Search Results - "Soudani, K."

Estimating leaf mass per area and equivalent water thickness based on leaf optical properties: Potential and limitations of physical modeling and machine learning by Féret, J.-B., le Maire, G., Jay, S., Berveiller, D., Bendoula, R., Hmimina, G., Cheraiet, A., Oliveira, J.C., Ponzoni, F.J., Solanki, T., de Boissieu, F., Chave, J., Nouvellon, Y., Porcar-Castell, A., Proisy, C., Soudani, K., Gastellu-Etchegorry, J.-P., Lefèvre-Fonollosa, M.-J.

“…Leaf mass per area (LMA) and leaf equivalent water thickness (EWT) are key leaf functional traits providing information for many applications including…”
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Evaluation of the potential of MODIS satellite data to predict vegetation phenology in different biomes: An investigation using ground-based NDVI measurements by Hmimina, G., Dufrêne, E., Pontailler, J.-Y., Delpierre, N., Aubinet, M., Caquet, B., de Grandcourt, A., Burban, B., Flechard, C., Granier, A., Gross, P., Heinesch, B., Longdoz, B., Moureaux, C., Ourcival, J.-M., Rambal, S., Saint André, L., Soudani, K.

“…Vegetation phenology is the study of the timing of seasonal events that are considered to be the result of adaptive responses to climate variations on short…”
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Relationship between photochemical reflectance index and leaf ecophysiological and biochemical parameters under two different water statuses: towards a rapid and efficient correction method using real‐time measurements by HMIMINA, G., DUFRÊNE, E., SOUDANI, K.

“…The use of the photochemical reflectance index (PRI) as a promising proxy of light use efficiency (LUE) has been extensively studied, and some issues have been…”
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Deconvolution of pigment and physiologically related photochemical reflectance index variability at the canopy scale over an entire growing season by HMIMINA, G., MERLIER, E., DUFRÊNE, E., SOUDANI, K.

“…The sensitivity of the photochemical reflectance index (PRI) to leaf pigmentation and its impacts on its potential as a proxy for light‐use efficiency (LUE)…”
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Modelling interannual and spatial variability of leaf senescence for three deciduous tree species in France by Delpierre, N., Dufrêne, E., Soudani, K., Ulrich, E., Cecchini, S., Boé, J., François, C.

“…The annual timing of temperate forest leaf colouring is affected by climate change; to date, its modelling remains a challenge. We take advantage of a ca. 400…”
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Calibration and validation of hyperspectral indices for the estimation of broadleaved forest leaf chlorophyll content, leaf mass per area, leaf area index and leaf canopy biomass by le Maire, Guerric, François, Christophe, Soudani, Kamel, Berveiller, Daniel, Pontailler, Jean-Yves, Bréda, Nathalie, Genet, Hélène, Davi, Hendrik, Dufrêne, Eric

“…This article aims at finding efficient hyperspectral indices for the estimation of forest sun leaf chlorophyll content (CHL, µg cm leaf − 2 ), sun leaf mass…”
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The dynamic of the annual carbon allocation to wood in European tree species is consistent with a combined source–sink limitation of growth: implications for modelling by Guillemot, J, Martin-StPaul, N. K, Dufrêne, E, François, C, Soudani, K, Ourcival, J. M, Delpierre, N

“…The extent to which wood growth is limited by carbon (C) supply (i.e. source control) or by cambial activity (i.e. sink control) will strongly determine the…”
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Ground-based Network of NDVI measurements for tracking temporal dynamics of canopy structure and vegetation phenology in different biomes by Soudani, K., Hmimina, G., Delpierre, N., Pontailler, J.-Y., Aubinet, M., Bonal, D., Caquet, B., de Grandcourt, A., Burban, B., Flechard, C., Guyon, D., Granier, A., Gross, P., Heinesh, B., Longdoz, B., Loustau, D., Moureaux, C., Ourcival, J.-M., Rambal, S., Saint André, L., Dufrêne, E.

“…Plant phenology characterises the seasonal cyclicity of biological events such as budburst, flowering, fructification, leaf senescence and leaf fall. These…”
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Exceptional carbon uptake in European forests during the warm spring of 2007: a data-model analysis by DELPIERRE, N, SOUDANI, K, FRANÇOIS, C, KÖSTNER, B, PONTAILLER, J.-Y, NIKINMAA, E, MISSON, L, AUBINET, M, BERNHOFER, C, GRANIER, A, GRÜNWALD, T, HEINESCH, B, LONGDOZ, B, OURCIVAL, J.-M, RAMBAL, S, VESALA, T, DUFRÊNE, E

“…Temperate and boreal forests undergo drastic functional changes in the springtime, shifting within a few weeks from net carbon (C) sources to net C sinks. Most…”
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Estimation of forest leaf area index from SPOT imagery using NDVI distribution over forest stands by Davi, H., Soudani, K., Deckx, T., Dufrene, E., Le Dantec, V., FranÇois, C.

