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Estimation of Individual Tree Biomass in Natural Secondary Forests Based on ALS Data and WorldView-3 Imagery

Yinghui Zhao, Ye Ma, Lindi Quackenbush, Zhen Zhen
2022 Remote Sensing  
The average individual tree AGB was 125.32 kg and the forest AGB was 113.58 Mg/ha in the Maoershan study site in Heilongjiang Province, China.  ...  Accurately estimating individual tree AGB is a requisite for accurate forest carbon stock assessment of natural secondary forests (NSFs).  ...  China, who participated in the National Forest Survey and samples plots in the Maoershan Experimental Forest Farm in 2019 and collected the data for this study.  ... 
doi:10.3390/rs14020271 fatcat:mzjv54eg7ndllnolhcp5otaj3q

Spatial and temporal variations of forest LAI in China during 2000–2010

YiBo Liu, WeiMin Ju, JingMing Chen, GaoLong Zhu, BaiLing Xing, JingFang Zhu, MingZhu He
2012 Chinese Science Bulletin  
Annual mean LAI decreased by more than 1.0 in some areas. leaf area index, clumping index, forests of China, MODIS, spatial and temporal variations Citation:  ...  Forests are crucial terrestrial ecosystems. Their leaf area index (LAI) is a key parameter determining the exchange of matter and energy between the atmosphere and the ground surface.  ...  Leaf Area Index (LAI) is usually defined as one half of the total green leaf area per unit ground surface area [1] .  ... 
doi:10.1007/s11434-012-5064-8 fatcat:5inrsvktgva6temouk7btztene

The Effect of Synergistic Approaches of Features and Ensemble Learning Algorith on Aboveground Biomass Estimation of Natural Secondary Forests Based on ALS and Landsat 8

Chunyu Du, Wenyi Fan, Ye Ma, Hung-Il Jin, Zhen Zhen
2021 Sensors  
This study provides technical support for a wall-to-wall AGB mapping of NSFs of northeastern China using efficient features and algorithms.  ...  of different data and ensemble learning algorithms have not been fully investigated, especially for natural secondary forests (NSFs) with complex structures.  ...  The highest mountain is Maoer Mountain, with an elevation of 805 m. The total area of the forest farm is 26,496 ha, which belongs to a typical natural secondary forest in northeastern China.  ... 
doi:10.3390/s21175974 pmid:34502867 fatcat:d4ejnjscivcmjplh5mkia7fhri

Spatial and Seasonal Variations of Standardized Photosynthetic Parameters under Different Environmental Conditions for Young Planted Larix olgensis Henry Trees

Qiang Liu, Fengri Li
2018 Forests  
In addition, different gradients of environmental conditions also influenced the values and the range of the vertical variation in photosynthesis.  ...  Understanding the spatial and seasonal variations in leaf physiology is critical for accurately modeling the carbon uptake, physiological processes and growth of entire canopies and stands.  ...  We would like to express our appreciation to three anonymous reviewers for their constructive comments on the manuscript. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/f9090522 fatcat:lw7z7rtmezhwbaa72pqoocgqia