Thermotolerance capacities of native and exotic coastal plants will lead to changes in species composition under increased heat waves

French, Kristine; Robinson, Sharon A.; Lia, Jodie

doi:10.1093/conphys/cox029

Cited by 13 publications

(13 citation statements)

References 43 publications

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“…Overall, the increase in temperature was beneficial to black locust development, even when simulating a heatwave. Similarly, resilience to extreme temperature was found in invasive shrubs compared to native shrubs in Australia (French et al 2017). Consequently, as long as water is available, the increase in temperature induced by climate change is likely to favour the development of black locust in Europe.…”

Section: Discussionmentioning

confidence: 96%

The seeds of invasion: enhanced germination in invasive European populations of black locust (Robinia pseudoacacia L.) compared to native American populations

et al. 2021

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Local adaptation and the evolution of phenotypic plasticity may facilitate biological invasions. Both processes can enhance germination and seedling recruitment, which are crucial life-history traits for plants. The rate, timing and speed of germination have recently been documented as playing a major role during the invasion process. Black locust (Robinia pseudoacacia L.) is a North American tree, which has spread widely throughout Europe. A recent study demonstrated that a few populations are the source of European black locust. Thus, invasive populations can be compared to native ones in order to identify genetic-based phenotypic differentiation and the role of phenotypic plasticity can thereby be assessed.• A quantitative genetics experiment was performed to evaluate 13 juvenile traits of both native and invasive black locust populations (3000 seeds, 20 populations) subjected to three different thermal treatments (18 °C, 22 °C and 31 °C).• The results revealed European populations to have a higher germination rate than the native American populations (88% versus 60%), and even when genetic distance between populations was considered. Moreover, this trait showed lower plasticity to temperature in the invasive range than in the native one. Conversely, other studied traits showed high plasticity to temperature, but they responded in a similar way to temperature increase: the warmer the temperature, the higher the growth rate or germination traits values.• The demonstrated genetic differentiation between native and invasive populations testifies to a shift between ranges for the maximum germination percentage. This pattern could be due to human-mediated introduction of black locust.

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Section: Discussionmentioning

confidence: 96%

The seeds of invasion: enhanced germination in invasive European populations of black locust (Robinia pseudoacacia L.) compared to native American populations

et al. 2021

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“…was not different between exotic and native species. Previous studies showed that high heat tolerance in exotic species may have facilitated their current establishment, and increased the probability of future invasions (French et al, 2017;Song et al, 2010). If high heat tolerance of exotic Zingiberales is associated with an increase in fitness in novel environments, this trait may be favoured by selection in future climates.…”

Section: Discussionmentioning

confidence: 99%

Evolutionary history constrains heat tolerance of native and exotic tropical Zingiberales

et al. 2022

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1. Tropical wet forest plants experience relatively stable temperatures throughout the year. However, tropical forests represent a mosaic of habitats characterized by different temperatures. Heat tolerances are expected to be adapted to temperatures specific to their habitats. Although heat tolerance of species sharing similar environments is expected to be similar, it is also possible that heat tolerance is constrained by evolutionary history because closely related species usually display similar physiologies. When exotic species are introduced to novel communities, colonization may be facilitated by their previous adaptation to high temperatures and other physiological, genetic and demographic traits, which may grant them some competitive advantage. Increasing temperatures may represent a strong environmental filter affecting community assembly, and higher heat tolerances could facilitate the persistence of exotic species in novel environments.2. Using a community of 32 native and 7 exotic Zingiberales species from different tropical habitats in Costa Rica, Central America, we aim to answer the following questions: (a) does evolutionary history constrain heat tolerance? (b) do plants in the same habitat display similar heat tolerances? (c) do the heat tolerances of exotic species differ from those of native species? 3. We measured temperature-dependent changes in photosynthetic fluorescence to determine the temperature at which the first sign of damage to photosystem II is observed (T 15 ), and the temperature at which the fluorescence of photosystem II is reduced by 50% (T 50 ). Using a community phylogeny, we tested for phylogenetic signal in T 15 and T 50 . In addition, we tested for differences in heat tolerance among Zingiberales from old growth, secondary forests and open areas, as well as between native and exotic species.

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“…Improvements in fluorometers used to measure chlorophyll fluorescence—an analog of electron transport capacity during Photosystem II ( Maxwell and Johnson, 2000 )—are also facilitating new opportunities to comprehensively evaluate the potential performance of photosynthetic tissues under stress. Consequently, measurements of chlorophyll fluorescence, coupled with other leaf trait analyses are providing conservation physiologists with new metrics to evaluate plant stress responses to thermal extremes and other potential stressors ( Arroyo-Pérez et al , 2017 ; French et al , 2017 ).…”

Section: Next Steps: Continuing To Improve the Value Of The Toolboxmentioning

confidence: 99%

The conservation physiology toolbox: status and opportunities

Madliger

Love

Hultine

et al. 2018

Conservation Physiology

109

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For over a century, physiological tools and techniques have been allowing researchers to characterize how organisms respond to changes in their natural environment and how they interact with human activities or infrastructure. Over time, many of these techniques have become part of the conservation physiology toolbox, which is used to monitor, predict, conserve, and restore plant and animal populations under threat. Here, we provide a summary of the tools that currently comprise the conservation physiology toolbox. By assessing patterns in articles that have been published in ‘Conservation Physiology’ over the past 5 years that focus on introducing, refining and validating tools, we provide an overview of where researchers are placing emphasis in terms of taxa and physiological sub-disciplines. Although there is certainly diversity across the toolbox, metrics of stress physiology (particularly glucocorticoids) and studies focusing on mammals have garnered the greatest attention, with both comprising the majority of publications (>45%). We also summarize the types of validations that are actively being completed, including those related to logistics (sample collection, storage and processing), interpretation of variation in physiological traits and relevance for conservation science. Finally, we provide recommendations for future tool refinement, with suggestions for: (i) improving our understanding of the applicability of glucocorticoid physiology; (ii) linking multiple physiological and non-physiological tools; (iii) establishing a framework for plant conservation physiology; (iv) assessing links between environmental disturbance, physiology and fitness; (v) appreciating opportunities for validations in under-represented taxa; and (vi) emphasizing tool validation as a core component of research programmes. Overall, we are confident that conservation physiology will continue to increase its applicability to more taxa, develop more non-invasive techniques, delineate where limitations exist, and identify the contexts necessary for interpretation in captivity and the wild.

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Thermotolerance capacities of native and exotic coastal plants will lead to changes in species composition under increased heat waves

Abstract: Placing native and exotic coastal plants under an experimental heatwave regime, allowed us to show that native shrubs are more likely to be at risk from the predicted increase in heat waves. C3 grasses are also likely to be less competitive relative to C4 grasses.

Cited by 13 publications

References 43 publications

The seeds of invasion: enhanced germination in invasive European populations of black locust (Robinia pseudoacacia L.) compared to native American populations

The seeds of invasion: enhanced germination in invasive European populations of black locust (Robinia pseudoacacia L.) compared to native American populations

Evolutionary history constrains heat tolerance of native and exotic tropical Zingiberales

The conservation physiology toolbox: status and opportunities

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