Modeling the response of plants and ecosystems to elevated CO{sub 2} and climate change

Reynolds, John F.; Hilbert, David W.; Chen, Jialin; Harley, P. C.; Kemp, Paul R.; Leadley, Paul

doi:10.2172/10130466

Cited by 6 publications

(3 citation statements)

References 6 publications

(7 reference statements)

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“…The stomatal conductance varies with a range of environmental conditions, including CO2 concentration [Jones, 1992]. Therefore as the photosynthetic rate A varies, so does stomatal conductance, and vice versa [Harley et al, 1992].…”

Section: Carbon Dioxide Supplymentioning

confidence: 99%

A global land primary productivity and phytogeography model

Woodward¹,

Smith²,

Emanuel³

1995

Global Biogeochemical Cycles

489

375

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A global primary productivity and phytogeography model is described. The model represents the biochemical processes of photosynthesis and the dependence of gas exchange on stomatal conductance, which in turn depends on temperature and soil moisture. Canopy conductance controls soil water loss by evapotranspiration. The assignment of nitrogen uptake to leaf layers is proportional to irradiance, and respiration and maximum assimilation rates depend on nitrogen uptake and temperature. Total nitrogen uptake is derived from soil carbon and nitrogen and depends on temperature. The long‐term average annual carbon and hydrological budgets dictate canopy leaf area. Although observations constrain soil carbon and nitrogen, the distribution of vegetation types is not specified by an underlying map. Variables simulated by the model are compared to experimental results. These comparisons extend from biochemical processes to the whole canopy, and the comparisons are favorable for both current and elevated CO2 atmospheres. The model is used to simulate the global distributions of leaf area index and annual net primary productivity. These distributions are sufficiently realistic to demonstrate that the model is useful for analyzing vegetation responses to global environmental change.

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Section: Carbon Dioxide Supplymentioning

confidence: 99%

A global land primary productivity and phytogeography model

Woodward¹,

Smith²,

Emanuel³

1995

Global Biogeochemical Cycles

489

375

View full text Add to dashboard Cite

show abstract

“…Several canopy models have used a biochemical model of photosynthesis, generally based on the model of CO 2 assimilation first published by Farquhar et al (1980), although in many cases it has been empirically fitted to leaf CO a exchange measurements. Reports by Duncan et al (1967), Sinclair et al (1976), Galoux et al (1981), Caldwell et al (1986), Tenhunen et al (1990), Wang and Jarvis (1990), Reynolds et al (1992), Wang et al (1992), Baldocchi (1993), McMurtrie and Wang (1993), and Norman (1993) can be consulted for an overview of specific models and some literature reviews.…”

Section: Predicting Short-term Photosynthesis In Leaves and Canopiesmentioning

confidence: 99%

Scaling CO2-photosynthesis relationships from the leaf to the canopy

1994

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Responses of individual leaves to short-term changes in CO2 partial pressure have been relatively well studied. Whole-plant and plant community responses to elevated CO2 are less well understood and scaling up from leaves to canopies will be complicated if feedbacks at the small scale differ from feedbacks at the large scale. Mathematical models of leaf, canopy, and ecosystem processes are important tools in the study of effects on plants and ecosystems of global environmental change, and in particular increasing atmospheric CO2, and might be used to scale from leaves to canopies. Models are also important in assessing effects of the biosphere on the atmosphere. Presently, multilayer and big leaf models of canopy photosynthesis and energy exchange exist. Big leaf models - which are advocated here as being applicable to the evaluation of impacts of 'global change' on the biosphere - simplify much of the underlying leaf-level physics, physiology, and biochemistry, yet can retain the important features of plant-environment interactions with respect to leaf CO2 exchange processes and are able to make useful, quantitative predictions of canopy and community responses to environmental change. The basis of some big leaf models of photosynthesis, including a new model described herein, is that photosynthetic capacity and activity are scaled vertically within a canopy (by plants themselves) to match approximately the vertical profile of PPFD. The new big leaf model combines physically based models of leaf and canopy level transport processes with a biochemically based model of CO2 assimilation. Predictions made by the model are consistent with canopy CO2 exchange measurements, although a need exists for further testing of this and other canopy physiology models with independent measurements of canopy mass and energy exchange at the time scale of 1 h or less.

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“…Simulation models depicting the carbon balance of leaves, plant canopies, and ecosystems, increasingly use biochemical descriptions of CO 2 assimilation (Friend, 1991;Reynolds et al, 1992). Although several dynamic and steady-state models of CO 2 assimilation are currently available, the mechanistic model proposed by Farquhar et al (1980), later modified by Sharkey (1985) and by Harley and Sharkey (1991), has gained favour in plant science.…”

mentioning

confidence: 99%

Differential heat-induced changes in the CO₂assimilation rate and electron transport in tomato (Lycopersicon esculentumMill.)

Camejo

Nicolás

Torres

et al. 2010

The Journal of Horticultural Science and Biotechnology

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Modeling the response of plants and ecosystems to elevated CO{sub 2} and climate change

Cited by 6 publications

References 6 publications

A global land primary productivity and phytogeography model

A global land primary productivity and phytogeography model

Scaling CO2-photosynthesis relationships from the leaf to the canopy

Differential heat-induced changes in the CO₂assimilation rate and electron transport in tomato (Lycopersicon esculentumMill.)

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Modeling the response of plants and ecosystems to elevated CO{sub 2} and climate change

Cited by 6 publications

References 6 publications

A global land primary productivity and phytogeography model

A global land primary productivity and phytogeography model

Scaling CO2-photosynthesis relationships from the leaf to the canopy

Differential heat-induced changes in the CO2assimilation rate and electron transport in tomato (Lycopersicon esculentumMill.)

Contact Info

Product

Resources

About

Differential heat-induced changes in the CO₂assimilation rate and electron transport in tomato (Lycopersicon esculentumMill.)