Phylogeography of two species of Lysidice (Polychaeta, Eunicidae) associated to the seagrass Posidonia oceanica in the Mediterranean Sea

Iannotta, Maria Alessandra; Patti, Francesco Paolo; Ambrosino, Mariela Lis; Procaccini, Gabriele; Gambi, María Cristina

doi:10.1007/s00227-006-0405-2

Cited by 25 publications

(24 citation statements)

References 30 publications

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“…Considering the reproductive biology of L. ninetta in populations inhabiting Posidonia meadows, the species shows features that indicate reproduction by schizogamy (Gambi & Cigliano 2006) and that are consistent with a possible planktotrophic development of the larvae. Previous genetic results based on both mitochondrial (COI) and nuclear (ITS1) data show that L. ninetta is clearly separated from its cogener L. collaris and also show high intraspecific differentiation, particularly at some sampling sites, suggesting the presence of sibling species (Iannotta et al 2007). In the present work, a third molecular marker (16S rRNA) has been used to analyse 6 populations from the Mediterranean basin.…”

Section: Introductionmentioning

confidence: 80%

“…The Atlantic origin and a previous study on the phylogeographic distribution of Lysidice ninetta (Iannotta et al 2007) have already suggested a west to east expansion of the species in the Mediterranean basin after the Messinian evaporation and salinity crisis (~5.5 million years ago). The genetic similarity among the sequences of the dark individuals analysed in the present work and those of L. ninetta reported in the literature (GenBank Accession Number AY838834) and collected in the Atlantic Ocean near the type locality (Struck et al 2006) support the hypothesis of the introduction of the target species through the Strait of Gibraltar.…”

Section: Population Genetic Analysesmentioning

confidence: 86%

“…1a). Previous data on the phylogeographic distribution of L. ninetta, obtained using both nuclear and mitochondrial markers (ITS1 and COI), have already provided evidence of the presence of 2 main clades for this species, but the Otranto individuals were genetically dispersed between the 2 groups using the nuclear marker, whereas, using the mitochondrial marker, they were all harboured in the clade characterising the populations of the eastern Mediterranean basin (Iannotta et al 2007). The genetically contrasting results and the few data available on the larval development of L. ninetta (pelagic larval stage, but with limited dispersal) could lead to the hypothesis that the presence of hybrids in the Otranto population is due to the species living in a geographical mixing zone where it is common to find processes of hybridization (Arnold 1997).…”

Section: Population Genetic Analysesmentioning

confidence: 90%

“…At one of these study sites, located off Ischia (Cava dell'Isola, Tyrrhenian Sea, Naples, Italy) ( Fig. 1, Table 1), the 2 possible sibling species cooccurred (Iannotta et al 2007). Therefore, we selected this site for additional sampling and also to obtain specimens for the preliminary morphological analyses.…”

Section: Methodsmentioning

confidence: 99%

“…In addition, despite the high diversity of species within the Eunicidae, few data on the reproductive habits of this clade are available, mainly for several species belonging to the genera Palola, Eunice and Marphysa (Wilson 1991, Giangrande 1997 and, only recently, the Lysidice (Gambi & Cigliano 2006). In the Mediterranean Sea, L. ninetta -a warmtemperate and temperate water polychaete (George & Hartmann-Schröder 1985, Cantone 1993) -and its cogener L. collaris -a tropical species and a putative migrant from the Red Sea via the Suez canal (BenEliahu 1972) -are clearly distinguished by both morphological (Martin 1987) and molecular data (Iannotta et al 2007). The larvae of L. ninetta can be designated as Type 1, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Molecular evidence of intraspecific variability in Lysidice ninetta (Polychaeta: Eunicidae) in the Mediterranean Sea

Iannotta¹,

Gambi²,

Patti³

2009

Aquat. Biol.

