Concordant phylogeographic responses to large‐scale coastal disturbance in intertidal macroalgae and their epibiota

Parvizi, Elahe; Dutoit, Ludovic; Fraser, Ceridwen I.; Craw, Dave; Waters, Jonathan M.

doi:10.1111/mec.16245

Cited by 5 publications

(12 citation statements)

References 93 publications

(141 reference statements)

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“…Major disturbance events can potentially have parallel effects across large numbers of codistributed species (Hewitt, 2001; Parvizi et al, 2021; Wallis et al, 2016). Along these lines, a recent GBS study of another southern bull kelp species, Durvillaea poha C.I.…”

Section: Discussionmentioning

confidence: 99%

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Parallel recolonizations generate distinct genomic sectors in kelp following high‐magnitude earthquake disturbance

et al. 2022

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Large‐scale disturbance events have the potential to drastically reshape biodiversity patterns. Notably, newly vacant habitat space cleared by disturbance can be colonized by multiple lineages, which can lead to the evolution of distinct spatial “sectors” of genetic diversity within a species. We test for disturbance‐driven sectoring of genetic diversity in intertidal southern bull kelp, Durvillaea antarctica (Chamisso) Hariot, following the high‐magnitude 1855 Wairarapa earthquake in New Zealand. Specifically, we use genotyping‐by‐sequencing (GBS) to analyse fine‐scale population structure across the uplift zone and apply machine learning to assess the fit of alternative recolonizaton models. Our analysis reveals that specimens from the uplift zone carry distinctive genomic signatures potentially linked to post‐earthquake recolonization processes. Specifically, our analysis identifies two parapatric spatial‐genomic sectors of D. antarctica at Turakirae Head, which experienced the most dramatic uplift. Based on phylogeographical modelling, we infer that bull kelp in the Wellington region was probably a source for recolonization of the heavily uplifted Turakirae Head coastline, via two parallel, eastward recolonization events. By identifying multiple parapatric genotypic sectors within a recently recolonized coastal region, the current study provides support for the hypothesis that competing lineage expansions can generate striking spatial structuring of genetic diversity, even in highly dispersive taxa.

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Section: Discussionmentioning

confidence: 99%

“…We used the Recolonization data set to estimate the most likely pattern of recolonization for D. antarctica on Turakirae Head. Following a similar approach to previous studies on Durvillaea (Parvizi et al, 2021), we performed phylogeographical model selection using the R package delimitr 2.0.2 (Smith & Carstens, 2019).…”

Section: Recolonization Modellingmentioning

confidence: 99%

Parallel recolonizations generate distinct genomic sectors in kelp following high‐magnitude earthquake disturbance

et al. 2022

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“…along prehistorically disturbed rocky shores in southern New Zealand has detected uplifted‐associated genetic impacts in intertidal (but not subtidal) species (Figure 1a; Parvizi et al, 2020). Additionally, comparative phylogeographic analysis of these kelps together with their epibiota has revealed signatures of concerted recolonization events following this ancient ecosystem‐wide disturbance (Parvizi et al, 2022).…”

Section: Coastal Genetic Signatures Of Catastrophic Tectonic Processesmentioning

confidence: 99%

“…Additionally, as biotic / life‐history traits (e.g. habitat choice and dispersal capacity) may strongly influence species‐specific responses to disturbance, multispecies approaches are needed to account for such biological variability (Parvizi et al, 2022). In particular, multispecies approaches combining genome‐wide sequencing and paleoenvironmental data (e.g.…”

Section: Conclusion: Future Integration Of Coastal Genomic and Physic...mentioning

confidence: 99%

“…Broadly, multispecies phylogeographic analysis from disturbance‐prone regions has potential to reveal trait‐specific impacts of disturbance (e.g. Parvizi et al, 2022). Comparative genomic approaches coupled with model‐based tests (see Section 7) can elucidate the extent to which deeper‐time or short‐term physical disruptions structure coastal biodiversity.…”

