Comparison of terrestrial LiDAR and digital hemispherical photography for estimating leaf angle distribution in European broadleaf beech forests

山毛榉 激光雷达 遥感 点云 叶面积指数 同质性(统计学) 地理 林业 环境科学 计算机科学 地质学 生态学 统计 数学 生物 人工智能
作者
Jing Liu,Zhihui Wang,A.K. Skidmore,Simon Jones,Marco Heurich,Burkhard Beudert,Joe Premier
出处
期刊:Isprs Journal of Photogrammetry and Remote Sensing 卷期号:158: 76-89 被引量:13
标识
DOI:10.1016/j.isprsjprs.2019.09.015
摘要

Leaf inclination plays a crucial role in regulating the radiation, carbon and water fluxes in plant canopies. Accurate measurement of the probability density function of leaf inclination (i.e., the leaf angle distribution or leaf inclination distribution function (LIDF)), is very important for modelling photosynthesis as well as measuring leaf area index. In spite of its importance, in situ measurement of LIDF is very challenging. Both digital hemispherical photography (DHP) and terrestrial LiDAR (TLS) have been used to measure LIDF. However, the consistency and relative accuracy of these two techniques has never been evaluated. In this research, we aimed to evaluate which in situ technique, either DHP or TLS, could measure LIDF more accurately, with respect to both field-based and synthetic datasets. The field-based datasets were collected from 36 natural European beech stands covering a range of forest structures. The synthetic datasets were generated from 44 virtual forest scenes using TLS and DHP simulators. Due to the inability of differing leaf and woody materials in DHP, the average plant inclination angle (θ¯) from DHP and TLS was selected for LIDF comparison. The average inclination angle (θ¯) was retrieved from TLS point clouds using a geometric method, and from DHP using three gap fraction inversion methods including the NC method (Norman and Campbell, 1989), as well as the CAN-EYE and Hemisfer software. Results from the field-based datasets showed a significant difference and inconsistency between the average inclination angle (θ¯) retrieved from TLS and DHP (respectively θ¯∈(40°, 58°) from TLS, (15°, 86°) from DHP NC, (36°, 78°) from DHP CAN-EYE, (0°, 67°) from DHP Hemisfer). Results from the synthetic datasets demonstrated that the accuracy of θ¯ from TLS was considerably higher than that obtained from DHP (R2: 0.90 > 0.74; RMSE: 5.38° < 13.30°). This study demonstrated that the LIDF estimated from TLS and DHP were not coherent. Based on the experimental results as well as deduction from theoretical arguments, we recommended using TLS when measuring leaf inclination in broadleaf forests, especially for stands with a heterogeneous structure.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
CT发布了新的文献求助10
1秒前
传奇3应助lllllllll采纳,获得10
1秒前
852应助刘步遥采纳,获得10
2秒前
FashionBoy应助lilei采纳,获得10
2秒前
淘气科研发布了新的文献求助10
2秒前
2秒前
13发布了新的文献求助10
2秒前
阳光土豆应助Whale采纳,获得10
2秒前
朋克发布了新的文献求助10
3秒前
3秒前
共享精神应助努努采纳,获得10
4秒前
章宇发布了新的文献求助10
4秒前
4秒前
6秒前
李小鑫吖发布了新的文献求助10
7秒前
7秒前
chen发布了新的文献求助10
7秒前
7秒前
英俊的铭应助思维隋采纳,获得10
8秒前
8秒前
hokin33完成签到,获得积分10
8秒前
9秒前
178181发布了新的文献求助10
9秒前
9秒前
9秒前
9秒前
沉烟飞鸿发布了新的文献求助10
10秒前
10秒前
10秒前
火锅完成签到,获得积分10
10秒前
10秒前
领导范儿应助CT采纳,获得10
11秒前
11秒前
12秒前
12秒前
12秒前
squirrelcone完成签到 ,获得积分10
13秒前
13秒前
13秒前
13秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 1000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 310
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3979196
求助须知:如何正确求助?哪些是违规求助? 3523110
关于积分的说明 11216298
捐赠科研通 3260559
什么是DOI,文献DOI怎么找? 1800098
邀请新用户注册赠送积分活动 878823
科研通“疑难数据库(出版商)”最低求助积分说明 807092