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A first study of the phylogeography of the polychaete Lysidice ninetta Audouin & MilneEdwards (Polychaeta: Eunicidae) in the Mediterranean Sea, based on analyses of the molecular markers ITS1 and COI, indicated the occurrence of strong intraspecific variability and possible sibling species. Here, we report further evidence of the presence of sibling species within L. ninetta, revealed by analysing a new molecular marker (16S rRNA) and supported by preliminary morphological observations. Specimens were collected in association with the seagrass Posidonia oceanica in 6 meadows of the Mediterranean basin; in one of the meadows in which putative siblings co-occurred (Cava meadow off the island of Ischia, Naples, Italy), additional samples were collected for genetic and morphological analysis. The mitochondrial region 16S rRNA of 78 specimens revealed 2 haplotypes (nA and nB); morphological characters, associated with these 2 molecular clades were also observed in a sub-set of the analysed specimens of L. ninetta, revealing the presence of 2 morphotypes. The morphotype termed 'dark', characterised by a typical dark colour pattern on the prostomium and first anterior segments, as well as by black aciculae all along the examined body portion, matching quite well with the description of L. ninetta from the Atlantic type locality, corresponded to haplotype nA. The morphotype termed 'light', with lighter colouration of the prostomium and first anterior segments, and both black and yellow aciculae on the examined body portion, corresponded to haplotype nB, suggesting the existence of a different species. The hypotheses that can be addressed are the following: (1) only a single new species (the light morph/genotype) is present, while the dark morph corresponds to the original L. ninetta species; (2) both morphs/genotypes (dark and light) are new taxa and need to be fully and properly described; and (3) one or both of the species corresponds to previously described species, synonymised by previous authors as L. ninetta. In all cases there is an urgent need for revision of the genus Lysidice and the nominal species in the Mediterranean Sea basin. This is a complex task far beyond the scope of this work.

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Section: Introductionmentioning

confidence: 80%

Section: Population Genetic Analysesmentioning

confidence: 86%

Section: Population Genetic Analysesmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Molecular evidence of intraspecific variability in Lysidice ninetta (Polychaeta: Eunicidae) in the Mediterranean Sea

Iannotta¹,

Gambi²,

Patti³

2009

Aquat. Biol.

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Patterns of genetic variation of a Lessepsian parasite

et al. 2012

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Genetic studies of Lessepsian species often demonstrate the absence of a genetic bottleneck in a wide plethora of taxa, from plants to fish, but information regarding the genetic responses of their parasites in the newly colonized ecosystems is still lacking. This study compared genetic diversity of Red Sea (Eilat, Nabq), Suez canal (Ismailia) and Mediterranean (Rhodes, Tel Aviv) populations of the Monogenoidea Glyphidohaptor plectocirra by sequencing a portion of the mitochondrial CoxI gene. Despite evidence of a slight decrease in the genetic diversity of Mediterranean populations, a simulation analysis based on coalescent theory demonstrated the absence of significant bottlenecks, but there was directional selection along a cline moving further from the Suez canal. The absence of bottlenecks was congruent with that described for G. plectocirra hosts Siganus rivulatus and Siganus luridus, and reflected a common history of high propagule pressure during initial colonization, and constant or repeated gene flow from the Red Sea to the Mediterranean area. However, directional selection was peculiar to the parasites and likely originated from parasite genotype 9 environment interactions. Finally, an anisotropic contribution of Red Sea populations to the Lessepsian invasion was demonstrated.

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Non-indigenous macrozoobenthic species on hard substrata of selected harbours in the Adriatic Sea

Spagnolo

Auriemma

Bacci

et al. 2019

Marine Pollution Bulletin

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The intense shipping traffic characterising the Adriatic Sea favours the spread of marine organisms. Yet, a study of 12 Adriatic ports (4 on the western side and 8 on the eastern side of the basin) found that non-indigenous species (NIS) accounted for only 4% of the benthic communities settled on hard substrates. The cirripeds Amphibalanus amphitrite and Balanus trigonus, found in 8 harbours, were the most common invaders followed by Amphibalanus eburneus, the ascidian Styela plicata, and the bivalve Magallana gigas. The highest percentage of NIS was recorded in Venice and Ploče, the harbours with the least rich native communities; the lowest percentage was retrieved in Trieste, Koper, Pula, and Rijeka, the harbours hosting the highest species diversity. In contrast, the ports of Bari and Ancona showed both high NIS percentages and highly diversified communities.

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Phylogeography of two species of Lysidice (Polychaeta, Eunicidae) associated to the seagrass Posidonia oceanica in the Mediterranean Sea

Cited by 25 publications

References 30 publications

Molecular evidence of intraspecific variability in Lysidice ninetta (Polychaeta: Eunicidae) in the Mediterranean Sea

Molecular evidence of intraspecific variability in Lysidice ninetta (Polychaeta: Eunicidae) in the Mediterranean Sea

Patterns of genetic variation of a Lessepsian parasite

Non-indigenous macrozoobenthic species on hard substrata of selected harbours in the Adriatic Sea

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