A phylogeographic investigation of the kelp genus<i>Laminaria</i>(Laminariales, Phaeophyceae), with emphasis on the South Atlantic Ocean

Rothman, Mark D.; Mattio, Lydiane; Bolton, John J.

doi:10.1111/jpy.12544

Cited by 35 publications

(28 citation statements)

References 64 publications

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“…Estes and Steinberg () proposed that the success of kelps in the North Pacific was the consequence of a trophic cascade, in which sea otters ( Enhydra lutris ) feed on herbivorous sea urchins (Strongylocentrotidae) and therefore remove a potential limitation on kelp growth rates and population sizes. Sea otters, however, arrived in the North Pacific during or even after the Pliocene, well after sea urchins made their appearance in) the Middle Miocene and even longer after the likely time of origin of kelps during the Oligocene or Early Miocene in the North Pacific (Domning, ; Rothman, Mattio, Anderson, & Bolton, ; Vermeij, ). We suspect that the mechanism proposed by Estes and Steinberg () is responsible for the success of kelps, but their timing and culprits are earlier and different.…”

Section: Productivitymentioning

confidence: 99%

The coastal North Pacific: Origins and history of a dominant marine biota

Vermeij

Banker

Capece

et al. 2018

Journal of Biogeography

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Aims Some biogeographical regions act primarily as donors of colonists to other regions, while others act predominantly as recipient areas. How some biotas become dominant while others do not is a largely historical question that has received surprisingly little attention from biogeographers. Here, we seek to answer this question for the cold‐water North Pacific biota, which did not exist forty million years ago but which is now the principal donor biota outside the tropics. Location We focus on the cool‐temperate coastal North Pacific Ocean over the last 36.5 million years. Taxon We consider all multicellular taxa for which adequate fossil, phylogenetic and biogeographical data exist. Methods After placing North Pacific geographical events in the broader context of ocean gateways opening and closing elsewhere in the world, we discuss the history and factors affecting the planktonic and benthic productivity in the North Pacific based on a review and critical evaluation of the literature. A synthesis of primary sources was used to evaluate the origins and fates of North Pacific lineages, with special emphasis on movements to, within and from the North Pacific during the Cenozoic era. Results During the Late Eocene to earliest Miocene, the cooling North Pacific received colonists from adjacent warm‐water regions and the cold Southern Hemisphere, where temperate conditions had existed since at least the Cretaceous. From the Miocene onward, the North Pacific biota began to spread to the Southern Hemisphere and through Bering Strait to the Arctic and North Atlantic Oceans. Within the North Pacific, lineages during the early cooling phases spread predominantly from west to east, but in the Early Middle Miocene this pattern reversed, with later expansions going in both directions. An increase in productivity, powered by the evolution of highly productive seaweeds and by consumers with high metabolic rates, accompanied the transformation of the North Pacific from a recipient to donor biota. Main conclusions The North Pacific replaced the Southern Hemisphere temperate biota as the principal donor biota during the Miocene through a combination of increasing productivity, low magnitudes of extinction and intense competition and predation in an ocean basin with a long coastline.

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Section: Productivitymentioning

confidence: 99%

The coastal North Pacific: Origins and history of a dominant marine biota

Vermeij

Banker

Capece

et al. 2018

Journal of Biogeography

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“…An exception is bull kelp that is classified as a fucoid. Taxonomic understanding of both groups remains incomplete and in need of further refinement (reviews Hartog and den Kuo, 2006;Bartsch et al, 2008;Bolton, 2010), despite recent advances (Lane et al, 2006;Aires et al, 2011;Coyer et al, 2013;Rothman et al, 2015Rothman et al, , 2017Jackson et al, 2017). The continued application of genome-wide markers and multigene phylogenies will likely reveal previously overlooked taxonomic and biogeographic lineages (e.g., Tellier et al, 2009Tellier et al, , 2011.…”

