brazilian Cerrado allows for the accurate estimation of aboveground biomass using terrestrial laser scanning".Forest Ecology and Management 458(2020).