Results 11 to 20 of about 31,069 (262)

SPECTRAL CHARACTERIZATION OF A CLOSED CANOPY AND OPEN CANOPY FOREST IN NORTHERN SIERRA MADRE NATURAL PARK [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
Forest lands play crucial roles in nutrient recycling and climate regulation. The change of closed canopy forests to open canopy forests may indicate disturbance within the closed canopy forest.
C. Vidad   +8 more
doaj   +1 more source

PSOOptimizedFast Segmentation Algorithm for 3D Otsu Forest Canopy Image

open access: yesJournal of Harbin University of Science and Technology, 2019
Forest canopy image segmentation is a key step to forest canopy parameters using digital image processing methods According to the characteristics of forest canopy fisheye images with complex background and high resolution, this paper proposed a PSO ...
ZHU Liang-kuan   +3 more
doaj   +1 more source

Forest canopy analysis in the Alpine environment: comparison among assessment methods

open access: yesForest@, 2013
Forest canopy analysis in the Alpine environment: comparison among assessment methods. Forest canopy is an important ecological feature of forest stands and can be expressed as Leaf Area Index (LAI) or canopy cover percentage.
Pastorella F, Paletto A
doaj   +1 more source

Estimating Forest Canopy Height Using MODIS BRDF Data Emphasizing Typical-Angle Reflectances

open access: yesRemote Sensing, 2019
Forest-canopy height is an important parameter for the estimation of forest biomass and terrestrial carbon flux and climate-change research at regional and global scales.
Lei Cui   +9 more
doaj   +1 more source

Phylogenetic Structure of Tree Species across Different Life Stages from Seedlings to Canopy Trees in a Subtropical Evergreen Broad-Leaved Forest.

open access: yesPLoS ONE, 2015
Investigating patterns of phylogenetic structure across different life stages of tree species in forests is crucial to understanding forest community assembly, and investigating forest gap influence on the phylogenetic structure of forest regeneration is
Yi Jin, Hong Qian, Mingjian Yu
doaj   +1 more source

Understanding opportunities for urban forest expansion to inform goals: Working toward a virtuous cycle in New York City

open access: yesFrontiers in Sustainable Cities, 2022
Urban forests are critical infrastructure for mitigating environmental and social challenges cities face. Municipalities and non-governmental entities, among others, often set goals (e.g., tree planting or canopy targets) to support urban forests and ...
Michael L. Treglia   +4 more
doaj   +1 more source

Influence of voxel size on forest canopy height estimates using full-waveform airborne LiDAR data

open access: yesForest Ecosystems, 2020
Background Forest canopy height is a key forest structure parameter. Precisely estimating forest canopy height is vital to improve forest management and ecological modelling.
Cheng Wang   +5 more
doaj   +1 more source

Weak Environmental Controls of Tropical Forest Canopy Height in the Guiana Shield

open access: yesRemote Sensing, 2016
Canopy height is a key variable in tropical forest functioning and for regional carbon inventories. We investigate the spatial structure of the canopy height of a tropical forest, its relationship with environmental physical covariates, and the ...
Youven Goulamoussène   +5 more
doaj   +1 more source

Health assessment of plantations based on LiDAR canopy spatial structure parameters

open access: yesInternational Journal of Digital Earth, 2022
The Yellow River Delta (YRD) has China's largest artificial Robinia pseudoacacia forest, which was planted in the late 1970s and suffered extensive dieback in the 1990s.
Pengyu Meng   +7 more
doaj   +1 more source

Can increased training and awareness take forest research to new heights?

open access: yesTrees, Forests and People, 2020
Forest canopies contribute significantly to global forest biodiversity and ecosystem functioning, yet are declining and understudied. One reason for a knowledge gap is that accessing forest canopies can be difficult and dangerous.
David L. Anderson   +5 more
doaj   +1 more source

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