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Vegetation productivity under climate change depends on landscape complexity in tropical drylands

Author

Listed:
  • Helder F. P. Araujo

    (Federal University of Paraíba
    Federal University of Paraíba)

  • Célia C. C. Machado

    (Universidade Estadual da Paraíba)

  • Ana Carolina Flores Alves

    (Federal University of Paraíba)

  • Mônica Costa Lima

    (Federal University of Paraíba)

  • José Maria Cardoso Silva

    (University of Miami)

Abstract

Models suggest that extreme drought events induced by climate change can reduce the vegetation productivity of drylands and negatively influence millions of people living in these areas. However, the complexity of landscapes can moderate how much such events impact their vegetation productivity. Accordingly, more complex landscapes are expected to be less likely to experience drought-induced vegetation productivity loss than less complex landscapes. Understanding the relationship between loss of vegetation productivity and the landscape complexity during drought events is fundamental to designing sound adaptation policies and practices for dryland societies. We evaluated the effects of variation in annual precipitation and complexity on the vegetation productivity of 33 landscapes in the Caatinga, the largest region of tropical dry forests in South America, before, during, and after one of the region’s worst drought events the past 30 years. We combined field measurements, satellite images, and modeling to quantify the vegetation productivity and landscape complexity. In general, our results show that the vegetation productivity of more complex landscapes was always higher than in less complex landscapes throughout the study period. However, the difference in vegetation productivity between landscapes with different complexities was more pronounced during the drought years. In addition, we found that the landscape complexity positively influenced vegetation productivity in all years, but that precipitation had no effect on vegetation productivity during the driest and wettest years. Our results indicate that maintaining more complex landscapes is the best adaptive strategy to guarantee drylands vegetation productivity during extreme climatic events.

Suggested Citation

  • Helder F. P. Araujo & Célia C. C. Machado & Ana Carolina Flores Alves & Mônica Costa Lima & José Maria Cardoso Silva, 2022. "Vegetation productivity under climate change depends on landscape complexity in tropical drylands," Mitigation and Adaptation Strategies for Global Change, Springer, vol. 27(8), pages 1-15, December.
    • Handle: RePEc:spr:masfgc:v:27:y:2022:i:8:d:10.1007_s11027-022-10033-6
    DOI: 10.1007/s11027-022-10033-6
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    References listed on IDEAS

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    1. Scott R. Loarie & Philip B. Duffy & Healy Hamilton & Gregory P. Asner & Christopher B. Field & David D. Ackerly, 2009. "The velocity of climate change," Nature, Nature, vol. 462(7276), pages 1052-1055, December.
    2. Alexis Berg & Kaighin A. McColl, 2021. "No projected global drylands expansion under greenhouse warming," Nature Climate Change, Nature, vol. 11(4), pages 331-337, April.
    3. Araujo, Helder F.P. de & Machado, Célia C.C. & Pareyn, Frans G.C. & Nascimento, Naysa F.F. do & Araújo, Lenyneves D.A. & Borges, Laís A. de A.P. & Santos, Bráulio A. & Beirigo, Raphael M. & Vasconcell, 2021. "A sustainable agricultural landscape model for tropical drylands," Land Use Policy, Elsevier, vol. 100(C).
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