The genera<i>Melanothamnus</i>Bornet &amp; Falkenberg and<i>Vertebrata</i>S.F. Gray constitute well-defined clades of the red algal tribe Polysiphonieae (Rhodomelaceae, Ceramiales)

Díaz‐Tapia, Pilar; McIvor, Lynne; Freshwater, D. Wilson; Verbruggen, Heroen; Wynne, Michael J.; Maggs, Christine A.

doi:10.1080/09670262.2016.1256436

Cited by 43 publications

(41 citation statements)

References 71 publications

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“…and two varieties of P. scopulorum. Díaz-Tapia et al (2017) documented two clades Polysiphonia sensu stricto 1 and 2 that resolved as separate lineages in rbcL analyses but together formed a robust clade in 18S analyses. Relative to their analyses (Díaz-Tapia et al 2017, fig.…”

Section: Discussionmentioning

confidence: 99%

“…Díaz-Tapia et al (2017) documented two clades Polysiphonia sensu stricto 1 and 2 that resolved as separate lineages in rbcL analyses but together formed a robust clade in 18S analyses. Relative to their analyses (Díaz-Tapia et al 2017, fig. 1), P. scopulorum resolves in Polysiphonia sensu stricto 2, whereas the generitype (P. stricta) occurs in Polysiphonia sensu stricto 1.…”

Section: Discussionmentioning

confidence: 99%

“…The GenBank sequence (JX828149) of P. caespitosa was derived from a specimen from Spain originally attributed to P. scopulorum, but referred to P. caespitosa by . In Díaz-Tapia et al (2017, fig. 1), JX828149 is attributed (possibly in error) to P. scopulorum.…”

Section: Discussionmentioning

confidence: 99%

“…Recent studies based on morphological and/or molecular analyses have proposed the recognition of several segregate genera (e.g., Kim & Lee 1999;Choi et al 2001;Díaz-Tapia et al 2017), but the taxonomy of Polysiphonia sensu lato is seemingly far from settled and further work is needed to clarify the relationships of the included species. Studies are often hampered by uncertainty regarding species discrimination based on morphological analysis alone, which can be a difficult task due to the phenotypic plasticity of specimens (Kim et al 2000).…”

Section: Introductionmentioning

confidence: 99%

“…These studies have highlighted the need for the characterization of species based on specimens collected from the type locality, to enable a critical reassessment of species delimitation using molecular-assisted alpha taxonomy (Mamoozadeh & Freshwater 2012). Recent studies using molecular markers and phylogenetic reconstruction with genetic distance for species identification have provided further clarification of relationships within the genus (Geoffroy et al 2016;Díaz-Tapia et al 2017). Rapid molecular methods to delimit species have been used to circumvent the difficulties of morphology-based identification .…”

Section: Introductionmentioning

confidence: 99%

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The phylogenetic position of Polysiphonia scopulorum (Rhodomelaceae, Rhodophyta) based on molecular analyses and morphological observations of specimens from the type locality in Western Australia

Huisman

Kim

2017

Phytotaxa

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Considerable uncertainty surrounds the phylogenetic position of Polysiphonia scopulorum, a species with an apparently cosmopolitan distribution. Here we report, for the first time, molecular phylogenetic analyses using plastid rbcL gene sequences and morphological observations of P. scopulorum collected from the type locality, Rottnest Island in Western Australia. Morphological characteristics of the Rottnest Island specimens allowed unequivocal identification, however, the sequence analyses uncovered discrepancies in previous molecular studies that included specimens identified as P. scopulorum from other locations. The phylogenetic evidence clearly revealed that P. scopulorum from Rottnest Island formed a sister clade with P. caespitosa from Spain (JX828149 as P. scopulorum) with moderate support, but that it differed from specimens identified as P. scopulorum from the U.S.A. (AY396039, EU492915). In light of this, we suggest that P. scopulorum be considered an endemic species with a distribution restricted to Australia. Our results showed the existence of several distinct clades among the species of Polysiphonia sensu lato, including the clade containing P. scopulorum which did not join with the generitype Polysiphonia stricta (i.e., Polysiphonia sensu stricto). This suggests that the P. scopulorum clade might represent a separate genus, however, further studies including multi-gene analyses are recommended before recognizing any segregate taxa.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The phylogenetic position of Polysiphonia scopulorum (Rhodomelaceae, Rhodophyta) based on molecular analyses and morphological observations of specimens from the type locality in Western Australia

Huisman

Kim

2017

Phytotaxa

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Taxonomic reassessment of Polysiphonia hainanensis (Rhodomelaceae, Rhodophyta) based on molecular and morphological analyses

Tan

Liu

2020

J. Ocean. Limnol.

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Red List for British seaweeds: evaluating the IUCN methodology for non-standard marine organisms

et al. 2023

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The IUCN Red List of Threatened Species is an authoritative tool in biodiversity conservation. Whilst IUCN criteria have been applied successfully to groups such as birds and mammals, a Red List assessment of British seaweeds in 2021 revealed that the categories to which seaweed species were assigned were dependent on how the criteria were applied. Here, this seaweed assessment is used as a case study with which to evaluate the IUCN methodology for use with ‘non-standard’ groups of organisms. A data-driven assessment of red (Rhodophyta), green (Chlorophyta) and brown (Phaeophyceae) seaweeds, which applied three (A, B and D) of the five IUCN criteria (A–E), categorized 13% of 617 British species as threatened. Following peer review, only 7% of species were categorized as threatened (1% Critically Endangered—CR, 3% Endangered—EN, 3% Vulnerable—VU), and 55% as Data Deficient. This reduction in species categorized as threatened suggests that strict application of the IUCN criteria may, at least for the seaweeds, over-estimate threat. As a result of this assessment, recommendations include the need for a more unified monitoring system and a review of the suitability for/application of the IUCN assessment criteria to some types of organisms. For example, in clonal populations, it is not possible to count individuals, and complex life histories cause additional complications. IUCN criteria must be applicable to a wide range of organisms, including seaweeds.

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The generaMelanothamnusBornet & Falkenberg andVertebrataS.F. Gray constitute well-defined clades of the red algal tribe Polysiphonieae (Rhodomelaceae, Ceramiales)

Cited by 43 publications

References 71 publications

The phylogenetic position of Polysiphonia scopulorum (Rhodomelaceae, Rhodophyta) based on molecular analyses and morphological observations of specimens from the type locality in Western Australia

The phylogenetic position of Polysiphonia scopulorum (Rhodomelaceae, Rhodophyta) based on molecular analyses and morphological observations of specimens from the type locality in Western Australia

Taxonomic reassessment of Polysiphonia hainanensis (Rhodomelaceae, Rhodophyta) based on molecular and morphological analyses

Red List for British seaweeds: evaluating the IUCN methodology for non-standard marine organisms

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