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<p>Climate change in cloud forests poses significant threats to endemic species with narrow ecological niches. We investigated how micrometeorological dynamics influence the radial stem growth of <i>Crinodendron brasiliense</i> Reitz &amp; L.B.Sm., a threatened endemic tree restricted to subtropical cloud forests above 1,500&#xa0;m in Brazil’s Atlantic Forest. Five individuals were monitored in Urubici, southern Brazil, using automatic dendrometers recording hourly measurements from 2021 to 2023, alongside meteorological data and drought indices. Linear mixed-effects model revealed significant interannual variation in growth, with higher increments in 2021 and 2023 compared to 2022 (<i>p</i> &lt; 0.05). Growth seasonal peaks occurred in summer (December-February), ceasing by March each year. Generalized linear mixed model with temporal autocorrelation identified maximum daily temperature as the main driver of radial growth (<i>p</i> &lt; 0.001), and revealed a marginally significant three‑way interaction (temperature × fog × PDSI; <i>p</i> = 0.063), suggesting fog may buffer drought‑ and heat‑induced growth limitations. These findings suggest that <i>C. brasiliense growth</i> is sensitive to variations in temperature, fog, and moisture conditions, indicating that climate-driven changes in these environmental factors could potentially affect this endemic species.</p>

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Fog and moisture conditions modulate the effect of temperature on radial growth of an endemic cloud forest tree

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • Guilherme Schneider de Moura,
  • Ana Carolina da Silva,
  • Bianca Lamounier da Silva Lima,
  • Victoria Oliveira Cabral Hassan,
  • Luisa Vitoria da Rocha Reis,
  • Clenio Vieira Oliveira,
  • Pedro Higuchi

摘要

Climate change in cloud forests poses significant threats to endemic species with narrow ecological niches. We investigated how micrometeorological dynamics influence the radial stem growth of Crinodendron brasiliense Reitz & L.B.Sm., a threatened endemic tree restricted to subtropical cloud forests above 1,500 m in Brazil’s Atlantic Forest. Five individuals were monitored in Urubici, southern Brazil, using automatic dendrometers recording hourly measurements from 2021 to 2023, alongside meteorological data and drought indices. Linear mixed-effects model revealed significant interannual variation in growth, with higher increments in 2021 and 2023 compared to 2022 (p < 0.05). Growth seasonal peaks occurred in summer (December-February), ceasing by March each year. Generalized linear mixed model with temporal autocorrelation identified maximum daily temperature as the main driver of radial growth (p < 0.001), and revealed a marginally significant three‑way interaction (temperature × fog × PDSI; p = 0.063), suggesting fog may buffer drought‑ and heat‑induced growth limitations. These findings suggest that C. brasiliense growth is sensitive to variations in temperature, fog, and moisture conditions, indicating that climate-driven changes in these environmental factors could potentially affect this endemic species.