A5039253664- Plant Water Relations and Carbon Dynamics
- Plant responses to elevated CO2
- Atmospheric chemistry and aerosols
- Wheat and Barley Genetics and Pathology
- Species Distribution and Climate Change
- Photosynthetic Processes and Mechanisms
- Remote Sensing in Agriculture
- Isotope Analysis in Ecology
- Forest Management and Policy
- Forest ecology and management
- Atmospheric and Environmental Gas Dynamics
- Plant Stress Responses and Tolerance
- Ecology and Vegetation Dynamics Studies
- Crop Yield and Soil Fertility
- Bioenergy crop production and management
- Genetics and Plant Breeding
- Peatlands and Wetlands Ecology
- Soil Carbon and Nitrogen Dynamics
- Climate variability and models
- Plant nutrient uptake and metabolism
- Horticultural and Viticultural Research
- Tree-ring climate responses
- Geology and Paleoclimatology Research
- Remote Sensing and LiDAR Applications
- Silicon Effects in Agriculture
Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria
2019-2024
Cereal Research Centre
2017-2024
Centro di Ricerca per l’Orticoltura
2019-2023
Potsdam Institute for Climate Impact Research
2005-2014
Université Paris-Saclay
1997-2003
Université Paris Cité
1997-1999
Université Paris-Sud
1997-1998
Centre National de la Recherche Scientifique
1997-1998
Goethe University Frankfurt
1988-1997
Summary Climate change effects on seasonal activity in terrestrial ecosystems are significant and well documented, especially the middle higher latitudes. Temperature is a main driver of many plant developmental processes, cases temperatures have been shown to speed up development lead earlier switching next ontogenetic stage. Qualitatively consistent advancement vegetation spring has documented using three independent methods, based ground observations, remote sensing, analysis atmospheric...
ABSTRACT The effects of elevated atmospheric CO 2 concentration on growth forest tree species are difficult to predict because practical limitations restrict experiments much shorter than the average life‐span a tree. Long‐term, process‐based computer models must be used extrapolate from shorter‐term experiments. A key problem is ensure strong flow information between and models. In this study, meta‐analysis techniques were summarize suite photosynthetic model parameters obtained 15...
Discrimination against 13C during photosynthesis is a well-characterised phenomenon. It leaves behind distinct signatures in organic matter of plants and the atmosphere. The former depleted 13C, latter enriched periods preponderant photosynthetic activity terrestrial ecosystems. intra-annual cycle latitudinal gradient atmospheric resulting from respiratory activities have been exploited for reconstruction sources sinks through deconvolution by inverse modelling. Here, we compile evidence...
Abstract The carbon isotope composition (δ13C) of CO2 produced in darkness by intact French bean (Phaseolus vulgaris) leaves was investigated for different leaf temperatures and during dark periods increasing length. δ13C linearly decreased when temperature increased, from −19‰ at 10°C to −24‰ 35°C. It also progressively −21‰ −30‰ were maintained continuous several days. Under normal conditions (temperature not exceeding 30°C period), the evolved enriched 13C compared with carbohydrates,...
We present a detailed investigation of the gross 12 C and 13 exchanges between atmosphere biosphere their influence on δ variations in atmosphere. The photosynthetic discrimination Δ against is derived from biophysical model coupled to general circulation [ Sellers et al. , 1996a], where stomatal conductance carbon assimilation are determined simultaneously with ambient climate. respired calculated by biogeochemical Potter 1993; Randerson 1996] as sum contributions compartments varying ages....
ABSTRACT The variations of δ 13 C in leaf metabolites (lipids, organic acids, starch and soluble sugars), matter CO 2 respired the dark from leaves Nicotiana sylvestris Helianthus annuus were investigated during a progressive drought. Under well‐watered conditions, was C‐enriched compared to sucrose by about 4‰ N. 3‰ 6‰ two different sets experiments H. plants. In previous work on cotyledonary Phaseolus vulgaris , we observed constant C‐enrichment sucrose, suggesting fractionation...
Future climate changes are expected to increase risks of drought, which already represent the most common stress factor for stable barley (Hordeum vulgare L.) production in Mediterranean areas. It is important, therefore, evaluate if there needs specific adaptive measures selecting genotypes these more stressful environments. Our objective was study diversity yield performance under rainfed (R) and irrigated (I) conditions 89 different origin, growth habit, year release, representing a...
We present niche-based modelling to project the distribution of 845 European plant species for Germany using three different models and scenarios climate land use changes up 2080. Projected suggested large effects over coming decades, with consequences German flora. Even under a moderate scenario (approx. +2.2°C), 15–19% (across models) we studied could be lost locally—averaged from 2995 grid cells in Germany. Models projected strong spatially varying impacts on composition. In particular,...
Abstract. Stable isotope analysis is a powerful tool for assessing plant carbon and water relations their impact on biogeochemical processes at different scales. Our process-based understanding of stable signals, as well technological developments, has progressed significantly, opening new frontiers in ecological interdisciplinary research. This promoted the broad utilisation carbon, oxygen hydrogen applications to gain insight into cycling interaction with atmosphere pedosphere. Here, we...
A , leaf net CO 2 assimilation a fractionation against 13 C for diffusion through air b during fixation by Rubisco and PEPc δ C, carbon isotopic composition Δ discrimination d the term including due to dissolution, liquid phase also both respiration photorespiration DW, dry weight difference between respired in dark plant material their isotope variation modelled at given p i / relative reference value = 0·7 FW, fresh g c conductance HPLC, high‐performance chromatography LMA, mass per area...
The origin of the non-statistical intramolecular distribution 13C in glucose C3 plants is examined, including role aldolisation triose phosphates as proposed by Gleixner and Schmidt (1997). A modelling approach taken order to investigate relationships between hexoses reactions primary carbon metabolism. model takes into account C-C bond-breaking Calvin cycle leads a mathematical expression for isotope ratios steady state. In best fit experimentally-observed distribution, values given...
A global prognostic physiologically based model of the carbon budget in terrestrial ecosystems, Frankfurt Biosphere Model (FBM), is applied to simulate interannual variation exchange fluxes between atmosphere and biosphere. The data on climatic forcing are Cramer Leemans climate maps; introduced according records temperature anomalies precipitation for period 1980 1993. calculated net flux biosphere compared biospheric signal deduced from 13 C measurements. Some intermediate results...