Phylogeography of sugar kelp: Northern ice‐age refugia in the Gulf of Alaska

Grant, W. Stewart; Chenoweth, Erica

doi:10.1002/ece3.7368

Cited by 7 publications

(5 citation statements)

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“…Higher allelic richness found further north in the Alaskan Kenai Peninsula, could have resulted from an earlier deglaciation (16,000 ybp) of this area when compared to Washington (14,000-13,000 ybp), allowing for an earlier range expansion north from the Prince of Wales Island and Haida Gwaii refugia (Mann and Hamilton, 1995). Based on molecular evidence, northern refugia for other kelp species have been recently proposed further north in the Gulf of Alaska Bay Grant and Chenoweth, 2021).…”

Section: Discussionmentioning

confidence: 99%

Range wide genetic differentiation in the bull kelp Nereocystis luetkeana with a seascape genetic focus on the Salish Sea

Gierke,

Coelho,

Khangaonkar

et al. 2023

Front. Mar. Sci.

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IntroductionIn temperate regions, one of the most critical determinants of present range-wide genetic diversity was the Pleistocene climate oscillations, the most recent one created by the last glacial maximum (LGM). This study aimed to describe N. luetkeana genetic structure across its entire range (Alaska to California) and test different models of population connectivity within the Salish Sea. This region was colonized after the LGM and has been under increased disturbance in recent decades.MethodsWe utilized microsatellite markers to study N. luetkeana genetic diversity at 53 sites across its range. Using higher sampling density in the Salish Sea, we employed a seascape genetics approach and tested isolation by hydrodynamic transport and environment models.ResultsAt the species distribution scale, we found four main groups of genetic co-ancestry, Alaska; Washington with Vancouver Island’s outer coast and Juan de Fuca Strait; Washington’s inner Salish Sea; and Oregon with California. The highest allelic richness (AR) levels were found in California, near the trailing range edge, although AR was also high in Alaska. The inner Salish Sea region had the poorest diversity across the species distribution. Nevertheless, a pattern of isolation by hydrodynamic transport and environment was supported in this region.DiscussionThe levels of allelic, private allele richness and genetic differentiation suggest that during the LGM, bull kelp had both northern and southern glacial refugia in the Prince of Wales Island-Haida Gwaii region and Central California, respectively. Genetic diversity in Northern California sites seems resilient to recent disturbances, whereas the low levels of genetic diversity in the inner Salish Sea are concerning.

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Section: Discussionmentioning

confidence: 99%

Range wide genetic differentiation in the bull kelp Nereocystis luetkeana with a seascape genetic focus on the Salish Sea

Gierke,

Coelho,

Khangaonkar

et al. 2023

Front. Mar. Sci.

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“…For instance, broad multilocus phylogeographic analyses (spanning 2800 km) of Alaskan (Pacific coast) Alaria showed high diversity among populations and departure from neutrality, suggesting the local persistence of populations during glaciations (Grant & Bringloe, 2020). Similarly, multilocus analyses of split kelp ( Hedophyllum nigripes ) and sugar kelp ( Saccharina latissimi ) support northern ice‐age refugia in the Gulf of Alaska (Grant et al, 2020; Grant & Chenoweth, 2021).…”

Section: Ancient Disturbances: High‐latitude Genetic Signature Of Gla...mentioning

confidence: 92%

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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“…Only one study compared samples across oceans, identifying four differentiated phylogroups -A) including specimens from Northwest (NW) Pacific (Japan, as S. coriacea), Northeast (NE) (British Columbia) Pacific and Greenland and Hudson Bay in NW Atlantic; B) NE Atlantic; C) NW Atlantic and D) samples from Russia previously identified as S. cichorioides (Neiva et al 2018). Together with recent findings on individuals in NE Pacific and Bering Sea (Grant and Chenoweth 2021), the hypothesis of a northern refugium during the Last Glacial Maximum for the species is gaining support, in contrast to the previous hypothesis of recolonisation from southern European populations, as it has been suggested for other seaweed species (Bringloe et al 2020).…”

Section: Population Differentiation At Genetic Levelmentioning

confidence: 96%

“…Population structure, genetic diversity and connectivity of populations of Saccharina latissima have been explored in recent years (Guzinski et al 2016(Guzinski et al , 2020Nielsen, Paulino, et al 2016;Luttikhuizen et al 2018;Mooney et al 2018;Neiva et al 2018;Grant and Chenoweth 2021). Overall, population differentiation, low within-genetic diversity, and low connectivity have been observed, although regional and local patterns can differ.…”

Section: Population Differentiation At Genetic Levelmentioning

confidence: 99%

The sugar kelp Saccharina latissima I: Recent advances in a changing climate

Diehl,

Li,

Scheschonk

et al. 2023

Preprint

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BackgroundThe sugar kelp Saccharina latissima is a Laminariales species widely distributed in the Northern Hemisphere. Its physiology and ecology have been studied since the 1960s, given its ecological relevance in western temperate coasts. However, research interest has recently been rising, driven mainly by reports of negative impacts of anthropogenically induced environmental change and by the increased commercial interest in cultivating the species with several industrial applications for the resulting biomass. • ScopeWe reviewed peer-review research articles, reports, doctoral theses, and book chapters that targeted Saccharina latissima published from 2009 to May 2023. We include earlier publications only in the few cases where some key knowledge has not been recently supported or contested. • ConclusionsThe comprehensive view of the ecology, physiology, biochemical and molecular biology of S. latissima given here can fuel our understanding of its survival in nature and finetuning of cultivation methods for several specific applications, promoting a sustainable resource. Recent developments in genomics, transcriptomics and epigenomics have contributed significantly to improving the understanding of genetic diversity and molecular mechanisms underlying plasticity and local adaptation. Due to its wide distribution, S. latissima has to cope with a large variability of different environmental conditions and possible interactions between drivers. Therefore, S. latissima has developed a variety of physiological and biochemical mechanisms to adjust to environmental changes. Survival, growth, photosynthetic performance, metabolism, and 3 enzymatic activity are strongly affected by abiotic conditions, such as temperature, salinity, nutrient conditions or ocean acidification. Massive alterations regarding abundance, depth distribution and seasonal growth patterns of S. latissima have been reported recently throughout its distribution range, likely in response to climate change. These biogeographic changes are expected to continue, and although much effort has been dedicated to studying S. latissima responses to environmental drivers, there are still large knowledge gaps. keywords: acclimation -biogeography -climate change -local adaptation -macroalgae -marine ecology -metabolites -molecular biology -omics -physiology -seaweedwarming How S. latissima adjusts to its environment has been extensively studied, although unbalanced among drivers and geographical regions (see Responses to environmental drivers). In seaweeds, biochemical compounds, including pigments, carbohydrates, antioxidants, lipids, fatty acids and proteins, vary in composition and concentration depending on environmental conditions (summarized in Amsler 2008; Wiencke and Bischof 2012; Hurd et al. 2014; Zhang and Thomsen 2019). Furthermore, biological interactions with other taxa have the potential to profoundly change S. latissima growth and survival and are summarized in Biotic interactions. In addition to seasonal effects or differences on larger globa...

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Phylogeography of sugar kelp: Northern ice‐age refugia in the Gulf of Alaska

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 7 publications

References 94 publications

Range wide genetic differentiation in the bull kelp Nereocystis luetkeana with a seascape genetic focus on the Salish Sea

Range wide genetic differentiation in the bull kelp Nereocystis luetkeana with a seascape genetic focus on the Salish Sea

Genetic impacts of physical disturbance processes in coastal marine ecosystems

The sugar kelp Saccharina latissima I: Recent advances in a changing climate

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