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Research Article

Diversity buffers winegrowing regions from climate change losses

View ORCID ProfileIgnacio Morales-Castilla, View ORCID ProfileIñaki García de Cortázar-Atauri, Benjamin I. Cook, View ORCID ProfileThierry Lacombe, View ORCID ProfileAmber Parker, View ORCID ProfileCornelis van Leeuwen, View ORCID ProfileKimberly A. Nicholas, and Elizabeth M. Wolkovich
PNAS first published January 27, 2020 https://doi.org/10.1073/pnas.1906731117
Ignacio Morales-Castilla
aGlobal Change Ecology and Evolution (GloCEE) Group, Department of Life Sciences, University of Alcalá, Alcalá de Henares 28805, Spain;bThe Arnold Arboretum, Harvard University, Boston, MA 02131;cDepartment of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138;
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  • ORCID record for Ignacio Morales-Castilla
  • For correspondence: ignacio.moralesc@uah.es
Iñaki García de Cortázar-Atauri
dUnité de Service 1116 AgroClim, Institut National de la Recherche Agronomique, F-84914 Avignon, France;
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Benjamin I. Cook
eNASA Goddard Institute for Space Studies, New York, NY 10025;fDivision of Ocean and Climate Physics, Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964;
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Thierry Lacombe
gAmélioration Génétique et Adaptation des Plantes (AGAP), Institut National de la Recherche Agronomique (INRA), Montpellier SupAgro, Université Montpellier, F-34060 Montpellier, France;
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Amber Parker
hDepartment of Wine, Food, and Molecular Biosciences, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, Christchurch, New Zealand;
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Cornelis van Leeuwen
iEcophysiologie et Génomique Fonctionnelle de la Vigne (EGFV), Bordeaux Sciences Agro, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Bordeaux, Institut des Sciences de la Vigne et du Vin (ISVV), 33882 Villenave d’Ornon, France;
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  • ORCID record for Cornelis van Leeuwen
Kimberly A. Nicholas
jLund University Centre for Sustainability Studies, Lund University, SE-221 00, Lund, Sweden;
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Elizabeth M. Wolkovich
bThe Arnold Arboretum, Harvard University, Boston, MA 02131;cDepartment of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138;kForest and Conservation Sciences, Faculty of Forestry, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
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  1. Edited by Nils Chr. Stenseth, University of Oslo, Oslo, Norway, and approved December 17, 2019 (received for review April 19, 2019)

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Significance

Increasing diversity within crops may be a powerful way to reduce agricultural declines from climate change. As such, it has garnered increasing attention, especially in documenting within-crop diversity through different cultivars or wild relatives. Yet, there are few tests of whether this diversity can mitigate losses with warming. Here, using European (predominantly French) databases to forecast winegrape phenology, we test if shifting cultivars changes predictions of future growing regions. We find that cultivar diversity halved potential losses of winegrowing regions under a 2 °C warming scenario and could reduce losses by a third if warming reaches 4 °C. Thus, diversity—if adopted by growers locally—can mitigate agricultural losses, but its effectiveness will depend on global decisions regarding future emissions.

Abstract

Agrobiodiversity—the variation within agricultural plants, animals, and practices—is often suggested as a way to mitigate the negative impacts of climate change on crops [S. A. Wood et al., Trends Ecol. Evol. 30, 531–539 (2015)]. Recently, increasing research and attention has focused on exploiting the intraspecific genetic variation within a crop [Hajjar et al., Agric. Ecosyst. Environ. 123, 261–270 (2008)], despite few relevant tests of how this diversity modifies agricultural forecasts. Here, we quantify how intraspecific diversity, via cultivars, changes global projections of growing areas. We focus on a crop that spans diverse climates, has the necessary records, and is clearly impacted by climate change: winegrapes (predominantly Vitis vinifera subspecies vinifera). We draw on long-term French records to extrapolate globally for 11 cultivars (varieties) with high diversity in a key trait for climate change adaptation—phenology. We compared scenarios where growers shift to more climatically suitable cultivars as the climate warms or do not change cultivars. We find that cultivar diversity more than halved projected losses of current winegrowing areas under a 2 °C warming scenario, decreasing areas lost from 56 to 24%. These benefits are more muted at higher warming scenarios, reducing areas lost by a third at 4 °C (85% versus 58%). Our results support the potential of in situ shifting of cultivars to adapt agriculture to climate change—including in major winegrowing regions—as long as efforts to avoid higher warming scenarios are successful.

  • agrobiodiversity
  • resilience
  • phenology
  • agriculture
  • climate change adaptation

Footnotes

  • ↵1To whom correspondence may be addressed. Email: ignacio.moralesc{at}uah.es.
  • Author contributions: I.M.-C., I.G.d.C.-A., B.I.C., T.L., A.P., C.v.L., K.A.N., and E.M.W. designed research; I.M.-C. and E.M.W. performed research; I.M.-C., I.G.d.C.-A., and E.M.W. analyzed data; I.M.-C. and E.M.W. wrote the paper; I.M.-C., I.G.d.C.-A., B.I.C., T.L., A.P., C.v.L., K.A.N., and E.M.W. contributed ideas; I.M.-C., I.G.d.C.-A., B.I.C., T.L., A.P., C.v.L., K.A.N., and E.M.W. edited the manuscript; I.M.-C. designed and produced the figures; I.G.d.C.-A., B.I.C., and A.P. contributed to the writing of supporting information; and A.P. built the database.

  • The authors declare no competing interest.

  • This article is a PNAS Direct Submission.

  • Data deposition: Analyses other than phenological parameterization and cross-validation utilized custom computer R code, freely available at GitHub, https://github.com/MoralesCastilla/PhenoDiversity.

  • This article contains supporting information online at https://www.pnas.org/lookup/suppl/doi:10.1073/pnas.1906731117/-/DCSupplemental.

Published under the PNAS license.

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Diversity buffers winegrowing regions from climate change losses
Ignacio Morales-Castilla, Iñaki García de Cortázar-Atauri, Benjamin I. Cook, Thierry Lacombe, Amber Parker, Cornelis van Leeuwen, Kimberly A. Nicholas, Elizabeth M. Wolkovich
Proceedings of the National Academy of Sciences Jan 2020, 201906731; DOI: 10.1073/pnas.1906731117

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Diversity buffers winegrowing regions from climate change losses
Ignacio Morales-Castilla, Iñaki García de Cortázar-Atauri, Benjamin I. Cook, Thierry Lacombe, Amber Parker, Cornelis van Leeuwen, Kimberly A. Nicholas, Elizabeth M. Wolkovich
Proceedings of the National Academy of Sciences Jan 2020, 201906731; DOI: 10.1073/pnas.1906731117
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