Results 81 to 90 of about 183,096 (290)

Impact of Base-to-Height Ratio on Canopy Height Estimation Accuracy of Hemiboreal Forest Tree Species by Using Satellite and Airborne Stereo Imagery

open access: yesRemote Sensing, 2021
The present study assessed the large-format airborne (UltraCam) and satellite (GeoEye1 and Pleiades1B) image-based digital surface model (DSM) performance for canopy height estimation in predominantly mature, closed-canopy Latvian hemiboreal forestland ...
Grigorijs Goldbergs
doaj   +1 more source

Canopy and Terrain Height Retrievals with ICESat-2: A First Look [PDF]

open access: yesRemote Sensing, 2019
NASA’s Ice, Cloud and Land Elevation Satellite-2 (ICESat-2) launched in fall 2018 and has since collected continuous elevation data over the Earth’s surface. The primary scientific objective is to measure the cryosphere for studies related to land ice and sea ice characteristics.
Amy L. Neuenschwander, Lori A. Magruder
openaire   +2 more sources

Habitat complexity and prey composition shape an apex predator's habitat use across contrasting landscapes

open access: yesEcography, EarlyView.
The spatial ecology of stalk‐and‐ambush predators like the Eurasian lynx Lynx lynx depends on prey availability and environmental features, yet the relative roles of these factors remain unclear at large spatial scales. In this study, we analysed lynx habitat use across central and southern Finland using snow‐track data from the Wildlife Triangle ...
Francesca Malcangi   +4 more
wiley   +1 more source

Boundary-layer flow within and above a forest canopy of variable density

open access: yes, 2012
An analytical model is developed for flow within and above a forest canopy with a slowly varying canopy density. Results are compared with existing analytical models for flow over a surface with slowly varying roughness length, and also with numerical ...
Ross, AN
core   +1 more source

Vegetation on the move: elevational shifts and greening dynamics across the Himalayan alpine zone

open access: yesEcography, EarlyView.
This study investigates alpine ‘vegetation line' (the upper limit of continuous plant community) dynamics in the Himalayan alpine zone (HAZ) over a 24‐year timescale (1999–2022) using maximum NDVI products derived from Landsat series datasets, adjusted for sampling bias using phenological modelling.
Ruolin Leng   +5 more
wiley   +1 more source

Harnessing the power of machine and deep learning for transferring joint species distribution models considering the structure of biotic interactions

open access: yesEcography, EarlyView.
The transferability of single or joint species distribution models ((j)SDMs) depends on their ability to predict beyond the observed environmental range and to remain consistent despite shifts in biotic interactions. Transfer accuracy may be improved by recent advances in the application of deep learning that provide greater flexibility and potentially
Marco Basile   +44 more
wiley   +1 more source

Canopy reflectance modeling in a tropical wooded grassland [PDF]

open access: yes
Geometric/optical canopy reflectance modeling and spatial/spectral pattern recognition is used to study the form and structure of savanna in West Africa.
Franklin, Janet, Simonett, David
core   +4 more sources

LiDAR shows that higher forests have more slender trees [PDF]

open access: yes, 2012
High-density Airborne Laser Scanning was used to derive the Canopy Height Model (CHM) of an experimental forest site in the neotropics (Paracou, French Guiana).
Blanc, Lilian   +3 more
core  

Towards a universal lidar canopy height indicator

open access: yesCanadian Journal of Remote Sensing, 2006
A light detection and ranging (lidar) canopy height study was conducted with 13 datasets collected using four different models of airborne laser terrain mapper (ALTM) sensors over 13 widely variable vegetation types ranging in average height from
Chris Hopkinson   +4 more
openaire   +1 more source

Biodiversity and biomass co‐regulate urban forest drought resistance

open access: yesFrontiers in Ecology and the Environment, EarlyView.
Severe droughts induced by climate change present substantial challenges to urban forests. While the role that species richness plays in enhancing drought resistance in natural ecosystems has been highlighted in previous studies, its impact within urban forests remains less understood.
Xiaoling Wang   +5 more
wiley   +1 more source

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