Climate, crops and lacking data underlie regional disparities in the CO
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                    fertilization effect

Rosenthal, David; Tomeo, Nicholas J

doi:10.1088/1748-9326/8/3/031001

Cited by 7 publications

(4 citation statements)

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“…The effect of e[CO 2 ] on different plant physiological processes, such as photosynthesis and stomatal conductance, is well researched (Leakey et al, ; Thilakarathne et al, ). It has been well established that elevated [CO 2 ] increases photosynthetic rates (Drake, Gonzàlez‐Meler, & Long, ; Ehleringer & Cerling, ; Rosenthal & Tomeo, ; Yamori, Hikosaka, & Way, ), while stomatal conductance decreases across a range of plant species (Ainsworth & Long, ; Ainsworth & Rogers, ; Farquhar & Sharkey, ; Medlyn et al, ). Correspondingly, a number of researchers have considered the concept of food security in regard to e[CO 2 ] (Ziska et al, ).…”

Section: Introductionmentioning

confidence: 99%

Assessment of grain quality in terms of functional group response to elevated [CO₂], water, and nitrogen using a meta‐analysis: Grain protein, zinc, and iron under future climate

Al-Hadeethi

Odhafa

et al. 2019

Ecology and Evolution

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The increasing [CO 2 ] in the atmosphere increases crop productivity. However, grain quality of cereals and pulses are substantially decreased and consequently compromise human health. Meta‐analysis techniques were employed to investigate the effect of elevated [CO 2 ] (e[CO 2 ]) on protein, zinc (Zn), and iron (Fe) concentrations of major food crops (542 experimental observations from 135 studies) including wheat, rice, soybean, field peas, and corn considering different levels of water and nitrogen (N). Each crop, except soybean, had decreased protein, Zn, and Fe concentrations when grown at e[CO 2 ] concentration (≥550 μmol/mol) compared to ambient [CO 2 ] (a[CO 2 ]) concentration (≤380 μmol/mol). Grain protein, Zn, and Fe concentrations were reduced under e[CO 2 ]; however, the responses of protein, Zn, and Fe concentrations to e[CO 2 ] were modified by water stress and N. There was an increase in Fe concentration in soybean under medium N and wet conditions but nonsignificant. The reductions in protein concentrations for wheat and rice were ~5%–10%, and the reductions in Zn and Fe concentrations were ~3%–12%. For soybean, there was a small and nonsignificant increase of 0.37% in its protein concentration under medium N and dry water, while Zn and Fe concentrations were reduced by ~2%–5%. The protein concentration of field peas decreased by 1.7%, and the reductions in Zn and Fe concentrations were ~4%–10%. The reductions in protein, Zn, and Fe concentrations of corn were ~5%–10%. Bias in the dataset was assessed using a regression test and rank correlation. The analysis indicated that there are medium levels of bias within published meta‐analysis studies of crops responses to free‐air [CO 2 ] enrichment (FACE). However, the integration of the influence of reporting bias did not affect the significance or the direction of the [CO 2 ] effects.

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Section: Introductionmentioning

confidence: 99%

Assessment of grain quality in terms of functional group response to elevated [CO₂], water, and nitrogen using a meta‐analysis: Grain protein, zinc, and iron under future climate

Al-Hadeethi

Odhafa

et al. 2019

Ecology and Evolution

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“…While global studies on crop yields might be relatively robust in regard to this variability, it might have a larger impact at regional scales. However, regional disparities in the context of climate and crops are not well understood and studies concerning this topic are relatively sparse today (Rosenthal and Tomeo, 2013).…”

Section: Introductionmentioning

confidence: 99%

Atmospheric CO2 fertilization effects on biomass yields of 10 crops in northern Germany

Degener

2015

Front. Environ. Sci.