“…Leaf area index (LAI) is a key parameter of atmosphere-vegetation exchanges, affecting the net ecosystem exchange and the productivity. At regional or…”
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Forest leaf area index determination: A multiyear satellite-independent method based on within-stand normalized difference vegetation index spatial variability by le Maire, G., François, C., Soudani, K., Davi, H., Le Dantec, V., Saugier, B., Dufrêne, E.

“…The Leaf Area Index (LAI) and its spatial distribution are key features to describe the forest ecophysiological processes. A stable and reproducible…”
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Modeling annual production and carbon fluxes of a large managed temperate forest using forest inventories, satellite data and field measurements by Le Maire, G, Davi, H, Soudani, K, Francois, C, Le Dantec, V, Dufrene, E

“…We evaluated annual productivity and carbon fluxes over the Fontainebleau forest, a large heterogeneous forest region of 17,000 ha, in terms of species…”
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On the LAI of mixed soils-forests regions by Raffy, M., Soudani, K.

“…In homogeneous forest textures, it has been recently confirmed experimentally that, for sufficiently large ground surfaces, the Leaf Area Index (LAI) has weak…”
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Effect of aggregating spatial parameters on modelling forest carbon and water fluxes by Davi, H., Bouriaud, O., Dufrêne, E., Soudani, K., Pontailler, J.Y., le Maire, G., François, C., Bréda, N., Granier, A., le Dantec, V.

“…Estimating spatial variability of carbon and water fluxes is an essential task in ecological modelling. In this article, the sensitivity of carbon and water…”
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On the variability of the LAI of homogeneous covers with respect to the surface size and application by Raffy, M., Soudani, K., Trautmann, J.

“…The leaf area index (LAI) of different 100-m 2 forest plots was measured with accuracy at a resolution of 5 or 10 m 2 . The results numerically confirm that…”
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Leaf area index and canopy stratification in Scots pine ( Pinus sylvestris L.) stands by Soudani, K., Trautmann, J., Walter, J.-M. N.

“…In order to assess the contribution of each layer to effective leaf area index (LAI) in stratified forest canopies, two Scots pine stands were selected in…”
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Carbon isotopic signature of CO₂ emitted by plant compartments and soil in two temperate deciduous forests by Maunoury-Danger, Florence, Chemidlin Prevost Boure, Nicolas, Ngao, Jérôme, Berveiller, Daniel, Brechet, Claude, Dufrene, Eric, Epron, Daniel, Lata, Jean-Christophe, Longdoz, Bernard, Lelarge-Trouverie, Caroline, Pontailler, Jean-Yves, Soudani, Kamel, Damesin, Claire

“…• CONTEXT : The carbon isotope composition of the CO₂ efflux (δ¹³CE) from ecosystem components is widely used to investigate carbon cycles and budgets at…”
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Data-based investigation of the effects of canopy structure and shadows on chlorophyll fluorescence in a deciduous oak forest by Balde, Hamadou, Hmimina, Gabriel, Goulas, Yves, Latouche, Gwendal, Ounis, Abderrahmane, Soudani, Kamel

“…Data from satellite, aircraft, drone, and ground-based measurements have already shown that canopy-scale sun-induced chlorophyll fluorescence (SIF) is tightly…”
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Synergy between TROPOMI sun-induced chlorophyll fluorescence and MODIS spectral reflectance for understanding the dynamics of gross primary productivity at Integrated Carbon Observatory System (ICOS) ecosystem flux sites by Balde, Hamadou, Hmimina, Gabriel, Goulas, Yves, Latouche, Gwendal, Soudani, Kamel

“…An accurate estimation of vegetation gross primary productivity (GPP), which is the amount of carbon taken up by vegetation through photosynthesis for a given…”
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A survey of proximal methods for monitoring leaf phenology in temperate deciduous forests by Soudani, Kamel, Delpierre, Nicolas, Berveiller, Daniel, Hmimina, Gabriel, Pontailler, Jean-Yves, Seureau, Lou, Vincent, Gaëlle, Dufrêne, Ãric

“…Tree phenology is a major driver of forest–atmosphere mass and energy exchanges. Yet, tree phenology has rarely been monitored in a consistent way throughout…”
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