Dispersal of land snails by sea storms

Ożgo, Małgorzata; Örstan, Aydın; Kirschenstein, Małgorzata; Cameron, R. A.

doi:10.1093/mollus/eyv060

Cited by 24 publications

(7 citation statements)

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“…Subclades 4-6 from clade F appear to have migrated from south to north, because the ancestral lineages tend to be distributed in the areas of lower lati- Figure 5). In general, the salt tolerance of terrestrial molluscs is poor (Machin, 1975), but prior studies since Darwin (1859) testing the salt tolerance of land snails (Aucapitaine, 1864;Holland & Cowie, 2007;Mayr & Rosen, 1956) Örstan, Kirschenstein, & Cameron, 2016). Clades D and F inhabited both coastal and inland areas and we found some individuals of clade F that had washed ashore and were dormant with an intact epiphragm (Hirano et al, pers.…”

Section: Discussionmentioning

confidence: 61%

“…These results imply that the first geographical isolation occurred between clades E and F with the lineages of clade F subsequently transported by oceanic currents, while secondary contact occurred in the Iheya, Izena and Noho Islands relatively recently ([node 26: 1.23 Ma [UL model] and 0.86 Ma [SC model] in COI , 0.51 Ma [UL model] and 0.25 Ma [SC model] in 16S; Table ; Figure ). In general, the salt tolerance of terrestrial molluscs is poor (Machin, ), but prior studies since Darwin () testing the salt tolerance of land snails (Aucapitaine, ; Holland & Cowie, ; Mayr & Rosen, ) have indicated that the individuals washed ashore were dormant with a thin membrane on the shell aperture called an epiphragm, and depending on the species, could have survived for up to 20 days, even if immersed in seawater (Ożgo, Örstan, Kirschenstein, & Cameron, ). Clades D and F inhabited both coastal and inland areas and we found some individuals of clade F that had washed ashore and were dormant with an intact epiphragm (Hirano et al., pers.…”

Section: Discussionmentioning

confidence: 99%

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Divergence before and after the isolation of islands: Phylogeography of the Bradybaena land snails on the Ryukyu Islands of Japan

Hirano

Kameda

Saito

et al. 2019

Journal of Biogeography

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Aim Vicariance events have been proposed as a major source of lineage divergence on continental islands, whereas dispersal events followed by isolation have been proposed as the major cause on oceanic islands. However, organisms on continental islands may include taxa with characteristics similar to those on oceanic islands. Lineage divergence unassociated with the geological events that separated islands may also have occurred. This study addresses these possibilities through morphological and molecular phylogeographic analyses of land snails (Bradybaena) on continental islands. Location Samples were mainly collected on the Ryukyu and Izu Islands in Japan. Methods Molecular phylogenetic analyses using mtDNA (16S rRNA+COI) and nDNA (18S rRNA+ITS1+5.8S rRNA+ITS2+28S rRNA) were conducted for 225 individuals comprising B. circulus, B. phaeogramma and four of its subspecies endemic to the Ryukyu Islands. Shell and genital morphologies were also examined using qualitative and statistical methods. Results The Bradybaena populations examined were phylogenetically classified into six major clades whose divergence occurred during either Miocene‐Pliocene or Pliocene‐Pleistocene. Although phylogeographic patterns estimated on the basis of the 16S rRNA gene support the vicariance hypothesis for the origin of the major clades of Bradybaena, the phylogeographic patterns estimated by COI showed that these major clades resulted from diversification before the archipelagos separated from the continent. Both of these phylogeographic patterns suggest that genetic divergence occurred by dispersal from the southern to northern islands after divergence of major clades. The inferred phylogenies document parallel morphological evolution, yielding phylogenetic, morphological and taxonomic incongruences that created mosaic geographical patterns in the distribution of nominal taxa. Main conclusions Lineage diversification in endemic species on continental islands can occur before archipelago separation or subsequently via dispersal, as is seen in species on oceanic islands. Mechanisms other than vicariance should also be considered when estimating processes that created geographical patterns of genetic variations on continental islands.

