Cryptic speciation or global spread? The case of a cosmopolitan marine invertebrate with limited dispersal capabilities

Pérez‐Portela, Rocío; Arranz, Vanessa; Rius, Marc; Turon, Xavier

doi:10.1038/srep03197

Cited by 61 publications

(25 citation statements)

References 58 publications

(81 reference statements)

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“…This is in contrast to other studies on mites, insects, or other invertebrates, which have shown that presumed widespread taxa often represent complexes of cryptic species (Cicconardi, Fanciulli, & Emerson, 2013; Navia et al, 2013; Pérez-Portela, Arranz, Rius, & Turon, 2013; Schäffer et al, 2010). However, a clear geographic pattern can be seen in the haplotypes, which means that populations from different geographic locations do not show extensive gene flow between each other and dispersal may be limited.…”

Section: Discussioncontrasting

confidence: 93%

Leaving the tropics: The successful colonization of cold temperate regions byDolicheremaeus dorni(Acari, Oribatida)

Schäffer

Stabentheiner

Shimano

et al. 2018

J Zool Syst Evol Res

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Species diversity is generally higher in the tropics compared to the temperate zones. The phenomenon that one species of an almost exclusively tropical living genus was able to adapt successfully to the cold northern regions is rather rare. However, the oribatid mite Dolicheremaeus dorni represents such a species and is in the focus of this study. While 180 Dolicheremaeus species are confined to the tropics and subtropics, only five species are known to occur in temperate climates and D. dorni represents the only species with a wider distribution in this climatic region. This species is distributed in Central and Southern Europe and was now recorded for the first time in Austria. A morphological and molecular genetic investigation of specimens from Austria, Poland and Croatia confirmed this distribution pattern and revealed specific geographic clades and haplotypes for each population and hence indicate low gene flow between populations. A further molecular genetic analysis of the 18S rRNA gene sequence of D. dorni confirmed its phylogenetic position within Carabodoidea. Based on record information, this species is associated with trees or tree habitats and seems to be rather a generalist than a specialist for a specific substrate (e.g., tree species) or food source.

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Section: Discussioncontrasting

confidence: 93%

Leaving the tropics: The successful colonization of cold temperate regions byDolicheremaeus dorni(Acari, Oribatida)

Schäffer

Stabentheiner

Shimano

et al. 2018

J Zool Syst Evol Res

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“…The sequences generated for Clavelina lepadiformis corresponded to the introduced Atlantic clade defined in Turon et al ( 2003 ). All sequences obtained for Diplosoma listerianum corresponded to clade A (Pérez-Portela et al 2013 ), sequences for C. intestinalis matched species A described in Caputi et al ( 2007 ) and Nydam and Harrison ( 2007 ), and sequences for B. schlosseri corresponded to clade 5 in López-Legentil et al ( 2006 ), except for KF309545 that matched clade 1, and two sequences (KF309592, KF309530) that presented 98 % identity (BLASTn) with a USA specimen (GU065352, Callahan et al 2010 ). Identification of Ascidiella scabra and A. aspersa was made based on morphological characters following a recent review (Nishikawa et al 2014 ).…”

Section: Resultsmentioning

confidence: 99%

Harbor networks as introduction gateways: contrasting distribution patterns of native and introduced ascidians

et al. 2014

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Harbors and marinas are well known gateways for species introductions in marine environments but little work has been done to ascertain relationships between species diversity, harbor type, and geographic distance to uncover patterns of secondary spread. Here, we sampled ascidians from 32 harbors along ca. 300 km of the NW Mediterranean coast and investigated patterns of distribution and spread related to harbor type (marina, fishing, commercial) and geographic location using multivariate techniques. In total, 28 ascidians were identified at the species level and another 9 at the genus level based on morphology and genetic barcoding. Eight species were assigned to introduced forms, 15 were given native status and 5 were classified as cryptogenic. Aplidium accarense was reported for the first time in the Mediterranean Sea and was especially abundant in 23 of the harbors. Introduced and cryptogenic species were abundant in most of the surveyed harbors, while native forms were rare and restricted to a few harbors. Significant differences in the distribution of ascidians according to harbor type and latitudinal position were observed. These differences were due to the distribution of introduced species. We obtained a significant correlation between geographic distance and ascidian composition, indicating that closely located harbors shared more ascidian species among them. This study showed that harbors act as dispersal strongholds for introduced species, with native species only appearing sporadically, and that harbor type and geographic location should also be considered when developing management plans to constrain the spread of non-indigenous species in highly urbanized coastlines.Electronic supplementary materialThe online version of this article (doi:10.1007/s10530-014-0821-z) contains supplementary material, which is available to authorized users.

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“…However, marine species live in a dispersive environment and there is a large number of cryptic, co-existing native and non-native marine species (e.g. in tunicates; Bock et al 2012;Perez-Portela et al 2013). Furthermore, the increasing rate of marine biological invasions on the global scale facilitates numerous secondary contacts between allopatric taxa (Geller et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Co-occurrence and reproductive synchrony do not ensure hybridization between an alien tunicate and its interfertile native congener

et al. 2015

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Biological invasions can promote secondary contacts between related species and thus provide excellent case studies for investigating the joint ecological and evolutionary trajectories of interfertile taxa. Here, we studied two tunicates living in sympatry, and sometimes in syntopy, in the English Channel, Ciona intestinalis species A (presumed native to the NW Pacific) and species B (native to the N Atlantic). In addition to monitoring their co-existence over time, we examined the level of interspecific gene flow, a process that may increase the invasiveness of the non-native species. The sampling scheme was repeated twice a year for 3 years (six distinct generations) to determine the relative abundance of the two species in 11 localities along the coasts of the English Channel and the Iroise Sea (covering 1600 km) in Brittany, France. We examined 23,000 individuals, including 5315 specimens for which reproductive status was determined. Four speciesdiagnostic molecular markers traced interspecific gene flow on a random subset of 3048 individuals. Regardless of the sampling date, the two species co-occurred in most of the study sites, with species A showing higher frequency in the autumn. The regional pattern of seasonal variation in relative abundance of the two congeners appears to correspond to different thermal growth optima. Abrupt variations in environmental parameters can act synergistically and may favor the non-native species locally. Despite syntopy, synchronous gamete production and successful in vitro interspecific crosses, only 4.3 % individuals Electronic supplementary material The online version of this article (showed an admixed genome (i.e. footprint of present-day or past introgression events), most of them with a species A maternal lineage, of which only one was a putative first generation hybrid. Altogether, efficient barriers seem to prevent interspecific crosses between the two interfertile congeners in the wild: present-day hybridization may have less impact than competitive interactions on the fate of the two study species over their sympatric range.

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Cryptic speciation or global spread? The case of a cosmopolitan marine invertebrate with limited dispersal capabilities

Cited by 61 publications

References 58 publications

Leaving the tropics: The successful colonization of cold temperate regions byDolicheremaeus dorni(Acari, Oribatida)

Leaving the tropics: The successful colonization of cold temperate regions byDolicheremaeus dorni(Acari, Oribatida)

Harbor networks as introduction gateways: contrasting distribution patterns of native and introduced ascidians

Co-occurrence and reproductive synchrony do not ensure hybridization between an alien tunicate and its interfertile native congener

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