Results 11 to 20 of about 10,963 (248)

Validation of the MODIS Clumping Index: A Case Study in Saihanba National Forest Park

Remote Sensing
The clumping index (CI) describes the level of foliage grouping relative to the random distribution within the canopy. It plays a vital role in the derivation of other important parameters (e.g., the leaf area index, (LAI)) that are usually employed in ...
Siyang Yin, Ziti Jiao, Yadong Dong, Lei Cui, Anxin Ding, Feng Qiu, Qian Zhang, Yongguang Zhang, Xiaoning Zhang, Jing Guo, Rui Xie, Yidong Tong, Zidong Zhu, Sijie Li, Chenxia Wang, Jiyou Jiao   +15 more
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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

Variation of Clumping Index With Zenith Angle for Forest Canopies

IEEE Transactions on Geoscience and Remote Sensing, 2022
Canopy clumping index (CI) characterizes the extent of the nonrandom spatial distribution of foliage elements within a canopy and is critical for determining the radiative transfer, photosynthesis, and transpiration processes in the canopy. It is widely perceived that the CI increases with zenith angle ( θ ), because between-crown gaps decrease in size
Geng, Jun, Tu, Lili, Chen, Jing, Roujean, Jean-Louis, Yuan, Gang, Hu, Ronghai, Huang, Jianwei, Zhang, Chunju, Ye, Zhourun, Qu, Xiaochuan, Yu, Min, Zhu, Yongchao, Tian, Qingjiu   +12 more
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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
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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
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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
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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
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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
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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
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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
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