Genomic analyses point to a low evolutionary potential of prospective source populations for assisted migration in a forest herb

Daele, Frederik Van; Honnay, Olivier; Kort, Hanne De

doi:10.1111/eva.13485

Cited by 4 publications

(4 citation statements)

References 140 publications

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“…Nonetheless, climate change can affect both species distributions and PGD 34,35 and, thus, needs to be accounted for in the design of monitoring projects. Genetic characteristics of populations at environmental niche margins could make them critical resources for managing the impacts of climate change, such as through translocation programs 36,37 (but see 38 ). However, monitoring neutral genetic markers and indicators of effective population size alone is unlikely to provide representative data on the ability of populations to adapt to changing environments, such as caused by ongoing climate change, because of weak correlation between population genetic marker loci and specific genetic variants affecting functional traits that confer adaptation to environment [39][40][41] .…”

Section: Discussionmentioning

confidence: 99%

Conserving genetic diversity during climate change: Niche marginality and discrepant monitoring capacity in Europe

Pearman

Broennimann

Albayrak

et al. 2023

Preprint

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Genetic monitoring of populations currently attracts interest in the context of the Convention on Biological Diversity but needs long-term planning and investments. Genetic diversity has been largely neglected in biodiversity monitoring, and when addressed is treated separately, detached from other conservation issues, such as habitat alteration due to climate change. Genetic monitoring supports the conservation and management of fisheries, game, and threatened populations. It also can contribute to the assessment of predicted and realized impacts of climate change, and their management. We report the first accounting of genetic monitoring efforts among countries in Europe (their genetic monitoring capacity, GMC) to determine where GMC suggests the combination of national infrastructure, political support and resources for continued and expanded monitoring. Overlaying GMC with areas where species ranges approach current and future climate niche limits (i.e., niche marginality) helps identify whether GMC coincides with anticipated climate change effects on biodiversity. Our analysis suggests that country area extent, financial resources, and conservation policy influence GMC, high values of which inconsistently match joint species patterns of climate niche marginality. Populations at niche margins likely hold genetic diversity that is important to adaptation to changing climate, and our results illuminate the need in Europe for expanded genetic monitoring across the climate gradients occupied by species, a need arguably greatest in southeastern European countries.

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Section: Discussionmentioning

confidence: 99%

Conserving genetic diversity during climate change: Niche marginality and discrepant monitoring capacity in Europe

Pearman

Broennimann

Albayrak

et al. 2023

Preprint

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“…Pollinator signalling was particularly noticeable in southern fragmented populations, pointing to interactive selection effects of both climate and habitat fragmentation. A long‐standing biogeographical history in southern refugia, shaped by historical co‐evolutionary dynamics with pollinators, may have contributed to the more noticeable pollinator signalling and differentiation in pollinator signalling between fragmented and non‐fragmented habitats in these regions (Excoffier et al., 2009; Hegland et al., 2009; Van Daele et al., 2022). In addition, contemporary climate‐driven gradients in the pollinator community likely contributed to this pattern (Ganuza et al., 2022; Ollerton, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…Attraction mechanisms, such as bullseye patterns and UV signalling, can enhance pollinator orientation, and the reduced pollinator availability in fragmented habitats could therefore exert selective pressure on flowers with increased pollinator signalling (Chittka & Wells, 2004;Koski & Ashman, 2014). Pollinator signalling was mainly observed in southern fragmented populations, which may be linked to the biogeographical history along the range or to climate-driven gradients in the pollinator community (Ganuza et al, 2022;Van Daele et al, 2022). Future phylogenetically-controlled analyses could help discern how the increased reflection (higher PC1 values of median UV red, green and blue bands) in fragmented southern populations affects pollinators and how this related to the limited or altered pollinator community in these habitats.…”

