Journal ArticleDOI
Thermal plasticity of photosynthesis: the role of acclimation in forest responses to a warming climate
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TLDR
This article investigated photosynthetic sensitivity to temperature and the potential for acclimation in relation to the climatic provenance of five species of deciduous trees, Liquidambar styraciflua, quercus rubra, Quercus falcata, Betula alleghaniensis, and Populus grandidentata.Abstract:
The increasing air temperatures central to climate change predictions have the potential to alter forest ecosystem function and structure by exceeding temperatures optimal for carbon gain. Such changes are projected to threaten survival of sensitive species, leading to local extinctions, range migrations, and altered forest composition. This study investigated photosynthetic sensitivity to temperature and the potential for acclimation in relation to the climatic provenance of five species of deciduous trees, Liquidambar styraciflua, Quercus rubra, Quercus falcata, Betula alleghaniensis, and Populus grandidentata. Open-top chambers supplied three levels of warming (+0, +2, and +4 C above ambient) over 3 years, tracking natural temperature variability. Optimal temperature for CO2 assimilation was strongly correlated with daytime temperature in all treatments, but assimilation rates at those optima were comparable. Adjustment of thermal optima was confirmed in all species, whether temperatures varied with season or treatment, and regardless of climate in the species' range or provenance of the plant material. Temperature optima from 17 to 34 were observed. Across species, acclimation potentials varied from 0.55 C to 1.07 C per degree change in daytime temperature. Responses to the temperature manipulation were not different from the seasonal acclimation observed in mature indigenous trees, suggesting that photosynthetic responsesmore » should not be modeled using static temperature functions, but should incorporate an adjustment to account for acclimation. The high degree of homeostasis observed indicates that direct impacts of climatic warming on forest productivity, species survival, and range limits may be less than predicted by existing models.« lessread more
Citations
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Journal ArticleDOI
Plant carbon metabolism and climate change: elevated CO2 and temperature impacts on photosynthesis, photorespiration and respiration.
TL;DR: This work reviews how photosynthesis, photorespiration and respiration are affected by increasing atmospheric CO2 concentrations and climate warming, both separately and in combination and highlights the need to study these physiological processes together to better predict how vegetation carbon metabolism will respond to climate change.
Journal ArticleDOI
Plant respiration and photosynthesis in global‐scale models: incorporating acclimation to temperature and CO2
TL;DR: The latest empirical evidence that short-term responses of plant carbon exchange rates to temperature and CO2 are modified by plant photosynthetic and respiratory acclimation as well as biogeochemical feedbacks is reviewed.
Journal ArticleDOI
A meta-analysis of responses of soil biota to global change
TL;DR: It is found that the positive effect size of elevated CO2 on the abundance of soil biota diminished with time, whereas the negative effect sizes of warming and positive effectsize of precipitation intensified with time.
Journal ArticleDOI
A roadmap for improving the representation of photosynthesis in Earth system models
Alistair Rogers,Belinda E. Medlyn,Jeffrey S. Dukes,Gordon B. Bonan,Susanne von Caemmerer,Michael Dietze,Jens Kattge,Andrew D. B. Leakey,Lina M. Mercado,Ülo Niinemets,I. Colin Prentice,I. Colin Prentice,Shawn P. Serbin,Stephen Sitch,Danielle A. Way,Danielle A. Way,Sönke Zaehle +16 more
TL;DR: This work compared the representation of photosynthesis in seven TBMs by examining leaf and canopy level responses of photosynthetic CO2 assimilation to key environmental variables: light, temperature, CO2 concentration, vapor pressure deficit and soil water content.
Journal ArticleDOI
Evidence of current impact of climate change on life: a walk from genes to the biosphere
Josep Peñuelas,Jordi Sardans,Marc Estiarte,Romà Ogaya,Jofre Carnicer,Jofre Carnicer,Marta Coll,Adrià Barbeta,Albert Rivas-Ubach,Joan Llusià,Martín F. Garbulsky,Martín F. Garbulsky,Iolanda Filella,Alistair S. Jump,Alistair S. Jump +14 more
TL;DR: The evidence of how organisms and populations are currently responding to climate change through phenotypic plasticity, genotypic evolution, changes in distribution and, in some cases, local extinction is reviewed.
References
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Journal ArticleDOI
A Biochemical Model of Photosynthetic CO 2 Assimilation in Leaves of C 3 Species
TL;DR: Various aspects of the biochemistry of photosynthetic carbon assimilation in C3 plants are integrated into a form compatible with studies of gas exchange in leaves.
Journal ArticleDOI
Extinction risk from climate change
Chris D. Thomas,Alison Cameron,Rhys E. Green,Rhys E. Green,Michel Bakkenes,Linda J. Beaumont,Yvonne C. Collingham,Barend F.N. Erasmus,Marinez Ferreira de Siqueira,Alan Grainger,Lee Hannah,Lesley Hughes,Brian Huntley,Albert S. van Jaarsveld,Guy F. Midgley,Lera Miles,Lera Miles,Miguel A. Ortega-Huerta,A. Townsend Peterson,Oliver L. Phillips,Stephen E. Williams +20 more
TL;DR: Estimates of extinction risks for sample regions that cover some 20% of the Earth's terrestrial surface show the importance of rapid implementation of technologies to decrease greenhouse gas emissions and strategies for carbon sequestration.
Journal ArticleDOI
Climate change 2007: the physical science basis
TL;DR: In this article, Chen et al. present a survey of the state of the art in the field of computer vision and artificial intelligence, including a discussion of the role of the human brain in computer vision.
Journal ArticleDOI
Photosynthetic Response and Adaptation to Temperature in Higher Plants
Joseph A. Berry,Olle Björkman +1 more
TL;DR: A comparison of plants from contrasting thermol regimes in Thermally Contrasting Climates and adoptive responses in the heat stability 0/ the photosynthetic apparatus highlights the need to understand more fully the role of photosynthesis in climate change.
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