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In situ measurement of Scots pine needle PRI
(BMC, 2017)
Background: The Photochemical Reflectance Index (PRI) calculated from narrow-band spectral reflectance data is a vegetation index which is increasingly used as an indicator of photosynthetic activity. The leaf-level link ...
LIDAR-based estimation of leaf area index on Holm oak [Quercus ilex L. subsp. ballota (Desf.) Samp.] trees
(CSIC, 2010)
Index (LAI) of Quercus ilex by calculating the laser-intercepted rate through the forest canopy using LiDAR data. LAI was measured in 40 trees with a hemispheric camera (NIKON Coolpix 4500) and coincided with the acquisition ...
Early diagnosis of vegetation health from high-resolution hyperspectral and thermal imagery: lessons learned from empirical relationships and radiative transfer modelling
(Springer, 2019)
Purpose of Review We provide a comprehensive review of the empirical and modelling approaches used to quantify the radiation–vegetation interactions related to vegetation temperature, leaf optical properties linked to ...
Archaeological, Palynological and Geological Contributions to Landscape Reconstruction in the Alluvial Plain of the Guadalquivir River at San Bernardo, Sevilla (Spain)
(Elsevier, 1998)
Archaeological, palynological and geological studies carried out in the San Bernardo district (Sevilla) allowed us to reconstruct the changes that have taken place in vegetation and landscape relief over the areas studied. ...
Divergent abiotic spectral pathways unravel pathogen stress signals across species
(Springer Nature, 2021)
Plant pathogens pose increasing threats to global food security, causing yield losses that exceed 30% in food-deficit regions. Xylella fastidiosa (Xf) represents the major transboundary plant pest and one of the world’s ...
Deriving predictive relationships of carotenoid content at the canopy level in a conifer forest using hyperspectral imagery and model simulation
(IEEE, 2014)
Recent studies have demonstrated that the R570/R515 index is highly sensitive to carotenoid (Cx + c) content in conifer forest canopies and is scarcely influenced by structural effects. However, validated methods for the ...
Global ecosystem thresholds driven by aridity
(American Association for the Advancement of Science, 2020)
Aridity, increasing worldwide due to climate change, affects the structure and functioning of dryland ecosystems. Whether aridification leads to gradual (vs. abrupt) and systemic (vs. specific) ecosystem changes is largely ...
Analysis of postfire vegetation dynamics of Mediterranean shrub species based on terrestrial and NDVI data
(SpringerLink, 2009)
The present study offers an analysis of regeneration patterns and diversity dynamics after a wildfire, which occurred in 1993 and affected about 7000 ha in southern Spain. The aim of the work was to analyze the rule in the ...
Carotenoid content estimation in a heterogeneous conifer forest using narrow-band indices and PROSPECT + DART simulations
(Science Direct, 2012)
The present study explored the use of narrow-band indices formulated in the visible spectral region at leaf and canopy levels to estimate carotenoid content. The research area was a pine forest affected by decline processes. ...
Estimating leaf carotenoid content in vineyards using high resolution hyperspectral imagery acquired from an unmanned aerial vehicle (UAV)
(Science Direct, 2013)
Chlorophyll a+b (Ca+b) and carotenoids (Cx+c) are leaf pigments associated with photosynthesis, participation in light harvesting and energy transfer, quenching and photoprotection. This manuscript makes progress on ...