Response of switchgrass yield to future climate change

A climate envelope approach was used to model the response of switchgrass, a model bioenergy species in the United States, to future climate change. The model was built using general additive models (GAMs), and switchgrass yields collected at 45 field trial locations as the response variable. The model incorporated variables previously shown to be the main determinants of switchgrass yield, and utilized current and predicted 1 km climate data from WorldClim. The models were run with current WorldClim data and compared with results of predicted yield obtained using two climate change scenarios across three global change models for three time steps. Results did not predict an increase in maximum switchgrass yield but showed an overall shift in areas of high switchgrass productivity for both cytotypes. For upland cytotypes, the shift in high yields was concentrated in northern and north-eastern areas where there were increases in average growing season temperature, whereas for lowland cultivars the areas where yields were projected to increase were associated with increases in average early growing season precipitation. These results highlight the fact that the influences of climate change on switchgrass yield are spatially heterogeneous and vary depending on cytotype. Knowledge of spatial distribution of suitable areas for switchgrass production under climate change should be incorporated into planning of current and future biofuel production. Understanding how switchgrass yields will be affected by future changes in climate is important for achieving a sustainable biofuels economy

Atmospheric sciences · Bioenergy · Biofuel · Biology · Climate change · Climate model · Climatology · Variable (mathematics · Yield (engineering · Bioenergy crop production and management · Biofuel production and bioconversion · Environmental Science · Forest Management and Policy · Mathematics · Ecology

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  Open Access•Qianlai Zhuang, Zhangcai Qin et al.•Environmental Research Letters•2013

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  Open Access•Miae Ha, May Wu•Environmental Research Letters•2017

  Incluir item

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  Open Access•Sundar Niroula, Ximing Cai et al.•Environmental Research Letters•2023

  Incluir item

• Very high resolution interpolated climate surfaces for global land areas

  Open Access•Robert J Hijmans, Susan E Cameron et al.•International Journal of…•2005

  Incluir item

• Use of U.S. Croplands for Biofuels Increases Greenhouse Gases Through Emissions from Land-Use Change

  Open Access•Timothy D Searchinger, Timothy Searchinger et al.•Science•2008

  Incluir item

• Novel climates, no-analog communities, and ecological surprises

  Open Access•John W Williams, Stephen T Jackson•Frontiers in Ecology and the…•2007

  Incluir item

• Extinction risk from climate change

  Open Access•Chris D Thomas, Alison Cameron et al.•Nature•2004

  Incluir item