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
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
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133086
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]. Forest Ecology and Management,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.,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".458(2020).