A5039923136- Plant Water Relations and Carbon Dynamics
- Plant responses to elevated CO2
- Climate variability and models
- Tree-ring climate responses
- Ecology and Vegetation Dynamics Studies
- Computability, Logic, AI Algorithms
- Forest ecology and management
- Photosynthetic Processes and Mechanisms
- Atmospheric chemistry and aerosols
- Constraint Satisfaction and Optimization
- Evolutionary Algorithms and Applications
- Atmospheric and Environmental Gas Dynamics
- Greenhouse Technology and Climate Control
- Vehicle emissions and performance
- Horticultural and Viticultural Research
- Leaf Properties and Growth Measurement
- Species Distribution and Climate Change
- Plant Ecology and Soil Science
- Numerical methods for differential equations
- Climate Change Policy and Economics
- Environmental and Agricultural Sciences
- Complex Systems and Time Series Analysis
- Water Quality and Pollution Assessment
Macquarie University
2012-2019
Western Sydney University
2012-2018
Ecologie et Ecophysiologie Forestières
2017
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2016
Abstract. Stomatal conductance (gs) affects the fluxes of carbon, energy and water between vegetated land surface atmosphere. We test an implementation optimal stomatal model within Community Atmosphere Biosphere Land Exchange (CABLE) (LSM). In common with many LSMs, CABLE does not differentiate gs parameters in relation to plant functional type (PFT), but instead only photosynthetic pathway. constrained key parameter "g1", which represents use strategy, by PFT, based on a global synthesis...
Summary The terrestrial carbon and water cycles are intimately linked: the cycle is driven by photosynthesis, while balance dominated transpiration, both fluxes controlled plant stomatal conductance. ratio between these fluxes, water‐use efficiency (WUE), a useful indicator of vegetation function. WUE can be estimated using several techniques, including leaf gas exchange, stable isotope discrimination, eddy covariance. Here we compare global compilations data for each three techniques. We...
The response of photosynthesis to temperature is a central facet plant climate. Such responses have been found be highly variable among species and studies. Understanding this variability key when trying predict the effects rising global temperatures on productivity. There are three major factors affecting leaf net (An–T): (i) photosynthetic biochemistry, (ii) respiration (iii) vapour pressure deficit (D) stomatal sensitivity during measurements. overall goal our study was quantify relative...
Simulations of photosynthesis by terrestrial biosphere models typically need a specification the maximum carboxylation rate (Vcmax ). Estimating this parameter using A-Ci curves (net photosynthesis, A, vs intercellular CO2 concentration, Ci ) is laborious, which limits availability Vcmax data. However, many multispecies field datasets include net photosynthetic at saturating irradiance and ambient atmospheric concentration (Asat measurements, from can be extracted 'one-point method'. We used...
Eucalyptus species are grown widely outside of their native ranges in plantations on all vegetated continents the world. We predicted that such a plantation would show high potential for acclimation photosynthetic traits across wide range growth conditions, including elevated [CO2] and climate warming. To test this prediction, we planted temperate globulus Labill. seedlings climate-controlled chambers field located >700 km closer to equator than nearest natural occurrence species. Trees were...
Models of stomatal conductance (g(s)) are based on coupling between g(s) and CO(2) assimilation (A(net)), it is often assumed that the slope this relationship ('g(1) ') constant across species. However, if different plant species have adapted to access costs water, then there will be differences in g(1) among We hypothesized should vary climates, tested theory its linkage hydraulics using four Eucalyptus from climatic origins a common garden. Optimal predicts sub-humid zones lower marginal...
Abstract. The capacity of the terrestrial biosphere to sequester carbon and mitigate climate change is governed by ability vegetation remove emissions CO2 through photosynthesis. Tropospheric O3, a globally abundant potent greenhouse gas, is, however, known damage plants, causing reductions in primary productivity. Despite emission control policies across Europe, background concentrations tropospheric O3 have risen significantly over last decades due hemispheric-scale increases its...
Abstract. We implement a new stomatal conductance scheme, based on the optimality approach, within Community Atmosphere Biosphere Land Exchange (CABLEv2.0.1) land surface model. Coupled land–atmosphere simulations are then performed using CABLEv2.0.1 Australian Climate and Earth Systems Simulator (ACCESSv1.3b) with prescribed sea temperatures. As in most models, default scheme only accounts for differences model parameters relation to photosynthetic pathway but not plant functional types....
Plants show flexible acclimation of leaf photosynthesis to temperature that depends both on their prevailing growth environment and the climate where they originated. This has been shown involve changes in responses apparent maximum rate Rubisco carboxylation (Vcmax) electron transport (Jmax), as well ratio these parameters. We asked whether such photosynthetic biochemistry attributable origin are similar nature magnitude those environment. To address this question, we measured chlorophyll...
Abstract. The capacity of the terrestrial biosphere to sequester carbon and mitigate climate change is governed by ability vegetation remove emissions CO2 through photosynthesis. Tropospheric O3, a globally abundant potent greenhouse gas, is, however, known damage plants, causing reductions in primary productivity, yet impact this gas on European land sink largely unknown. Despite emission control policies across Europe, background concentrations tropospheric O3 have risen significantly over...
Abstract. Stomatal conductance (gs) affects the fluxes of carbon, energy and water between vegetated land surface atmosphere. We test an implementation optimal stomatal model within Community Atmosphere Biosphere Land Exchange (CABLE) (LSM). In common with many LSMs, CABLE does not differentiate gs parameters in relation to plant functional type (PFT), but instead only photosynthetic pathway. therefore constrained key parameter "g1" which represents a plants use strategy by PFT based on...
New Zealand kauri (Agathis australis) (D.Don) Lindl. is a large and long-lived tree species endemic to the species-rich forests of north North Island. Agathis australis are culturally ecologically significant, but little known about their ecophysiology. In particular, environmental drivers fluxes carbon water for A. trees have not been quantified. We measured leaf gas exchange explore effect age, size, foliar nitrogen concentration, photosynthetically active radiation (PAR) vapour pressure...
Abstract. We implement a new stomatal conductance model, based on the optimality approach, within Community Atmosphere Biosphere Land Exchange (CABLE) land surface model. Coupled land-atmosphere simulations are then performed using CABLE Australian Climate and Earth Systems Simulator (ACCESS) with prescribed sea temperatures. As in most models, default scheme only accounts for differences model parameters relation to photosynthetic pathway, but not plant functional types. The allows vary by...