Growth and photosynthetic responses in Brassica napus differ during stress and recovery periods when exposed to combined heat, drought and elevated CO2

Dikšaitytė, Austra; Viršilė, Akvilė; Žaltauskaitė, Jūratė; Januškaitienė, Irena; Juozapaitienė, Gintarė

doi:10.1016/j.plaphy.2019.06.026

Cited by 41 publications

(25 citation statements)

References 72 publications

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“…For California and Nevada, the same holds true with increasing ET 0 for both CO2-adjusted (based on Yang et al, 2019) and unadjusted estimates ( Figure S12). Although we acknowledge this concern, experiments on actual vegetative responses to elevated CO2 find minimal or no drought reducing effects on 10.1029/2020EF001736 various types of vegetation and ecosystems (e.g., Bachofen et al, 2018;Birami et al, 2020;Dikšaitytė et al, 2019;Duan et al, 2014;Jiang et al, 2020;Nackley et al, 2018). Furthermore, the 2012-2016 extreme hot drought in California and Nevada, intensified by CO2 driven warming (e.g., Shukla et al, 2015;Williams et al, 2015), resulted in major declines in vegetative health for parts of California (Dong et al, 2019) further calling into question whether future CO2 increases will mitigate drying, drought, and fire danger.…”

Section: 1029/2020ef001736mentioning

confidence: 92%

Projected Changes in Reference Evapotranspiration in California and Nevada: Implications for Drought and Wildland Fire Danger

et al. 2020

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Recent high impact wildfires and droughts in California and Nevada have been linked to extremes in the Evaporative Demand Drought Index (EDDI) and Standardized Precipitation Evapotranspiration Index (SPEI), respectively. Both indices are dependent on reference evapotranspiration (ET 0). Future changes in ET 0 for California and Nevada are examined, calculated from global climate model simulations downscaled by Localized Constructed Analogs (LOCA). ET 0 increases of 13-18% at seasonal timescales are projected by late century (2070-2099), with greatest relative increases in winter and spring. Seasonal ET 0 increases are most strongly driven by warmer temperatures, with increasing specific humidity having a smaller, but noteworthy, counter tendency. Extreme (95th percentile) EDDI values on the 2-week timescale have coincided with recent large wildfires in the area. Two-week EDDI extremes are projected to increase by 6-10 times during summer and 4-6 times during autumn by the end of the century. On multiyear timescales, the occurrence of extreme droughts based on 3-year SPEI below the historical fifth percentile, similar to that experienced during the 2012-2016 drought across the region, is projected to increase 3-15 times by late century. Positive trends in extreme multiyear droughts will further increase seasonal fire potential through degraded forests and increased fuel loads and flammability. Understanding how these drought metrics change on various climate timescales at the local level can provide fundamental information to support the development of long-term adaptation strategies for wildland fire and water resource management. Plain Language Summary Since the start of the 21st century, California and Nevada have observed extreme wildland fires and droughts that have caused devastating impacts to ecosystems and society. A common feature of these events has been very high atmospheric evaporative demand-the "thirst" of the atmosphere-which has largely been driven by increased air temperatures caused by anthropogenic climate change. This study examines projected changes in evaporative demand, which of the input variables are causing those changes and how the frequency of extreme wildfire potential and multiyear droughts will change. Evaporative demand is found to increase during all seasons, and increased temperatures drive most of that change. The likelihood of extreme wildfire potential based on 2-week periods of elevated evaporative demand during summer and autumn increases substantially. A climatic water balance based on precipitation and evaporative demand indicates extreme 3-year droughts that hold potential to deplete regional-scale water supply also become much more likely. Future adaptation planning efforts for wildfire management agencies, forest management, and water resource managers should account for a greater likelihood of more extreme events.

