What have we learned from 15 years of free-air CO2 enrichment (FACE)? A meta-analytic review of the responses of photosynthesis, canopy properties and plant production to rising CO2.
TLDR
The results from this review may provide the most plausible estimates of how plants in their native environments and field-grown crops will respond to rising atmospheric [CO(2)]; but even with FACE there are limitations, which are discussed.Abstract:
Contents
Summary 1
I. What is FACE? 2
II. Materials and methods 2
III. Photosynthetic carbon uptake 3
IV. Acclimation of photosynthesis 6
V. Growth, above-ground production and yield 8
VI. So, what have we learned? 10
Acknowledgements 11
References 11
Appendix 1. References included in the database for meta-analyses 14
Appendix 2. Results of the meta-analysis of FACE effects 18
Summary
Free-air CO2 enrichment (FACE) experiments allow study of the effects of elevated [CO2] on plants and ecosystems grown under natural conditions without enclosure. Data from 120 primary, peer-reviewed articles describing physiology and production in the 12 large-scale FACE experiments (475–600 ppm) were collected and summarized using meta-analytic techniques. The results confirm some results from previous chamber experiments: light-saturated carbon uptake, diurnal C assimilation, growth and above-ground production increased, while specific leaf area and stomatal conductance decreased in elevated [CO2]. There were differences in FACE. Trees were more responsive than herbaceous species to elevated [CO2]. Grain crop yields increased far less than anticipated from prior enclosure studies. The broad direction of change in photosynthesis and production in elevated [CO2] may be similar in FACE and enclosure studies, but there are major quantitative differences: trees were more responsive than other functional types; C4 species showed little response; and the reduction in plant nitrogen was small and largely accounted for by decreased Rubisco. The results from this review may provide the most plausible estimates of how plants in their native environments and field-grown crops will respond to rising atmospheric [CO2]; but even with FACE there are limitations, which are also discussed.read more
Citations
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The impacts of climate change in coastal marine systems.
Christopher D. G. Harley,A. Randall Hughes,Kristin M. Hultgren,Benjamin G. Miner,Cascade J. B. Sorte,Carol S. Thornber,Carol S. Thornber,Laura F. Rodriguez,Lars Tomanek,Lars Tomanek,Susan L. Williams +10 more
TL;DR: The relationship between temperature and individual performance is reasonably well understood, and much climate-related research has focused on potential shifts in distribution and abundance driven directly by temperature as discussed by the authors, however, recent work has revealed that both abiotic changes and biological responses in the ocean will be substantially more complex.
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Control of yellow and purple nutsedge in elevated CO2 environments with glyphosate and halosulfuron.
TL;DR: It is likely that predicted future CO2 levels will have little impact on the efficacy of single applications of halosulfuron or glyphosate for control of purple and yellow nutsedge at the growth stages described here, although scenarios demanding more persistent control efforts remain a question.
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The response of photosynthesis and stomatal conductance to rising [CO2]: mechanisms and environmental interactions.
TL;DR: Improved understanding of the molecular and biochemical mechanisms by which plants respond to elevated [CO2], and the feedback of environmental factors upon them, will improve the ability to predict ecosystem responses to rising [ CO2] and increase the potential to adapt crops and managed ecosystems to future atmospheric [CO 2].
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Climate change impacts, adaptive capacity, and vulnerability of European forest ecosystems
Marcus Lindner,Michael Maroschek,Sigrid Netherer,Antoine Kremer,Anna Barbati,Jordi Garcia-Gonzalo,Rupert Seidl,Sylvain Delzon,Piermaria Corona,Marja Kolström,Manfred J. Lexer,Marco Marchetti +11 more
TL;DR: In this paper, the most important potential impacts of climate change on forest goods and services are summarized for the Boreal, Temperate Oceanic, TOC, Mediterranean, and mountainous regions.
SYNTHESES The impacts of climate change in coastal marine systems
Christopher D. G. Harley,A. Randall Hughes,Benjamin G. Miner,Cascade J. B. Sorte,Laura F. Rodriguez,Lars Tomanek +5 more
TL;DR: Key directions for future research include identifying key demographic transitions that influence population dynamics, predicting changes in the community-level impacts of ecologically dominant species, incorporating populations' ability to evolve (adapt), and understanding the scales over which climate will change and living systems will respond.
References
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Climate change 2001: the scientific basis
John Theodore Houghton,Y. Ding,David John Griggs,M. Noguer,P. J. van der Linden,X. Dai,K. Maskell,C. A. Johnson +7 more
TL;DR: In this article, the authors present an overview of the climate system and its dynamics, including observed climate variability and change, the carbon cycle, atmospheric chemistry and greenhouse gases, and their direct and indirect effects.
Book
Statistical Methods for Meta-Analysis
Larry V. Hedges,Ingram Olkin +1 more
TL;DR: In this article, the authors present a model for estimating the effect size from a series of experiments using a fixed effect model and a general linear model, and combine these two models to estimate the effect magnitude.
Journal ArticleDOI
The meta-analysis of response ratios in experimental ecology
TL;DR: The approximate sampling distribution of the log response ratio is given, why it is a particularly useful metric for many applications in ecology, and how to use it in meta-analysis are discussed.
Book ChapterDOI
The Scientific Basis
TL;DR: In this paper, the topology of the tetrahedral linkage and the efficiency of space filling are compared for the various polymorphs of SiO2, and the displacive transformations from a more open high-temperature form (e.g., "high" or "h") to a denser form stable at lower temperatures (α quartz or cristobalite) are discussed.
Journal ArticleDOI
More Efficient Plants : a consequence of rising atmospheric CO2
TL;DR: The primary effect of plants response of plants to rising atmospheric CO2 (Ca) is to increase resource use efficiency, and at the same time it stimulates higher rates of photosynthesis and increases light-use efficiency as discussed by the authors.