Phylogeography of the freshwater red alga <scp>S</scp>irodotia (<scp>B</scp>atrachospermales, <scp>R</scp>hodophyta) in <scp>B</scp>razil

Paiano, Monica O.; Necchi, Orlando

doi:10.1111/pre.12027

Cited by 9 publications

(4 citation statements)

References 27 publications

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“…Besides being suitable for species identification, delimitation, and discovery (Leliart et al 2014), this marker also has been used in phylogeographic studies on Rhodophyta from Brazil (e.g. Zuccarello & West 2002;Paiano & Necchi Jr 2013;2017a;b;Ayres-Ostrock et al 2019). The top second marker is the plastidial rbcL, which has been employed together with other markers such as the COI in systematic studies to resolve taxonomic issues (e.g.…”

Section: Discussionmentioning

confidence: 99%

A scientometric study of the molecular data on Brazilian red algae

et al. 2023

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The growth in the number of molecular sequences produced in recent years has provided valuable contributions to the knowledge diversity of red algae (Rhodophyta) in Brazil. However, many works indicate that there is still much to be studied. Here, we highlight the importance of compiling all these data to evidence possible taxonomic and geographic knowledge gaps in red algae through molecular data. So, this study presents a scientometric analysis of the molecular studies carried out on red algae in Brazil, based on the analysis of DNA sequences available in the public database GenBank. Our results demonstrated an increase in published papers from 1994 to 2020, corresponding to 165 studies analyzed. A huge disparity in the production of knowledge was observed, with the southeastern region concentrating the researchers responsible for most of the published studies, with emphasis on those in the University of São Paulo (USP). Bahia and São Paulo states stand out with the highest observed taxonomic richness, respectively. We also could identify the taxonomic groups with more molecular data generated, the sequence number deposited per institution since 1994, the main markers used, the regions that require a greater collection effort, and where the researchers who study red algae in the country are.

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Section: Discussionmentioning

confidence: 99%

A scientometric study of the molecular data on Brazilian red algae

et al. 2023

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“…Third, we determined the population structure of M . macrospora in South America and East Asia by reconstructing a haplotype network based on the intergenic spacer between the cytochrome oxidase subunit 2 and subunit 3 genes ( cox2 ‐ 3 ), which is a widely used marker to evaluate interpopulation genetic variation in freshwater red algae (Necchi & Vis, 2005; Paiano & Necchi, 2013, 2017). Fourth, we measured pH and nutrient level of freshwater bodies around Taiwan where M .…”

Section: Introductionmentioning

confidence: 99%

“…Second, to identify the main climatic components that differ between the alga's native range in South America and its non-native range in Taiwan, we compared the climates of the two geographic regions. Third, we determined the population structure of M. macrospora in South America and East Asia by reconstructing a haplotype network based on the intergenic spacer between the cytochrome oxidase subunit 2 and subunit 3 genes (cox2-3), which is a widely used marker to evaluate interpopulation genetic variation in freshwater red algae (Necchi & Vis, 2005;Paiano & Necchi, 2013, 2017. Fourth, we measured pH and nutrient level of freshwater bodies around Taiwan where M. macrospora has been found.…”

Section: Introductionmentioning

confidence: 99%

A multifaceted ecological assessment reveals the invasion of the freshwater red macroalga Montagnia macrospora (Batrachospermales, Rhodophyta) in Taiwan

Fontana

Yeh

Zhan

et al. 2022

Ecology and Evolution

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Invasive freshwater macroalgae are rarely described. Montagnia macrospora is a freshwater red alga introduced from South America to East Asia via the global aquarium trade. The earliest occurrence record of this alga in Taiwan is dated 2005. To determine whether M. macrospora has become invasive in Taiwan and to understand the traits that facilitated its invasion, we took a multifaceted approach that combines examination of ecological background and population genetic analysis. Our island‐wide survey showed that M. macrospora is widespread in the field across Taiwan, where the climate greatly differs from that of South America, and can self‐sustain for nearly a decade. Our population genetic analysis revealed a lack of genetic diversity of M. macrospora in Taiwan, consistent with the hypothesis that the alga expanded through asexual reproduction. Moreover, during our long‐term ecological assessments and field surveys, we observed that M. macrospora is an ecological generalist that can survive in a wide range of temperature, pH, illumination, and nutrient enrichment. Taken together, our data suggest that M. macrospora has successfully invaded the freshwater ecosystems of Taiwan, likely due to its ability to disperse asexually and to grow under broad environmental conditions. We hope that our study brings attention to invasive freshwater algae, which have been overlooked in conservation planning and management.

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“…The cytochrome oxidase genes (e.g., Paiano and Necchi 2013) rbcL (e.g., Boo et al 2023), andITS2 (e.g., Huanel et al 2020) are used in the red algal phylogeographic literature.…”

Section: Introductionmentioning

confidence: 99%

The phylogeographic history of Gracilaria transtasmanica in Australian and New Zealand.

Mitchell¹

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Often genetic disjunctions are present in populations separated by large distances, or even across relatively short distances in some cases. Natural barrier, such as currents, sheltered bays, andextensive bodies of water can hinder gene flow, creating genetic differentiation between populations. Many studies have addressed the interaction between geographical distribution and phylogenetic relationships and have identified common patterns that are associated with events such as expansion from glacial refugia and historical land bridges following glaciations. Bioregion boundaries are defined at locations where genetic breaks are commonly observed in species and these act as guides to future studies, suggesting potential locations to sample. Sometimes observed patterns are unique, not adhering to bioregions, revealing a fundamental difference in the gene flow of the species and its populations. This field of research is termed phylogeography and has been pivotal in combining macro and microevolutionary principles of population genetics and phylogenetics since its inception in 1987. The field has benefited from the advent of modern molecular tools, mostly from the improvement in DNA sequencing methods, allowing large amounts of sequence data to be used to provide information about haplotype frequency and diversity. Phylogeography has helped to reveal genetic patterns that would otherwise go unnoticed, such as the presence of cryptic species that are morphologically indistinguishable in the field, requiring genetics to discern. Gracilaria transtasmanica exists in Australia and New Zealand, yet only a single phylogeographic study has addressed the distribution of the species and exclusively in New Zealand. Using ITS2 and a new plastid marker, the present study expands on the knowledge of G. transtasmanica in New Zealand, and we incorporate Australian populations to compare the genetic diversity of the species in the two countries. The results from the ITS2 data indicate that the level of diversity in each country is comparable but with a distinct differentiation from one another, sharing no ribotypes. The plastid marker shows shared haplotypes but with little phylogeographic information beyond this. We also show that the distribution of G. transtasmanica is more continuous than previously shown, with populations all along the west coast of the North Island. We conclude that Australian and New Zealand populations have experienced isolation, that the origin of the species remains unclear, andthat the last glacial maximum is likely to have impacted the contemporary genetic patterns in each country.

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Phylogeography of the freshwater red alga Sirodotia (Batrachospermales, Rhodophyta) in Brazil

Cited by 9 publications

References 27 publications

A scientometric study of the molecular data on Brazilian red algae

A scientometric study of the molecular data on Brazilian red algae

A multifaceted ecological assessment reveals the invasion of the freshwater red macroalga Montagnia macrospora (Batrachospermales, Rhodophyta) in Taiwan

The phylogeographic history of Gracilaria transtasmanica in Australian and New Zealand.

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