Results 1 to 10 of about 31,615 (293)

MLAOS: A Multi-Point Linear Array of Optical Sensors for Coniferous Foliage Clumping Index Measurement [PDF]

Sensors, 2014
The canopy foliage clumping effect is primarily caused by the non-random distribution of canopy foliage. Currently, measurements of clumping index (CI) by handheld instruments is typically time- and labor-intensive.
Yonghua Qu, Lizhe Fu, Wenchao Han, Yeqing Zhu, Jindi Wang   +4 more
doaj   +5 more sources

Retrieving Forest Canopy Elements Clumping Index Using ICESat GLAS Lidar Data [PDF]

Remote Sensing, 2021
Clumping index (CI) is a canopy structural variable important for modeling the terrestrial biosphere, but its retrieval from remote sensing data remains one of the least reliable.
Lei Cui, Ziti Jiao, Kaiguang Zhao, Mei Sun, Yadong Dong, Siyang Yin, Xiaoning Zhang, Jing Guo, Rui Xie, Zidong Zhu, Sijie Li, Yidong Tong   +11 more
doaj   +2 more sources

The causal relationship between body mass index and perianal abscess: a Mendelian randomization study [PDF]

BMC Gastroenterology
Background Observational studies suggest an association between elevated body mass index (BMI) and perianal abscess risk, but residual confounding and reverse causality limit causal inference.
Long Wu, Huan Wu, Xiao-Yun Li, Yun-Huan Zhen, Hai-Yang Li   +4 more
doaj   +2 more sources

Evaluation of Clumping Effects on the Estimation of Global Terrestrial Evapotranspiration

Remote Sensing, 2021
In terrestrial ecosystems, leaves are aggregated into different spatial structures and their spatial distribution is non-random. Clumping index (CI) is a key canopy structural parameter, characterizing the extent to which leaf deviates from the random ...
Bin Chen, Xuehe Lu, Shaoqiang Wang, Jing M. Chen, Yang Liu, Hongliang Fang, Zhenhai Liu, Fei Jiang, Muhammad Altaf Arain, Jinghua Chen, Xiaobo Wang   +10 more
doaj   +1 more source

Clumping Morphology Influences Virulence Uncoupled from Echinocandin Resistance in Candida glabrata

Microbiology Spectrum, 2022
Here, we report two paired sets of an index wild-type Candida glabrata bloodstream isolate and subsequent echinocandin-resistant FKS mutant. One paired set exhibited a higher proportion of clumping cells and was more virulent in the invertebrate host ...
Chenlin Hu, Gary Fong, Sebastian Wurster, Dimitrios P. Kontoyiannis, Nicholas D. Beyda   +4 more
doaj   +1 more source

New insights of global vegetation structural properties through an analysis of canopy clumping index, fractional vegetation cover, and leaf area index

Science of Remote Sensing, 2021
Canopy clumping index (CI), fractional vegetation cover (FVC), and leaf area index (LAI) are important vegetation structural variables. Characterization of the spatial and temporal variations of these variables is important for understanding the global ...
Hongliang Fang, Sijia Li, Yinghui Zhang, Shanshan Wei, Yao Wang   +4 more
doaj   +1 more source

Correcting Crown-Level Clumping Effect for Improving Leaf Area Index Retrieval From Large-Footprint LiDAR: A Study Based on the Simulated Waveform and GLAS Data

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
The demand for leaf area index (LAI) retrieval from spaceborne full-waveform LiDAR increases due to its direct sampling of the three-dimensional forest structure at a near-global scale.
Hailan Jiang, Guangjian Yan, Yiyi Tong, Shiyu Cheng, Xuebo Yang, Ronghai Hu, Linyuan Li, Xihan Mu, Donghui Xie, Wuming Zhang, Guoqing Zhou, Felix Morsdorf   +11 more
doaj   +1 more source

A BOX-COUNTING METHOD TO CHARACTERIZE DEGREES OF FOLIAGE CLUMPING USING AIRBORNE AND SIMULATED LIDAR DATA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
Monitoring forest productivity and health is key to sustainable ecosystem management and informed decision making. A key parameter used in monitoring forest resources is the leaf area index (LAI), which is defined as the one-sided leaf area per unit ...
M. van Leeuwen, J. A. N. van Aardt, T. Kampe, K. Krause   +3 more
doaj   +1 more source

Photosynthetically Active Radiation and Foliage Clumping Improve Satellite-Based NIRv Estimates of Gross Primary Production

Remote Sensing, 2023
Monitoring gross primary production (GPP) is necessary for quantifying the terrestrial carbon balance. The near-infrared reflectance of vegetation (NIRv) has been proven to be a good predictor of GPP.
Iolanda Filella, Adrià Descals, Manuela Balzarolo, Gaofei Yin, Aleixandre Verger, Hongliang Fang, Josep Peñuelas   +6 more
doaj   +1 more source

Spatio-Temporal Characteristics and Driving Factors of the Foliage Clumping Index in the Sanjiang Plain from 2001 to 2015

Remote Sensing, 2021
The Sanjiang Plain is the largest agricultural reclamation area and the biggest marsh area in China. The regional vegetation coverage in this area is vital to local ecological systems, and vegetation growth is affected by natural and anthropogenic ...
Kehong Hu, Zhen Zhang, Hongliang Fang, Yijie Lu, Zhengnan Gu, Min Gao   +5 more
doaj   +1 more source