Section: The Role Of Habitat Fragmentation In Shaping Mating Systemsmentioning

confidence: 99%

Habitat fragmentation affects climate adaptation in a forest herb

Van Daele,

Honnay,

Janssens

et al. 2023

Journal of Ecology

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Climate change and the resulting increased drought frequencies pose considerable threats to forest herb populations, particularly where additional environmental challenges jeopardize responses to selection. Specifically, habitat fragmentation may hamper climate adaptation by altering the distribution of adaptive genetic variation and may also induce evolutionary changes in mating systems. To assess how habitat fragmentation disrupts climate adaptation, we conducted a common garden experiment with Primula elatior offspring originating from 24 populations sampled along a latitudinal gradient with varying climate and landscape characteristics. We then quantified a range of vegetative, regulatory and reproductive traits under distinct soil moisture regimes to evaluate imprints of local adaptation and phenotypic plasticity. Additionally, we conducted a more extensive field campaign in 60 populations along the same latitudinal gradient to evaluate the potential evolutionary breakdown of reciprocal herkogamy. For large, connected populations, our results demonstrated an evolutionary shift from a strategy in southern populations that seems aligned with drought avoidance—where plants minimize their exposure to dry conditions and optimize photosynthesis—to a drought tolerance strategy in northern populations, where plants are adapted to function despite water scarcity. However, habitat fragmentation disrupted climate clines and the adaptive responses to drought stress in key traits related to growth, biomass allocation and water regulation. Additionally, our findings indicate the onset of evolutionary breakdown in reciprocal herkogamy and divergence in other key flower traits. The disruption of climate clines, drought responses and adaptations in mating systems contributed to a substantially diminished flowering investment across the distribution range, with the most pronounced effects observed in southern fragmented populations. Synthesis. We present novel empirical evidence of how habitat fragmentation disrupts climate adaptation and drought tolerance in a wide range of traits along the range of the forest herb Primula elatior. These findings emphasize the need to account for habitat fragmentation while designing effective conservation strategies in order to preserve and restore resilient meta‐populations of forest herbs amidst ongoing global changes.

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“…Genetic characteristics of populations at environmental niche margins could make these populations critical resources for managing the impacts of climate change, such as through translocation programmes 36,37 (but see ref. 38). However, monitoring neutral genetic markers and indicators of effective population size alone is unlikely to provide representative data on the ability of populations to adapt to changing environments (for example, caused by ongoing climate change), because of weak correlations between population genetic marker loci and specific genetic variants affecting functional traits that confer adaptation to the environment [39][40][41] .…”

Section: Articlementioning

confidence: 99%

Monitoring of species’ genetic diversity in Europe varies greatly and overlooks potential climate change impacts

Pearman,

Broennimann,

Aavik

et al. 2024

Nat Ecol Evol

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Genetic monitoring of populations currently attracts interest in the context of the Convention on Biological Diversity but needs long-term planning and investments. However, genetic diversity has been largely neglected in biodiversity monitoring, and when addressed, it is treated separately, detached from other conservation issues, such as habitat alteration due to climate change. We report an accounting of efforts to monitor population genetic diversity in Europe (genetic monitoring effort, GME), the evaluation of which can help guide future capacity building and collaboration towards areas most in need of expanded monitoring. Overlaying GME with areas where the ranges of selected species of conservation interest approach current and future climate niche limits helps identify whether GME coincides with anticipated climate change effects on biodiversity. Our analysis suggests that country area, financial resources and conservation policy influence GME, high values of which only partially match species’ joint patterns of limits to suitable climatic conditions. Populations at trailing climatic niche margins probably hold genetic diversity that is important for adaptation to changing climate. Our results illuminate the need in Europe for expanded investment in genetic monitoring across climate gradients occupied by focal species, a need arguably greatest in southeastern European countries. This need could be met in part by expanding the European Union’s Birds and Habitats Directives to fully address the conservation and monitoring of genetic diversity.

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Genomic analyses point to a low evolutionary potential of prospective source populations for assisted migration in a forest herb

Cited by 4 publications

References 140 publications

Conserving genetic diversity during climate change: Niche marginality and discrepant monitoring capacity in Europe

Conserving genetic diversity during climate change: Niche marginality and discrepant monitoring capacity in Europe

Habitat fragmentation affects climate adaptation in a forest herb

Monitoring of species’ genetic diversity in Europe varies greatly and overlooks potential climate change impacts

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