Results 21 to 30 of about 232,366 (358)

Development of forest structure and leaf area in secondary forests regenerating on abandoned pastures in Central Amazonia [PDF]

open access: yes, 2005
The area of secondary forest (SF) regenerating from pastures is increasing in the Amazon basin; however, the return of forest and canopy structure following abandonment is not well understood. This study examined the development of leaf area index (LAI),
Aide   +55 more
core   +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

Nitrogen cycling, forest canopy reflectance, and emergent properties of ecosystems [PDF]

open access: yes, 2013
In Ollinger et al. (1), we reported that mass-based concentrations of nitrogen in forest canopies (%N) are positively associated with whole-canopy photosynthetic capacity and canopy shortwave albedo in temperate and boreal forests, the latter result ...
Frolking, Steve   +5 more
core   +2 more sources

Effect of leaf-on and leaf-off canopy conditions on forest height retrieval and modelling with ICESat-2 data

open access: yesInternational Journal of Digital Earth, 2023
Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) provides effective photon-counting light detection and ranging (LiDAR) data for estimating forest height across extensive geographical areas.
Jialu Zhou   +6 more
doaj   +1 more source

Vertical distribution of sources and sinks of volatile organic compounds within a boreal forest canopy [PDF]

open access: yesAtmospheric Chemistry and Physics, 2023
The ecosystem–atmosphere flux of biogenic volatile organic compounds (BVOCs) has important impacts on tropospheric oxidative capacity and the formation of secondary organic aerosols, influencing air quality and climate.
R. Petersen   +5 more
doaj   +1 more source

Spatial and Temporal Habitat Use of an Asian Elephant in Sumatra [PDF]

open access: yes, 2013
Increasingly, habitat fragmentation caused by agricultural and human development has forced Sumatran elephants into relatively small areas, but there is little information on how elephants use these areas and thus, how habitats can be managed to sustain ...
Fuller, Todd K.   +3 more
core   +6 more sources

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

Estimation of Forest Canopy Height and Aboveground Biomass from Spaceborne LiDAR and Landsat Imageries in Maryland

open access: yesRemote Sensing, 2018
Mapping the regional distribution of forest canopy height and aboveground biomass is worthwhile and necessary for estimating the carbon stocks on Earth and assessing the terrestrial carbon flux. In this study, we produced maps of forest canopy height and
Mengjia Wang, Rui Sun, Zhiqiang Xiao
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

Characterizing spatiotemporal variations of forest canopy gaps using aerial laser scanning data

open access: yesInternational Journal of Applied Earth Observations and Geoinformation, 2021
Spatiotemporal variations of forest canopy gaps are essential indicators for both forest dynamic monitoring by capturing their size and location variations and forest ecosystem management for tree seedling regeneration through altering the radiation ...
Zihan Du   +3 more
doaj   +1 more source

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