Section: Climate Change Impact On Marine Macrophytesmentioning

confidence: 99%

Climate Change Impacts on Seagrass Meadows and Macroalgal Forests: An Integrative Perspective on Acclimation and Adaptation Potential

et al. 2018

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Marine macrophytes are the foundation of algal forests and seagrass meadows-some of the most productive and diverse coastal marine ecosystems on the planet. These ecosystems provide nursery grounds and food for fish and invertebrates, coastline protection from erosion, carbon sequestration, and nutrient fixation. For marine macrophytes, temperature is generally the most important range limiting factor, and ocean warming is considered the most severe threat among global climate change factors. Ocean warming induced losses of dominant macrophytes along their equatorial range edges, as well as range extensions into polar regions, are predicted and already documented. While adaptive evolution based on genetic change is considered too slow to keep pace with the increasing rate of anthropogenic environmental changes, rapid adaptation may come about through a set of non-genetic mechanisms involving the functional composition of the associated microbiome, as well as epigenetic modification of the genome and its regulatory effect on gene expression and the activity of transposable elements. While research in terrestrial plants demonstrates that the integration of non-genetic mechanisms provide a more holistic picture of a species' evolutionary potential, research in marine systems is lagging behind. Here, we aim to review the potential of marine macrophytes to acclimatize and adapt to major climate change effects via intraspecific variation at the genetic, epigenetic, and microbiome levels. All three levels create phenotypic variation that may either enhance fitness within individuals (plasticity) or be subject to selection and ultimately, adaptation. We

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“…Species of Porphyra in Greenland ally closely with species in the North Pacific (Mols‐Mortensen, Neefus, Pedersen, & Brodie, ), while Laminaria spp. are hypothesized to have migrated into the Atlantic twice since the opening of the Bering Strait (Rothman, Mattio, Anderson, & Bolton, ). The above speciation scenarios are further supported by thermogeographical modelling that indicates a strong pacific to atlantic connection exists in marine macroalgae, which played a critical role in the establishment of the arctic and north atlantic flora during the Pleistocene (Adey & Hayek, ; Adey, Lindstrom, Hommersand, & Müller, ).…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, the opening of the Bering Strait is used as a calibration point for the atlantic clade (excluding Laminaria solidungula J.Agardh) in the Rothman et al. () study on Laminaria (although time points calibrated using fossil evidence are also used). An independently calibrated molecular clock testing divergence time estimates in trans‐arctic lineages is needed to assess whether these events occurred after the opening of the Bering Strait, and if these events took place during glaciation.…”

Section: Introductionmentioning

confidence: 99%

Trans‐Arctic speciation of Florideophyceae (Rhodophyta) since the opening of the Bering Strait, with consideration of the “species pump” hypothesis

Bringloe

Saunders

2019

Journal of Biogeography

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Aim The opening of the Bering Strait initiated significant biotic interchange that is postulated to have played a major role in phylogeographical patterns of northern marine flora and fauna. In addition, the “species pump” hypothesis asserts that glaciation events promoted speciation due to repeated isolation of populations over the past 2.6 million years. Here, trans‐Arctic speciation events in red marine macroalgae (Florideophyceae) were assessed using time‐calibrated phylogenies, and the applicability of the “species pump” hypothesis was considered. Location Species records and sequence data for trans‐arctic genera of marine macroalgae were amalgamated and supplemented with sampling from the Northwest Atlantic, Northern Alaska (Beaufort Sea), Norway, and Nome, Alaska (Bering Sea; 2014–2017). Methods Bayesian and maximum likelihood phylogenies were variously built using the 5′ end of the cytochrome c oxidase subunit I gene (COI‐5P), and/or the full‐length nuclear internal transcribed spacer region (ITS), and/or the ribulose‐1 5‐biphosphate carboxylase large subunit gene (rbcL), and nodes were timed using calibrated COI‐5P and rbcL molecular clocks. The final dataset represented approximately 184 species, broadly representing 14 trans‐arctic lineages. Results Pacific to Atlantic migration and subsequent speciation was inferred in 11 cases, whereas the opposite scenario, atlantic to pacific, was inferred once; only three speciation events appeared to occur during the Pleistocene. Main conclusions Our results are in agreement with previous studies in that trans‐arctic speciation events postdated the opening of the Bering Strait with a clear pacific to atlantic bias. Evidence for the “species pump” (as applied to trans‐arctic interchange) was lacking given the frequency of trans‐arctic speciation events was not amplified during the Pleistocene.

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A phylogeographic investigation of the kelp genusLaminaria(Laminariales, Phaeophyceae), with emphasis on the South Atlantic Ocean

Cited by 35 publications

References 64 publications

The coastal North Pacific: Origins and history of a dominant marine biota

The coastal North Pacific: Origins and history of a dominant marine biota

Climate Change Impacts on Seagrass Meadows and Macroalgal Forests: An Integrative Perspective on Acclimation and Adaptation Potential

Trans‐Arctic speciation of Florideophyceae (Rhodophyta) since the opening of the Bering Strait, with consideration of the “species pump” hypothesis

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