Fading regulation of diurnal temperature ranges on drought-induced growth loss for drought-tolerant tree species

Xianliang Zhang, Tim Rademacher, Hongyan Liu (), Lu Wang and Rubén D. Manzanedo
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Xianliang Zhang: Hebei Agricultural University
Tim Rademacher: Université du Québec en Outaouais
Hongyan Liu: Peking University
Lu Wang: Peking University
Rubén D. Manzanedo: D-USYS, ETH-Zürich

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Warming-induced droughts caused tree growth loss across the globe, leading to substantial carbon loss to the atmosphere. Drought-induced growth loss, however, can be regulated by changes in diurnal temperature ranges. Here, we investigated long term radial growth responses of 23 widespread distributed tree species from 2327 sites over the world and found that species’ drought tolerances were significantly and positively correlated with diurnal temperature range-growth loss relationships for the period 1901-1940. Since 1940, this relationship has continued to fade, likely due to asymmetric day and night warming trends and the species’ ability to deal with them. The alleviation of reduced diurnal temperature ranges on drought-induced growth loss was mainly found for drought resistant tree species. Overall, our results highlight the need to carefully consider diurnal temperature ranges and species-specific responses to daytime and nighttime warming to explore tree growth responses to current and future warmer and drier climates.

Date: 2023
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DOI: 10.1038/s41467-023-42654-z

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