Brewed in the African pot: the phylogeography of the toothed barnacle
            <i>Chthamalus dentatus</i>
            (Chthamaloidea: Chthamalidae)

Motro, Uzi; Simon‐Blecher, Noa; Frumin, Suembikya; Achituv, Y.

doi:10.1080/17451000.2023.2193899

Cited by 3 publications

(1 citation statement)

References 39 publications

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“…First, indigenous barnacles are generally scarce on the west coast of South Africa (Boland, 1997). In particular, there is a large gap in distribution of the native high-shore Chthamalus dentatus between Namibia and the south coast of South Africa (with genetic differences between the two populations of C. dentatus suggesting they are separate species; Motro et al, 2023). This gap is now filled by B. glandula.…”

Section: Barnacles Limpets and Periwinklesmentioning

confidence: 99%

Complex interplays between limpets and alien species in South Africa: multispecies interactions, zonation and size effects

et al. 2023

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Integrating observations and experiments, we address the progressive effects of three alien species, the mussels Mytilus galloprovincialis and Semimytilus patagonicus, and the barnacle Balanus glandula, on limpet species in South Africa. We describe four aspects: (1) Interactions among algae, the limpet Scutellastra granularis and M. galloprovincialis. (2) The influences of B. glandula on S. granularis and on the periwinkle Afrolittorina knysnaensis. (3) Transformation of the zonation of S. granularis by the successive arrival of these three aliens. (4) Assessment of how effective the published predictors of the effects of M. galloprovincialis have been when applied to S. patagonicus. We conclude: (a) Scutellastra granularis improves mussel survival and condition by regulating algae that would otherwise overgrow and smother the mussels. (b) Balanus glandula has largely occupied the upper half of rocky shores, and at high densities depletes or eliminates suitable bare-rock habitat for S. granularis. However, it has positive effects on another gastropod, A. knysnaensis. (c) Mytilus galloprovincialis dominates the midshore and has positive effects on the recruitment of S. granularis, but negatively influences adults of this limpet, so that its size composition, density, reproductive output and zonation are all altered by this mussel. (d) Semimytilus patagonicus presents different challenges to those created by M. galloprovincialis, settling at much greater densities, lower down the shore, and reaching smaller maximum sizes. Rather than generating a favourable habitat for epizootic S. granularis recruits and juveniles, it almost completely excludes that limpet. We conclude that the influences of alien species are not readily predictable, depending on the nature of the invader and recipient species, environmental conditions and complex interactions among species. Collectively, the three alien species now cover almost all zones on wave-exposed rocky shores, completing the ‘zonation squeeze’ on limpets, but are less influential on wave-sheltered shores and in years when recruitment is low.

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Section: Barnacles Limpets and Periwinklesmentioning

confidence: 99%

Complex interplays between limpets and alien species in South Africa: multispecies interactions, zonation and size effects

et al. 2023

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The African cryptic clades of the toothed barnacle Chthamalus dentatus (Chthamaloidea, Chthamalidae)

Tikochinski,

Bronstein,

Motro

et al. 2024

Marine Biology Research

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Molecular analysis separates the Atlantic population of Montagu's stellate barnacle into two cryptic species

et al. 2023

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The distribution of the intertidal barnacle Chthamalus montagui spans the West Mediterranean Sea and the Northeast Atlantic shores of Europe and West Africa. Knowledge of the phylogeography of this species has been limited to the Mediterranean and the European shores of the Atlantic. The present study considers the populations of West Europe, but also focuses on the overlooked populations of West Africa. We performed a molecular analysis using two markers: the mitochondrial COI gene and the nuclear rRNA ITS gene. Whereas ITS proved to be non‐informative, COI has demonstrated that the East Atlantic population of C. montagui comprises two genetically distinct clades: a northern clade that ranges from Mauritania to Scotland and a southern clade that comprises the populations from Senegal. These clades are separated by the Cape Verde Front, which stretches west of the upwelling area off Mauritania. We consider these clades as two cryptic species of the nominal species C. montagui.

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Brewed in the African pot: the phylogeography of the toothed barnacle Chthamalus dentatus (Chthamaloidea: Chthamalidae)

Cited by 3 publications

References 39 publications

Complex interplays between limpets and alien species in South Africa: multispecies interactions, zonation and size effects

Complex interplays between limpets and alien species in South Africa: multispecies interactions, zonation and size effects

The African cryptic clades of the toothed barnacle Chthamalus dentatus (Chthamaloidea, Chthamalidae)

Molecular analysis separates the Atlantic population of Montagu's stellate barnacle into two cryptic species

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