A5061185035- Forest ecology and management
- Forest Management and Policy
- Remote Sensing and LiDAR Applications
- Agriculture and Rural Development Research
- Ecology and Vegetation Dynamics Studies
- Greenhouse Technology and Climate Control
- Forest Biomass Utilization and Management
- French Urban and Social Studies
- Plant Water Relations and Carbon Dynamics
- Forest Ecology and Biodiversity Studies
- Tree Root and Stability Studies
- Tree-ring climate responses
- African Botany and Ecology Studies
- Leaf Properties and Growth Measurement
- Horticultural and Viticultural Research
- Botany and Plant Ecology Studies
- Cultural Insights and Digital Impacts
- Social Sciences and Governance
- Plant Physiology and Cultivation Studies
- Wood Treatment and Properties
- Species Distribution and Climate Change
- Plant Ecology and Soil Science
- Agroforestry and silvopastoral systems
- Economic and Technological Developments in Russia
- Botanical Research and Applications
Sorbonne Paris Cité
2016-2017
Université Paris Cité
2016-2017
Sorbonne Université
2016-2017
Université Claude Bernard Lyon 1
1985-2016
AgroParisTech
2016
Département Écologie des Forêts, Prairies et Milieux Aquatiques
2016
École Polytechnique
2016
Biologie intégrée pour la valorisation de la diversité des arbres et de la forêt
2016
UMR Botanique et Modélisation de l’Architecture des Plantes et des végétations
1997-2014
Institut National de la Recherche Agronomique
2012
Abstract The forests of the Jura mountains are among most productive in France. This study developed quantitative models to improve management these mixed fir, spruce, and beech. A nonlinear matrix model stand growth was estimated validated with medium-term projections simulations long-term dynamics. ecological criteria were Shannon's index tree diversity by species size, minimum number trees any species-size class, basal area. economic present value harvests, gross or net growing stock,...
Abstract. This paper aims at proposing efficient vegetation sampling strategies. It describes how the estimation of species richness and diversity moist evergreen forest is affected by (1) design (simple random sampling, cluster systematic stratified sampling); (2) choice estimators (number observed vs . non‐parametric estimators) (3) index (Simpson Shannon). Two sites are studied: a 28‐ha area situated in Western Ghats India 25‐ha located Pasoh Peninsular Malaysia. The results show that:...
A new approach for modelling plant growth using the software AMAPpara is presented.This takes into consideration knowledge about architecture which has been accumulated at Plant Modelling Unit of CIRAD several years, and introduces physiological concepts in order to simulate dynamic functioning trees.The considered as a serial connection vegetative organs conduct water from roots leaves.Another simple description network parallel pipes also presented allows an analytical formulation be...
This paper is part of a study proposing new method for assessing the quality wood resources from regional inventory data.One component this simulation solfware that requires detailed input describing tree branchiness and morphology.The specific purpose to construct models predict main characteristics crown Norway spruce.One hundred seventeen spruce trees sampled in northeastern France have been de- scribed detail.The position different parts crown, size, insertion angle, num- ber whorl...
The dynamical system of plant growth GREENLAB was originally developed for individual plants, without explicitly taking into account interplant competition light. Inspired by the models in context forest science mono-specific stands, we propose to adapt method crown projection onto x-y plane GREENLAB, order study effects density on resource acquisition and architectural development.The empirical production equation is extrapolated stands computing exposed photosynthetic foliage area each...
This paper is part of a study which aims at proposing new method for assessing the wood quality Norway spruce from northeastern France.One component this simulation software that requires detailed inputs describing tree branchiness and morphology.The specific purpose to present model predicts maximum limbsize vari- ous points along stem.The dependent variable diameter per annu- al growth unit.The independent variables are relative distance unit top stem some combinations standard whole-tree...
The development of functional-structural plant models has opened interesting perspectives for a better understanding growth as well potential applications in breeding or decision aid farm management. Parameterization such is however difficult issue due to the complexity involved biological processes and interactions between these processes. estimation parameters from experimental data by inverse methods thus crucial step. This paper presents some results discussions first steps towards...
Abstract. A large number of plots (306) were sampled for floristic data and variables soil nutrient availability in a wide range forest conditions the Vosges mountains (NE France). Half used to model species presence/absence as function nutritional using two numerical methods: parametric logistic regression non‐parametric Kernel estimation. Species responses established calcium, aluminium, Ca : Al ratio, base saturation, pH C:N measured upper horizon. The other half predict these with...
La définition des sciences participatives est large : « formes de production connaissances scientifiques auxquelles acteurs non-scientifiques-professionnels, qu'il s'agisse d'individus ou groupes, participent façon active et délibérée ». Elles donnent lieu à un foisonnement sémantique important, tant en français qu'en anglais. Une typologie établie sur la base d'une analyse scientométrique. Les projets connaissent une évolution remarquable ces dernières années et, parallèle leur...
We built a simple tree growth model for Norway spruce (Picea abies (L.) Karst.) that describes the biomass and stem radial of one in stand. Growth is controlled by an external height function accounts site quality. Crown recession represented empirical limitation to crown development caused mechanical contacts with neighboring trees. The based on carbon budget (photosynthesis, respiration senescence) partitioning between foliage, root compartments. An internal regulation introduced...
Modelling plant structure and growth has undergone major changes in the last decades along two lines: integration of ecophysiological knowledge process-based models which often lack a description topology geometry, generation 3-D virtual plants using morphogenetic simulate architectural development stable homogeneous environment. There is now trend to merge these approaches, that link architecture functioning. This based on recognition structure: (i) joint output physiological processes...
Au cours des dernières décennies, la modélisation de croissance arbres et dynamique peuplements forestiers a connu un développement important suscité applications plus en nombreuses. Cet article vise à préciser illustrer ce que sont : 1) tant démarche scientifique technique 2) les modèles (de croissance) produits cette démarche. La est présentée comme processus où interviennent conjointement objectifs (ceux chercheurs ou gestionnaires), connaissances biologiques (à acquérir intégrer dans...
Rapport, elabore a la demande des ministres en charge de l'Education nationale, l'Enseignement superieur et Recherche.
In the past 30 years, notion of landscape has emerged in ecology as a result both theoretical considerations and practical aspects land use cover.This generated variety numerical models addressing methodological thematic objectives.Scientists model landscapes for at least two reasons: to better understand dynamics themselves (called intrinsic needs) offer realistic frame support other ecological processes (extrinsic needs).This paper mainly concerns needs; it reviews discusses way...