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The quality and quantity of the influence that atmospheric CO 2 has on crop growth is still a matter of debate. This study's aim is to estimate if [CO 2 ] will have an effect on biomass yields at all, to quantify and spatially locate the effects and to explore if an elevated photosynthesis rate or water-use-efficiency is predominantly responsible. This study uses a numerical carbon-based crop model (BioSTAR) to estimate biomass yields within the administrative boundaries of Niedersachsen in Northern Germany. Ten crops are included (winter grains: wheat, barley, rye, triticale-early, medium, late maize variety-sunflower, sorghum, spring wheat), modeled annually for the entire twenty-first century on 91,014 separate sites. Modeling was conducted twice, once with an annually adapted [CO 2 ] concentration according to the SRES-A1B scenario and once with a fixed concentration of 390 ppm to separate the influence of [CO 2 ] from that of the other input variables. Rising [CO 2 ] concentrations will play a central role in keeping future yields of all crops above or around today's level. Differences in yields between modeling with fixed or adapted [CO 2 ] can be as high as 60% toward the century's end. Generally, yields will increase when [CO 2 ] rises and decline when it is kept constant. As C 4 -crops are equivalently affected it is presumed that an elevated efficiency in water use is the main responsible factor for all plants.

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“…Intercomparisons of diverse DGVM features have been performed several times (e.g. Cramer et al, 2001;Luo et al, 2008;Piao et al, 2013), but only recently have models of different types (DGVMs, global hydrological models and land surface models) been compared in a systematic fashion (Haddeland et al, 2011;Davies et al, 2013;Deryng et al, 2013; also see Rosenthal and Tomeo, 2013). Results from those studies suggest that confidence in simulations of future water availability and crop production is relatively low, not least because simulated plant responses to CO 2 rise diverge significantly among those models.…”

Section: Discussionmentioning

confidence: 99%

A vital link: water and vegetation in the Anthropocene

Gerten

2013

Hydrol. Earth Syst. Sci.

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Abstract. This paper argues that the interplay of water, carbon and vegetation dynamics fundamentally links some global trends in the current and conceivable future Anthropocene, such as cropland expansion, freshwater use, and climate change and its impacts. Based on a review of recent literature including geographically explicit simulation studies with the process-based LPJmL global biosphere model, it demonstrates that the connectivity of water and vegetation dynamics is vital for water security, food security and (terrestrial) ecosystem dynamics alike. The water limitation of net primary production of both natural and agricultural plantsalready pronounced in many regions -is shown to increase in many places under projected climate change, though this development is partially offset by water-saving direct CO 2 effects. Natural vegetation can to some degree adapt dynamically to higher water limitation, but agricultural crops usually require some form of active management to overcome it -among them irrigation, soil conservation and eventually shifts of cropland to areas that are less water-limited due to more favourable climatic conditions. While crucial to secure food production for a growing world population, such human interventions in water-vegetation systems have, as also shown, repercussions on the water cycle. Indeed, land use changes are shown to be the second-most important influence on the terrestrial water balance in recent times. Furthermore, climate change (warming and precipitation changes) will in many regions increase irrigation demand and decrease water availability, impeding rainfed and irrigated food production (if not CO 2 effects counterbalance this impact -which is unlikely at least in poorly managed systems). Drawing from these exemplary investigations, some research perspectives on how to further improve our knowledge of human-watervegetation interactions in the Anthropocene are outlined.

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Climate, crops and lacking data underlie regional disparities in the CO ₂ fertilization effect

Cited by 7 publications

References 6 publications

Assessment of grain quality in terms of functional group response to elevated [CO₂], water, and nitrogen using a meta‐analysis: Grain protein, zinc, and iron under future climate

Assessment of grain quality in terms of functional group response to elevated [CO₂], water, and nitrogen using a meta‐analysis: Grain protein, zinc, and iron under future climate

Atmospheric CO2 fertilization effects on biomass yields of 10 crops in northern Germany

A vital link: water and vegetation in the Anthropocene

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Climate, crops and lacking data underlie regional disparities in the CO 2 fertilization effect

Cited by 7 publications

References 6 publications

Assessment of grain quality in terms of functional group response to elevated [CO2], water, and nitrogen using a meta‐analysis: Grain protein, zinc, and iron under future climate

Assessment of grain quality in terms of functional group response to elevated [CO2], water, and nitrogen using a meta‐analysis: Grain protein, zinc, and iron under future climate

Atmospheric CO2 fertilization effects on biomass yields of 10 crops in northern Germany

A vital link: water and vegetation in the Anthropocene

Contact Info

Product

Resources

About

Climate, crops and lacking data underlie regional disparities in the CO ₂ fertilization effect

Assessment of grain quality in terms of functional group response to elevated [CO₂], water, and nitrogen using a meta‐analysis: Grain protein, zinc, and iron under future climate

Assessment of grain quality in terms of functional group response to elevated [CO₂], water, and nitrogen using a meta‐analysis: Grain protein, zinc, and iron under future climate