Phylogeography of two intertidal seaweeds, Gelidium lingulatum and G. rex (Rhodophyta: Gelidiales), along the South East Pacific: patterns explained by rafting dispersal?

López, Boris A.; Tellier, Florence; Retamal-Alarcón, Juan C.; Pérez-Araneda, Karla; Fierro, Ariel O.; Macaya, Erasmo C.; Tala, Fadia; Thiel, Martín

doi:10.1007/s00227-017-3219-5

Cited by 24 publications

(17 citation statements)

References 108 publications

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“…, López et al. , ), which could contribute to dispersal after genetic differentiation influenced its genetic structure.…”

Section: Discussionmentioning

confidence: 99%

“…As for Ophidocladus simpliciusculus, Lophosiphonia obscura and P. villum, dispersal mechanisms for S. spinifera and P. devoniensis are unknown. In contrast, S. dendroidea has been reported growing on stranded holdfasts of the floating alga Durvillaea antarctica (Macaya et al 2016(Macaya et al , L opez et al 2017(Macaya et al , 2018, which could contribute to dispersal after genetic differentiation influenced its genetic structure. 836 PILAR D IAZ-TAPIA ET AL.…”

Section: Herposiphonia Tenella Ip2 Mg975657 Spmentioning

confidence: 96%

“…The dispersal ability of seaweeds is generally very limited, of the order of tens of meters or less (Santelices 1990, Kinlan and Gaines 2003, Destombe et al 2009). However, long-distance dispersal is known in brown seaweeds with buoyant structures (Fraser et al 2009, Macaya andZuccarello 2010), which can act as rafts promoting in turn the dispersal of the epiphytic species that they host , Macaya et al 2016, L opez et al 2017. Still, a large proportion of macroalgae are epilithic, so their expected dispersal ability is very limited and consequently their distribution range is expected to be relatively small.…”

Section: School Of Biosciences University Of Melbourne Melbourne Vmentioning

confidence: 99%

“…, López et al. , ). Still, a large proportion of macroalgae are epilithic, so their expected dispersal ability is very limited and consequently their distribution range is expected to be relatively small.…”

mentioning

confidence: 96%

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Widely distributed red algae often represent hidden introductions, complexes of cryptic species or species with strong phylogeographic structure

Díaz‐Tapia

Maggs

Macaya

et al. 2018

Journal of Phycology

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Despite studies suggesting that most seaweeds are poor dispersers, many red algal species are reported to have circumglobal distributions. Such distributions have mostly been based on morphological identifications, but molecular data have revealed a range of issues with morphologically defined species boundaries. Consequently, the real distribution of such reportedly circumglobal species must be questioned. In this study, we analyzed molecular data sets (rbcL gene) of nine species in the Rhodomelaceae for which samples were available from widely spaced geographical locations. Three overall patterns were identified: (i) species showing strong phylogeographic structure (i.e., phylogenetic similarity correlates with geographical provenance), often to the point that populations from different locations could be considered as different species (Lophosiphonia obscura, Ophidocladus simpliciusculus, Polysiphonia villum, and Xiphosiphonia pinnulata); (ii) species with a broad distribution that is explained, in part, by putative human-mediated transport (Symphyocladia dendroidea and Polysiphonia devoniensis); and (iii) non-monophyletic complexes of cryptic species, most with a more restricted distribution than previously thought (Herposiphonia tenella, Symphyocladia dendroidea, and the Xiphosiphonia pennata complex that includes the species Xiphosiphonia pinnulata and Symphyocladia spinifera). This study shows that widely distributed species are the exception in marine red algae, unless they have been spread by humans.

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“…, López et al. , ), which could contribute to dispersal after genetic differentiation influenced its genetic structure.…”

Section: Discussionmentioning

confidence: 99%

Section: Herposiphonia Tenella Ip2 Mg975657 Spmentioning

confidence: 96%

Section: School Of Biosciences University Of Melbourne Melbourne Vmentioning

confidence: 99%

mentioning

confidence: 96%

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Widely distributed red algae often represent hidden introductions, complexes of cryptic species or species with strong phylogeographic structure

Díaz‐Tapia

Maggs

Macaya

et al. 2018

Journal of Phycology

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“…3) may be attributable to passive dispersal mechanisms (see also Haye et al 2012). Likewise, a recent study on the red seaweed Gelidium lingulatum, which is frequently found growing in D. antarctica holdfasts, showed that some haplotypes were common in southern as well in northern localities (López et al 2017b).…”

Section: Genetic Trends For Maulliniamentioning

confidence: 96%

Gall-forming protistan parasites infect southern bull kelp across the Southern Ocean, with prevalence increasing to the south

Blake¹,

Thiel²,

López³

et al. 2017

Mar. Ecol. Prog. Ser.

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At the mercy of the winds: The seasonal dynamics of floating and stranded seaweeds at mid‐latitudes

Rothäusler

Hinojosa

Moraga

et al. 2021

Limnology & Oceanography

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Many seaweed species are particularly important for passive marine dispersal, yet relatively little is known about their floating and stranding dynamics. Here, we studied these dynamics for two kelp species over four consecutive years at mid‐latitudes (30°S). Floating kelps were found during all seasons, but Macrocystis pyrifera was always more abundant than Durvillaea incurvata. Highest floating biomasses were reached during summer and fall, whereas considerable stranded biomasses on nearby shores were only observed during summer. The proportion of fragments among the floating kelps was high throughout the entire study period and highest for M. pyrifera during summer. At the same time, blades of M. pyrifera that floated in nearshore waters in summer had a high blade index and thus were intact (i.e., not yet compromised by unfavorable environmental conditions). These results suggest that during summer, floating kelps become quickly resupplied from benthic sources, which compensates their frequent losses due to degradation and stranding. During fall, biomasses of floating kelps remain high because of reduced losses. Interestingly, increased wind speed was a good predictor for the biomass accumulations of the two kelp species, although the floating biomass of M. pyrifera was additionally influenced by oceanographic fronts. Our findings suggest that at mid‐latitudes the dynamics of floating seaweed stocks are dependent on the availability of benthic source populations (continuous throughout the year) and export due to degradation (high in summer/fall) and stranding (high in summer).

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Phylogeography of two intertidal seaweeds, Gelidium lingulatum and G. rex (Rhodophyta: Gelidiales), along the South East Pacific: patterns explained by rafting dispersal?

Cited by 24 publications

References 108 publications

Widely distributed red algae often represent hidden introductions, complexes of cryptic species or species with strong phylogeographic structure

Widely distributed red algae often represent hidden introductions, complexes of cryptic species or species with strong phylogeographic structure

Gall-forming protistan parasites infect southern bull kelp across the Southern Ocean, with prevalence increasing to the south

At the mercy of the winds: The seasonal dynamics of floating and stranded seaweeds at mid‐latitudes

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