The Photosynthetic System in Tropical Plants Under High Irradiance and Temperature Stress

Krause, G. Heinrich; Winter, Klaus

doi:10.1007/124_2020_44

Cited by 2 publications

(5 citation statements)

References 152 publications

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“…This negative effect of VPD is expected to be amplified by SRAD anomalies, as VPD depends on leaf temperature, which itself increases with SRAD (Grossiord et al, 2020). The negative influence of SRAD anomalies on tree growth may be additive to that of VPD anomalies, as previously shown (Krause & Winter, 2020; Rifai et al, 2018, 2019). Furthermore, positive SRAD anomalies did not enhance tree growth but reduced it, as would be expected from a VPD‐related effect.…”

Section: Discussionsupporting

confidence: 61%

“…The negative influence of SRAD anomalies on tree growth may be additive to that of VPD anomalies, as previously shown (Krause & Winter, 2020;Rifai et al, 2018Rifai et al, , 2019. Furthermore, positive SRAD anomalies did not enhance tree growth but reduced it, as would be expected from a VPD-related effect.…”

Section: F I G U R Esupporting

confidence: 52%

“…However, the effect of SRAD anomalies on tree growth was probably more than a mere reflection of VPD, as anomalies in SRAD and VPD were only moderately correlated ( r = .33, Table S3a). Excess or fluctuating light, and changes in light quantity and quality are other potential mechanisms underlying SRAD anomaly effects, as these can be direct physiological stressors (Krause & Winter, 2020; Roeber et al, 2020), or indirectly influence the response to other abiotic or biotic stresses (Roeber et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

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Tropical tree growth sensitivity to climate is driven by species intrinsic growth rate and leaf traits

Bauman

Fortunel

Cernusak

et al. 2021

Global Change Biology

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A better understanding of how climate affects growth in tree species is essential for improved predictions of forest dynamics under climate change. Long‐term climate averages (mean climate) drive spatial variations in species’ baseline growth rates, whereas deviations from these averages over time (anomalies) can create growth variation around the local baseline. However, the rarity of long‐term tree census data spanning climatic gradients has so far limited our understanding of their respective role, especially in tropical systems. Furthermore, tree growth sensitivity to climate is likely to vary widely among species, and the ecological strategies underlying these differences remain poorly understood. Here, we utilize an exceptional dataset of 49 years of growth data for 509 tree species across 23 tropical rainforest plots along a climatic gradient to examine how multiannual tree growth responds to both climate means and anomalies, and how species’ functional traits mediate these growth responses to climate. We show that anomalous increases in atmospheric evaporative demand and solar radiation consistently reduced tree growth. Drier forests and fast‐growing species were more sensitive to water stress anomalies. In addition, species traits related to water use and photosynthesis partly explained differences in growth sensitivity to both climate means and anomalies. Our study demonstrates that both climate means and anomalies shape tree growth in tropical forests and that species traits can provide insights into understanding these demographic responses to climate change, offering a promising way forward to forecast tropical forest dynamics under different climate trajectories.

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Section: Discussionsupporting

confidence: 61%

Section: F I G U R Esupporting

confidence: 52%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Tropical tree growth sensitivity to climate is driven by species intrinsic growth rate and leaf traits

Bauman

Fortunel

Cernusak

et al. 2021

Global Change Biology

View full text Add to dashboard Cite

show abstract

“…This negative effect of VPD is expected to be amplified by SRAD anomalies, as VPD depends on leaf temperature, which itself increases with SRAD (Grossiord et al 2020). The negative influence of SRAD anomalies on tree growth may be additive to that of VPD anomalies, as previously shown (Rifai et al 2018(Rifai et al , 2019Krause & Winter 2020). Furthermore, positive SRAD anomalies did not enhance tree growth but reduced it, as would be expected if its effect was VPD-related.…”

Section: Discussionmentioning

confidence: 75%

“…However, the effect of SRAD anomalies on tree growth was probably more than a mere reflection of VPD, as anomalies in SRAD and VPD were only moderately correlated (r = 0.33, Table S3a). Excess or fluctuating light, and changes in light quantity and quality are other potential mechanisms underlying SRAD anomaly effects, as these can be direct physiological stressors (Krause & Winter 2020;Roeber et al 2020), or indirectly influence the response to other abiotic or biotic stresses (Roeber et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Tropical tree growth sensitivity to climate is driven by species intrinsic growth rate and leaf traits

Bauman

Fortunel

Cernusak

et al. 2021

Preprint

View full text Add to dashboard Cite

A better understanding of how climate affects growth in tree species is essential for improved predictions of forest dynamics under climate change. Long-term climate averages (mean climate) and short-term deviations from these averages (anomalies) both influence tree growth, but the rarity of long-term data integrating climatic gradients with tree censuses has so far limited our understanding of their respective role, especially in tropical systems. Here, we combined 49 years of growth data for 509 tree species across 23 tropical rainforest plots along a climatic gradient to examine how tree growth responds to both climate means and anomalies, and how species functional traits mediate these tree growth responses to climate. We showed that short-term, anomalous increases in atmospheric evaporative demand and solar radiation consistently reduced tree growth. Drier forests and fast-growing species were more sensitive to water stress anomalies. In addition, species traits related to water use and photosynthesis partly explained differences in growth sensitivity to both long-term and short-term climate variations. Our study demonstrates that both climate means and anomalies shape tree growth in tropical forests, and that species traits can be leveraged to understand these demographic responses to climate change, offering a promising way forward to forecast tropical forest dynamics under different climate trajectories.

show abstract

The Photosynthetic System in Tropical Plants Under High Irradiance and Temperature Stress

Cited by 2 publications

References 152 publications

Tropical tree growth sensitivity to climate is driven by species intrinsic growth rate and leaf traits

Tropical tree growth sensitivity to climate is driven by species intrinsic growth rate and leaf traits

Tropical tree growth sensitivity to climate is driven by species intrinsic growth rate and leaf traits

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