Germination temperature sensitivity differs between co‐occurring tree species and climate origins resulting in contrasting vulnerability to global warming

Filipe, João C.; Ahrens, Collin C.; Byrne, Margaret; Hardy, G.E.St.J.; Rymer, Paul D.

doi:10.1002/pei3.10108

Plant Enviro Interactions

2023

DOI: 10.1002/pei3.10108

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Germination temperature sensitivity differs between co‐occurring tree species and climate origins resulting in contrasting vulnerability to global warming

João C. Filipe

Collin C. Ahrens

Margaret Byrne

et al.

Abstract: Rapid anthropogenic climate change is decoupling organisms from their natural thermal ranges (Cheaib et al., 2012;Cobb et al., 2017).Temperatures will continue to change over the next 100 years and particularly exacerbated if emissions remain unchanged (IPCC, 2021). The dissociation between population-specific adaptations and future temperature might cause reductions in population

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2024

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Cited by 6 publications

References 159 publications

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Macroclimatic Convergence and Habitat Specialisation Shape the Mediterranean Seed Germination Syndrome

Cruz‐Tejada,

Mattana,

Rosbakh

et al. 2024

Ecology and Evolution

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Ecological theory predicts that plant reproductive phenology in the Mediterranean regions is shaped by evolutionary processes driven by strong seasonality in precipitation–evaporation patterns. Thus, it can be expected that seed germination phenology has adapted to maximise recruitment during the season of highest water availability. Cold‐cued and slow germination (i.e., the ‘Mediterranean seed germination syndrome’) has been hypothesised to be an adaptation to ensure that seedling emergence occurs in autumn/early winter, extending the growing season before the subsequent unfavourable summer drought. However, this hypothesis has been tested on individual species or local studies, without a proper synthesis for the whole Mediterranean region. Here we tested, for the first time, the Mediterranean seed germination syndrome using experimental data for 459 species (11,363 records, 59 families) occurring in the Mediterranean Basin. We performed a phylogenetically informed Bayesian meta‐analysis to model the effect on germination proportions of seven key experimental cues: mean incubation temperature, alternating temperature regime, light and dormancy‐breaking treatments (scarification, warm stratification and cold stratification) and the modulating role of seed mass on seed germination. We show that species from lowland zonal habitats of the Mediterranean align with the Mediterranean germination syndrome hypothesis, with their seeds responding positively to cool, constant temperatures and negatively to light. Yet, habitat specialists (i.e., species restricted to mountains, coasts and wetlands) deviate from the syndrome, showing nearly opposite germination requirements. Seed mass further influences the germination niche and phylogenetically related species exhibit similar germination responses. Cumulatively, these results suggest that evolutionary pressures from local habitat‐related conditions override the macroclimatically imposed Mediterranean seed germination syndrome.

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Macroclimatic Convergence and Habitat Specialisation Shape the Mediterranean Seed Germination Syndrome

Cruz‐Tejada,

Mattana,

Rosbakh

et al. 2024

Ecology and Evolution

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Light stress conditions affect variability in the phenotypic expression of germination in Mammillaria carnea from different origins and genetic families

Matus,

Perroni,

Flores

et al. 2024

Flora

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Geographic variation in reproductive traits and germination-niche dynamics in conservation-dependent Banksia arborea populations restricted to banded ironstone formations

Anderson,

Tudor,

Turner

et al. 2024

Flora

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Germination temperature sensitivity differs between co‐occurring tree species and climate origins resulting in contrasting vulnerability to global warming

Cited by 6 publications

References 159 publications

Macroclimatic Convergence and Habitat Specialisation Shape the Mediterranean Seed Germination Syndrome

Macroclimatic Convergence and Habitat Specialisation Shape the Mediterranean Seed Germination Syndrome

Light stress conditions affect variability in the phenotypic expression of germination in Mammillaria carnea from different origins and genetic families

Geographic variation in reproductive traits and germination-niche dynamics in conservation-dependent Banksia arborea populations restricted to banded ironstone formations

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