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Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Divergence before and after the isolation of islands: Phylogeography of the Bradybaena land snails on the Ryukyu Islands of Japan

Hirano

Kameda

Saito

et al. 2019

Journal of Biogeography

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“…When confronted by flooding, slugs and snails actively migrate, but their ability to move is insufficient to escape brutal inundation. They can be transported passively, thereby colonizing new habitats (by water itself, driftwood, or large animals; Dahl et al ., 1993 ; Ożgo et al ., 2015 ). They can avoid drowning by climbing onto emerging substrates or floating vegetation or by using air-filled cavities in the soil ( Dahl et al ., 1993 ).…”

Section: Extreme Eventsmentioning

confidence: 99%

“…Although dispersal in minute gastropods is mainly passive (wind, water, animal, mainly birds and human transport; e.g. Dörge et al ., 1999 ; Aubry et al ., 2006 ; Ożgo et al ., 2015 ; Simonová et al ., 2016 ), active dispersal is expected to play an important role at a local scale ( Aubry et al ., 2006 ). Active dispersal is known to be a highly variable trait, within and among populations, as a response to cost–benefit balance, depending on the species traits and environmental context and with potential consequences on population dynamics ( Bonte et al ., 2012 ; Clobert et al ., 2012 ).…”

Section: Habitat Loss and Fragmentationmentioning

confidence: 99%

Conservation at a slow pace: terrestrial gastropods facing fast-changing climate

Nicolaï

Ansart

2017

Conservation Physiology

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Climate change, potentially increased by anthropogenic pressure, is still poorly considered in species status assessments for conservation. Terrestrial gastropods are expected to be greatly impacted, with subsequent effects on ecosystem functioning. We show the need to integrate physiological and behavioural traits to improve projection of the effects of climate change and conservation management for species at risk.

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“…In the movement and establishment stages, larger animals might have a survival advantage since their relative metabolic rate (relative to body size) is lower than that of smaller species (Andrews and Pough 1985, White et al 2019), which improves their resistance to stress (including long periods of food and water shortage; Van Bocxlaer et al 2010). On the other hand, transoceanic, cyclone‐driven rafting dispersal of small organisms has long been reported (Ozgo et al 2016, Lindo 2020). Establishment at a new location depends first and foremost upon the arrival of a reproductively viable founding population, which is determined by population size and species' life history traits (Safriel and Ritte 1980).…”

Section: Introductionmentioning

confidence: 99%

Chameleon biogeographic dispersal is associated with extreme life history strategies

et al. 2022

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Understanding the role of traits in dispersal is necessary to improve our knowledge of historical biogeography, community assembly processes and predictions of species' future movements. Here we aimed to determine the relationship between three traits (coastal distribution, body size, position on the fast/slow life history continuum) and past dispersal probability on an evolutionary timescale in chameleons (Chamaeleonidae). Using species' distribution data we identified the nine most important biogeographic regions for all included chameleons (181/217 species). We compiled life history trait data and used phylogenetic factor analysis to infer independent body size and fast/slow life history trait axes. Finally, we tested whether traits and trait combinations related to biogeographic dispersal success in the past, using trait‐dependent biogeographic models. All three traits were associated with past biogeographical movements. Lineages having coastal distributions and those with large bodies had higher dispersal probabilities. Interestingly, chameleons with either a very fast or very slow life history were more successful dispersers than species with an intermediate strategy. Together, the three traits – coastal, large‐bodied and extreme life history – form a dispersal syndrome. Traits have played an important role in the biogeographic history of chameleons. While only fast traits have been linked to present‐day invasion success in reptiles, both extremes of the life history spectrum were likely advantageous for dispersal and establishment during past biogeographic movements. Fast‐living species may be less susceptible to stochastic extinction in the first phases of a colonization (due to rapid population growth), and slow‐living species may be less vulnerable to environmental stochasticity (due to low demographic variability). Our results call for broader analyses testing the general influence of life history strategy in biogeographic dispersal success, which would help explain species distribution patterns on Earth.

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Dispersal of land snails by sea storms

Cited by 24 publications

References 9 publications

Divergence before and after the isolation of islands: Phylogeography of the Bradybaena land snails on the Ryukyu Islands of Japan

Divergence before and after the isolation of islands: Phylogeography of the Bradybaena land snails on the Ryukyu Islands of Japan

Conservation at a slow pace: terrestrial gastropods facing fast-changing climate

Chameleon biogeographic dispersal is associated with extreme life history strategies

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