Section: Conclusion: Future Integration Of Coastal Genomic and Physic...mentioning

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Genetic impacts of physical disturbance processes in coastal marine ecosystems

Parvizi

Fraser

Waters

2022

Journal of Biogeography

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Aim Coastal habitats are among the most dynamic environments on earth and are highly vulnerable to large‐scale physical disturbance. Genetic studies of nearshore marine species are revealing long‐lasting signatures of major coastal disturbance events. We synthesize emerging data to highlight how physical perturbations can impact the phylogeographic patterns of coastal populations. Taxon Coastal marine and estuarine taxa. Location Coastal regions around the globe. Methods We synthesize coastal genetic and genomic literature, focussing particularly on the phylogeographic consequences of natural disturbance events including uplift, tsunami, hurricanes, glaciations and sea‐level fluctuations. We focus on studies with clear physical analytical frameworks constrained by abiotic data. Results Tectonic and atmospheric disruptions can be considered shot‐term events with major impacts on populations adjacent to the centre of disturbance, typically resulting in the evolution of shallow phylogeographic patterns. Long‐lived climate‐driven disturbances such as glaciations, however, operate over vast geographic scales and often drive deep evolutionary patterns in affected populations. We show that studies using genome‐wide data could better identify fine‐scale signatures of both past and contemporary habitat perturbations. Conclusions Recent data reveal the interplay between physical upheaval and coastal phylogeography, indicating that disturbance can affect diversity, connectivity and demography of coastal populations. The interplay between long‐lived large‐scale disturbance and species‐specific biotic traits has shaped deep phylogeographic patterns of coastal taxa. Additionally, it could be argued that, at least for some regions, short‐term disturbance is the ‘rule’ rather than the ‘exception’, and thus, represents a key driver of coastal genetic patterns in disturbance prone coastal regions. Geo‐genomic approaches that combine genome‐wide data with explicit habitat models or disturbance history information have been particularly successful in explaining the drivers of coastal evolutionary change. We argue that future integration of genomic and physical data will be crucial for tracing evolutionary trends in fast‐changing marine environments.

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Integrating kelp genomic analyses and geological data to reveal ancient earthquake impacts

Vaux

Fraser

Craw

et al. 2023

J. R. Soc. Interface.

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Detached buoyant kelp can disperse thousands of kilometres at sea and can colonize newly available shores in the wake of disturbances that wipe out competitors. Localized earthquake uplift can cause extirpation of intertidal kelp populations followed by recolonization. Sources of recolonizing kelp can be detectable in genomic structure of contemporary populations. Our field observations combined with LiDAR mapping identified a previously unrecognized zone of uplifted rocky coastline in a region that is slowly subsiding. Intertidal kelp ( Durvillaea antarctica ) on the uplifted section of coast is genetically distinctive from nearby populations, with genomic signatures most similar to that of kelp 300 km to the south. Genetic divergence between these locations suggests reproductive isolation for thousands of years. Combined geological and genetic data suggest that this uplift event occurred during one of four major earthquakes between 6000 and 2000 years ago, with one of the younger events most likely. Extirpation of the pre-existing kelp required sudden uplift of approximately 2 metres, precluding several small incremental uplift events. Our results show the power of integrating biological (genomic) analyses with geological data to understand ancient geological processes and their ecological impacts.

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Concordant phylogeographic responses to large‐scale coastal disturbance in intertidal macroalgae and their epibiota

Cited by 5 publications

References 93 publications

Parallel recolonizations generate distinct genomic sectors in kelp following high‐magnitude earthquake disturbance

Parallel recolonizations generate distinct genomic sectors in kelp following high‐magnitude earthquake disturbance

Genetic impacts of physical disturbance processes in coastal marine ecosystems

Integrating kelp genomic analyses and geological data to reveal ancient earthquake impacts

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