Climate Constrains Photosynthetic Strategies in Darwin’s Daisies: A Test of the Climatic Variability and Jack-of-All-Trades Hypotheses

Perez, Timothy M.; Andino, Juan Ernesto Guevara; Rivas‐Torres, Gonzalo; Feeley, Kenneth J.

doi:10.1086/721957

Cited by 5 publications

(6 citation statements)

References 54 publications

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“…Recent work has supported this hypothesis for photosynthetic performance of Scalesia spp. in the Galapagos, with a positive relationship between climatic temperature variability and the breadth of photosynthetic performance (Perez et al ., 2023). However, a recent comparison of temperate, subtropical, and tropical rainforest species in Australia documented substantial acclimation potential of photosynthesis and respiration to experimental warming, with even more acclimation of the temperature optimum of photosynthesis in tropical and subtropical species relative to temperate species (Choury et al ., 2022).…”

Section: Discussionmentioning

confidence: 99%

Pushing the envelope: do narrowly and widely distributed Eucalyptus species differ in response to climate warming?

Drake,

Vårhammar,

Aspinwall

et al. 2024

New Phytologist

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Summary Contemporary climate change will push many tree species into conditions that are outside their current climate envelopes. Using the Eucalyptus genus as a model, we addressed whether species with narrower geographical distributions show constrained ability to cope with warming relative to species with wider distributions, and whether this ability differs among species from tropical and temperate climates. We grew seedlings of widely and narrowly distributed Eucalyptus species from temperate and tropical Australia in a glasshouse under two temperature regimes: the summer temperature at seed origin and +3.5°C. We measured physical traits and leaf‐level gas exchange to assess warming influences on growth rates, allocation patterns, and physiological acclimation capacity. Warming generally stimulated growth, such that higher relative growth rates early in development placed seedlings on a trajectory of greater mass accumulation. The growth enhancement under warming was larger among widely than narrowly distributed species and among temperate rather than tropical provenances. The differential growth enhancement was primarily attributable to leaf area production and adjustments of specific leaf area. Our results suggest that tree species, including those with climate envelopes that will be exceeded by contemporary climate warming, possess capacity to physiologically acclimate but may have varying ability to adjust morphology.

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Section: Discussionmentioning

confidence: 99%

Pushing the envelope: do narrowly and widely distributed Eucalyptus species differ in response to climate warming?

Drake,

Vårhammar,

Aspinwall

et al. 2024

New Phytologist

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“…Expanding the climate range of performance observations is a key next step in assessing this framework. Furthermore, progress in predicting species responses to warming using their temperature niche will come from increased measurements of physiological performance over temperature gradients (Michaletz et al, 2015; Perez et al, 2023; Reich et al, 2015; Yamori et al, 2014) which will better characterize a species niche. Our work presented here can serve as the prior information to inform such physiologically based investigations and assess/resolve the issues of using observed distributions to infer a species' niche characteristics.…”

Section: Discussionmentioning

confidence: 99%

Section: Does Species' Performance Peak Away From Their Temperature N...mentioning

confidence: 99%

“…Moutouama & Gaoue, 2023) will constrain the observed distribution to a subset of possible climates. Ultimately, climate niche centres should be derived from physiological response curves (Michaletz et al, 2015; Perez et al, 2023), but such physiological data are lacking for the vast majority of species. Therefore, using species distributions to estimate climate niche centres is a pragmatic solution that allows testing hypotheses across large numbers of species, given predictions of climate suitability are generally well related to physiological climate performance (VanDerWal et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Traits help explain species' performance away from their climate niche centre

Lynn

Gya

Klanderud

et al. 2023

Diversity and Distributions

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“…The climate variability hypothesis (CVH) predicts that species will evolve wider thermal tolerance breadths in environments with more variable temperatures and thermal specialisation (narrow TTB) in thermally stable environments, a concept largely supported in animals (i.e Compton et al ., 2007; Sunday et al ., 2011). Of the few studies testing this hypothesis on plants, investigations have included phenotypic plasticity increases with latitude (Molina-Montenegro & Naya, 2012), species distribution ranges with seasonality across elevation (Mumladze et al ., 2017) and the breadth of photosynthetic thermal response with environmental temperature variability (Perez et al ., 2023). Here we explored the CVH by sampling for thermal tolerance metrics including TTB on species growing in three contrasting biomes, two extreme and more variable, one benign and more thermally stable.…”

Section: Discussionmentioning

confidence: 99%

Drivers of thermal tolerance breadth of plants across contrasting biomes: do mean or seasonality in climate indices matter more?

Briceno,

Arnold,

Cook

et al. 2023

Preprint

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The Climate Variability Hypothesis (CVH) predicts that species from environments with more variable temperatures should havewidethermal tolerance breadth. We addressed this question in plants and asked which climate predictors (e.g., temperature, precipitation, variability/seasonality) best predict species thermal limits.Measures of low (Tcrit-cold) and high (Tcrit-hot) photosystem II thermal thresholds were used to determine thermal tolerance breadth (TTB), along with ice nucleation temperature (NT) of 69 plant species in alpine, desert and temperate biomes.Tolerance metrics Tcrit-cold, NT and Tcrit-hotall differed among biomes. Notably, desert species had the most cold and heat tolerant leaves with the widest TTB. Alpine and temperate biomes had similar TTB and each biome TTB exceeded their climate thermal ranges. Overall, climate drivers explained the most variation (∼50%) in TTB and NT, with species a second strong predictor. The climate variables best explaining tolerance differed for cold and heat: species from more variable (higher temperature seasonality) environments (alpine and desert) were more cold tolerant, whereas mean annual temperature (MAT) was the best predictor of Tcrit-hotwith species in higher MAT environments having higher heat tolerances. TTB and NT were explained by both seasonality and MAT. Unexplained variation could be due to microclimate-driven plasticity, leaf traits or thermoregulatory mechanisms.Our results provide some support for the CVH. Depending on the thermal limits examined, climate means and seasonality remain important predictors of plant thermal tolerance.

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Climate Constrains Photosynthetic Strategies in Darwin’s Daisies: A Test of the Climatic Variability and Jack-of-All-Trades Hypotheses

Cited by 5 publications

References 54 publications

Pushing the envelope: do narrowly and widely distributed Eucalyptus species differ in response to climate warming?

Pushing the envelope: do narrowly and widely distributed Eucalyptus species differ in response to climate warming?

Traits help explain species' performance away from their climate niche centre

Drivers of thermal tolerance breadth of plants across contrasting biomes: do mean or seasonality in climate indices matter more?

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