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Section: 1029/2020ef001736mentioning

confidence: 92%

Projected Changes in Reference Evapotranspiration in California and Nevada: Implications for Drought and Wildland Fire Danger

et al. 2020

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“…Therefore, focusing on environmental/agricultural drought conditions in future scenarios, the role of CO 2 effects on AED could be strongly different than for average conditions (or even than for mild drought conditions) (Morgan et al, 2004;Xu, Jiang, Jia, & Zhou, 2016). Different experiments based on enriched CO 2 conditions have showed that elevated CO 2 does not reduce nor delay tree mortality under drought (Bachofen, Moser, Hoch, Ghazoul, & Wohlgemuth, 2018;Duan et al, 2014Duan et al, , 2015, and that the same pattern occurs in pastures and shrubs (Nackley et al, 2018) and in crops (Dikšaitytė, Viršilė, Žaltauskaitė, Januškaitienė, & Juozapaitienė, 2019).…”

Section: Co 2 -Driven Radiative Forcing Versus Co 2 Physiological Effects On Stomatal Regulation: Implications For Future Drought Projectmentioning

confidence: 99%

Unraveling the influence of atmospheric evaporative demand on drought and its response to climate change

Vicente‐Serrano

McVicar

Miralles

et al. 2019

WIREs Climate Change

158

163

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This review examines the role of the atmospheric evaporative demand (AED) in drought. AED is a complex concept and here we discuss possible AED definitions, the subsequent metrics to measure and estimate AED, and the different physical drivers that control it. The complex influence of AED on meteorological, environmental/agricultural and hydrological droughts is discussed, stressing the important spatial differences related to the climatological conditions. Likewise, AED influence on drought has implications regarding how different drought metrics consider AED in their attempts to quantify drought severity. Throughout the article, we assess literature findings with respect to: (a) recent drought trends and future projections; (b) the several uncertainties related to data availability; (c) the sensitivity of current drought metrics to AED; and (d) possible roles that both the radiative and physiological effects of increasing atmospheric CO 2 concentrations may play as we progress into the future.All these issues preclude identifying a simple effect of the AED on drought severity.Rather it calls for different evaluations of drought impacts and trends under future climate scenarios, considering the complex feedbacks governing the climate system. This article is categorized under: Paleoclimates and Current Trends > Earth System Behavior K E Y W O R D S atmospheric evaporative demand,

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“…because warming can cause or intensify water stress, studies have shown that warming has more positive effects on photosynthesis when soil moisture is less limiting and more negative effects at low soil moisture (Arend, Brem, Kuster, & Günthardt-Goerg, 2013;Dikšaitytė, Viršilė, Žaltauskaitė, Januškaitienė, & Juozapaitienė, 2019;Reich et al, 2018). However, other studies have failed to find interactive effects of warming and precipitation on rates of photosynthesis (Rodgers, Hoeppner, Daley, & Dukes, 2012;B.…”

Section: The Influence Of Reduced Rainfall and Eco2 On Responses To Elevated Temperaturementioning

confidence: 99%

Interactive effects of elevated CO₂, warming, reduced rainfall, and nitrogen on leaf gas exchange in five perennial grassland species

Pastore

Lee

Hobbie

2020

Plant Cell & Environment

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Growth and photosynthetic responses in Brassica napus differ during stress and recovery periods when exposed to combined heat, drought and elevated CO2

Cited by 41 publications

References 72 publications

Projected Changes in Reference Evapotranspiration in California and Nevada: Implications for Drought and Wildland Fire Danger

Projected Changes in Reference Evapotranspiration in California and Nevada: Implications for Drought and Wildland Fire Danger

Unraveling the influence of atmospheric evaporative demand on drought and its response to climate change

Interactive effects of elevated CO₂, warming, reduced rainfall, and nitrogen on leaf gas exchange in five perennial grassland species

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Growth and photosynthetic responses in Brassica napus differ during stress and recovery periods when exposed to combined heat, drought and elevated CO2

Cited by 41 publications

References 72 publications

Projected Changes in Reference Evapotranspiration in California and Nevada: Implications for Drought and Wildland Fire Danger

Projected Changes in Reference Evapotranspiration in California and Nevada: Implications for Drought and Wildland Fire Danger

Unraveling the influence of atmospheric evaporative demand on drought and its response to climate change

Interactive effects of elevated CO2, warming, reduced rainfall, and nitrogen on leaf gas exchange in five perennial grassland species

Contact Info

Product

Resources

About

Interactive effects of elevated CO₂, warming, reduced rainfall, and nitrogen on leaf gas exchange in five perennial grassland species