The impact of climate change and increased drought frequencies on forest herb persistence is expected to be significant. The adaptive capacity of forest herbs will depend on their long-standing imprints of local adaptation and phenotypic plasticity. In a recent study, researchers evaluated how local adaptation to habitat fragmentation affects climate adaptation in Primula elatior, a forest herb. They quantified a wide range of traits in a common garden experiment, including germination lag time, germination rate, growth rate, root:shoot ratio, specific leaf area, stomatal density, glandular trichome density, flower phenology and flower investment. To further evaluate mating shifts they also measured flower colour adaptations, herkogamy (the spatial separation between anthers and stigma), and self-incompatibility. The results showed that local adaptations in P. elatior displayed strong alignment with climate along its range. Northern populations displayed reduced establishment and competitive potential while southern populations were highly sensitive to increased drought stress under climate change. Habitat fragmentation resulted in the evolutionary breakdown of reciprocal herkogamy (whereby the position of anthers and stigma differ between flowers) and biochemical self-compatibility in S morphs (a type of floral morphology). Furthermore, there was a significant differentiation of the flower colour attraction patterns observed in the south of the range along with strongly reduced flowering investment. Fragmented populations also displayed a strategic developmental focus on survival and stress resistance which could have far-reaching effects on (meta-)population dynamics under climate change. These findings suggest that the interaction between local adaptation to climate and habitat fragmentation could limit the successful application of assisted migration strategies for P. elatior. Overall this study highlights how important it is to consider both local adaptation to climate as well as habitat fragmentation when assessing population responses to environmental changes such as those brought about by global warming.
Climate change and drought will affect forest herbs. Forest herbs can adapt to changes through local adaptation and phenotypic plasticity. Researchers studied how habitat fragmentation affects Primula elatior, a forest herb's ability to adapt to climate change. They measured various traits in a common garden experiment and found that P. elatior's adaptations align with its range's climate. Northern populations had lower potential while southern populations were sensitive to drought stress.
The Impact of Climate Change and Increased Drought Frequencies on Forest Herb Persistence
"The adaptive capacity of forest herbs will depend on their long-standing imprints of local adaptation and phenotypic plasticity."
In a recent study, researchers evaluated how local adaptation to habitat fragmentation affects climate adaptation in Primula elatior, a forest herb. They quantified a wide range of traits in a common garden experiment, including germination lag time, germination rate, growth rate, root:shoot ratio, specific leaf area, stomatal density, glandular trichome density, flower phenology and flower investment. To further evaluate mating shifts they also measured flower colour adaptations, herkogamy (the spatial separation between anthers and stigma), and self-incompatibility.
The results showed that local adaptations in P. elatior displayed strong alignment with climate along its range. Northern populations displayed reduced establishment and competitive potential while southern populations were highly sensitive to increased drought stress under climate change.
Habitat fragmentation resulted in the evolutionary breakdown of reciprocal herkogamy (whereby the position of anthers and stigma differ between flowers) and biochemical self-compatibility in S morphs (a type of floral morphology). Furthermore there was a significant differentiation of the flower colour attraction patterns observed in the south of the range along with strongly reduced flowering investment.
Fragmented populations also displayed a strategic developmental focus on survival and stress resistance which could have far-reaching effects on (meta-)population dynamics under climate change. These findings suggest that the interaction between local adaptation to climate as well as habitat fragmentation could limit the successful application of assisted migration strategies for P. elatior.
Overall this study highlights how important it is to consider both local adaptation to climate as well as habitat fragmentation when assessing population responses to environmental changes such as those brought about by global warming.
Climate change and increased drought frequencies are expected to have a major impact on forest herb persistence. The adaptive capacity of forest herbs will depend on their long standing imprints of local adaptation and phenotypic plasticity. To evaluate how local adaptation to habitat fragmentation affects climate adaptation we quantified a wide range of traits in a common garden experiment of Primula elatior. Specifically, we disentangled the relative contribution of climate, habitat fragmentation, and drought stress on trait variation of the germination lag time, germination rate, growth rate, root:shoot ratio, specific leaf area, stomatal density, glandular trichome density, flower phenology and flower investment. To further evaluate mating shifts we quantified flower colour adaptations, herkogamy, and self-incompatibility. Local adaptations in P. elatior displayed strong alignment with climate along its range. Northern populations displayed a reduced establishment and competitive potential, while southern populations displayed a high sensitivity to increased drought stress under climate change. Habitat fragmentation resulted in the evolutionary breakdown of reciprocal herkogamy, and a biochemical self-compatibility in S morphs. Furthermore, a significant differentiation of the flower colour attraction patterns and a strongly reduced flowering investment was observed in the south of the range. Fragmented populations also displayed a strategic developmental focus on survival and stress resistance. The interaction between local adaptation to climate and habitat fragmentation could have far reaching effects on (meta-)population dynamics under climate change and could limit the successful application of assisted migration strategies.
