A molecular phylogeny and historical biogeography of the marine sponge genus Placospongia (Phylum Porifera) indicate low dispersal capabilities and widespread crypsis

Nichols, Scott; Barnes, Penélope A. G.

doi:10.1016/j.jembe.2005.02.012

Cited by 51 publications

(50 citation statements)

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“…Nucleotide diversities among Crambe crambe (Poecilosclerida) and Astrosclera willeyana (Agelasida) populations collected from locations several thousand kilometres apart were found to be very low (Duran et al 2004;Wörheide 2006). However, the existence of cryptic species can cause unexpected molecular distances within a supposedly cosmopolitan species (Klautau et al 1999;Lazoski et al 2001;Nichols and Barnes 2005). In fact, the distribution of sponge species is frequently overestimated, for example as a result of difficulty in distinguishing taxa with few morphological characters, and the presence of sibling species could have been overlooked.…”

Section: Discussionmentioning

confidence: 99%

“…However, molluscan mariculture attempts in the Caribbean appear to have begun some years after the original description of Pione lampa was published (Jory and Iversen 1985). Moreover, the dispersal abilities of sponges in general (Klautau et al 1999;Lazoski et al 2001;Nichols and Barnes 2005), and of other members of the Clionaidae family in particular (Mariani et al 2000), are rather limited. Thus, the records of P. lampa from various widely separated geographical areas, and the species' hypothesized cosmopolitanism, are unreliable as long as they have not been tested in molecular studies.…”

Section: Discussionmentioning

confidence: 99%

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Two Pione species (Hadromerida, Clionaidae) from the Red Sea: a taxonomical challenge

et al. 2010

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Boring sponges of the genus Pione (Hadromerida, Clionaidae) are easily recognizable due to their spiculation. However, species identification is challenging, as the potentially diagnostic morphological character states of different species often overlap. For this reason, this group of species is frequently referred to as the 'Pione vastifica complex', after the most well-studied species of the genus. Boring-sponge samples were collected in the Red Sea and identified as P. cf. lampa and P. cf. vastifica, respectively. So far, these two species names have usually been considered as valid, although some authors suggested them to be synonymous. Morphological analyses were performed on spicules and micro-erosion patterns by means of both light and scanning electron microscopy. Two apparent morphotypes can be distinguished, mainly by the growth form, but statistical analysis does not support a clear separation in two species. In addition, a DNA barcoding approach using sequences of CO1 has not identified any nucleotide sequence differences. These data support the hypothesis that P. cf. lampa and P. cf. vastifica from the Red Sea are conspecific.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Two Pione species (Hadromerida, Clionaidae) from the Red Sea: a taxonomical challenge

et al. 2010

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“…Similar results are reported for other sponges with relatively high levels of IGV such as Placospongia sp. (Nichols & Barnes, 2005) and Prosuberites laughlini (Wörheide et al, 2004) suggesting that, the rDNA spacers are not appropriate markers for fine-scale population studies that include species with levels of IGV greater than 1% (Table 3). …”

Section: Discussionmentioning

confidence: 99%

“…In sponges, however, the use of this marker for studies at this systematic level is limited to a few studies (e.g. Lopez et al, 2002;Wörheide et al, 2002a,b;Duran et al, 2004b;Lobo-Hajdu et al, 2004;Nichols & Barnes, 2005;Schmitt et al, 2005). Most of these studies have shown that the ITS spacers have an appropriate rate of evolution to study relationships of sponges at the level of species and for the differentiation of species complexes, nevertheless the use of this region in phylogenetic analyses needs to be carefully considered.…”

Section: Introductionmentioning

confidence: 99%

“…(28 individuals, 12 populations), Spirastrella harmani (two individuals), S. sabogae (one individual) and Polymastia sp. (one individual) (Duran et al, 2004a;Nichols & Barnes, 2005;Schmitt et al, 2005). Wörheide et al (2004) however, studied in more detail the extent of IGV levels in a variety of demosponge taxa: Verticillitida, Vaceletia sp., Dictyoceratida, Dysidea sp.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of intragenomic variation of the rDNA internal transcribed spacers (ITS) in Halichondrida (Porifera: Demospongiae)

Alvarez¹,

Krishnan

Gibb

2007

J. Mar. Biol. Ass.

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Three species of sponges, Axinella aruensis, Phakellia sp. and Acanthella cavernosa, were selected to investigate the extent of intragenomic variation (IGV) in the internal transcribed spacers (ITS-1 and ITS-2) of the ribosomal DNA within the order Halichondrida. The IGV was detected in both the spacers and in the three species. At least three non-identical sequences were found in any single individual with the number of polymorphic sites within species ranging from 6 to 77. Uncorrected distance values up to 29% were observed in the ITS-2 of Axinella aruensis. The levels of polymorphism found in this species are the highest reported for Porifera and comparable to those observed in hybrid species of scleractinean corals. Analyses of ITS sequences from multiple clones from individuals of Halichondrida are strongly recommended if these genetic markers are to be used to depict phylogenetic and/or phylogeographic relationships of closely related species and their populations. Data from other nuclear and mitochondrial markers should be used to complement conclusions derived from studies based on ITS sequences.

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Genetic structure and diversity of the endangered bath sponge Spongia lamella

Pérez‐Portela

Noyer

Becerro

2014

Aquatic Conservation

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ABSTRACT1. Natural populations of Mediterranean commercial sponges have declined substantially over recent decades. 2. The present study explored the distribution of genetic diversity of the endangered bath sponge Spongia lamella along the western Mediterranean and the Portuguese coast.3. Seven microsatellite markers were used to genotype 231 individuals scattered over nine populations. Basic genetic descriptors and population genetic analyses based on F ST test, analyses of the molecular variance (AMOVA), Bayesian clustering, dissimilarity analysis of principal components, and demographic analyses were performed.4. Genetic differentiation between populations was large and highly significant (global F ST = 0.236, P < 0.001). AMOVA and Bayesian analyses showed genetic differentiation among the Atlantic, Balearic, and North Mediterranean areas (F CT = 0.129, P = 0.003).5. Restricted gene flow owing to short-distance larval dispersal and hydrographical barriers may be playing an important role in genetic differentiation.6. Recent bottlenecks were also detected for most populations of this sponge. 7. The high levels of inbreeding, sub-structuring, and modest levels of genetic diversity that characterized populations of S. lamella (mean value of genetic diversity 0.512), may compromise its long-term survival. Only one population, from the Gibraltar Strait, presented high levels of genetic diversity (Ceuta, genetic diversity = 0.657), indicating a hotspot of genetic diversity for this species with special relevance for its conservation.8. Disease outbreaks and overexploitation may be the most important causes of genetic diversity impoverishment of S. lamella.9. Future conservation guidelines should focus on preserving genetic diversity within genetically impoverished populations by limiting exploitation, and increasing population size. Transplanting specimens from areas with high values of genetic diversity to areas with low diversity values or to areas that have recently experienced demographic declines could reverse the local and global recession of this species.

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A molecular phylogeny and historical biogeography of the marine sponge genus Placospongia (Phylum Porifera) indicate low dispersal capabilities and widespread crypsis

Cited by 51 publications

References 38 publications

Two Pione species (Hadromerida, Clionaidae) from the Red Sea: a taxonomical challenge

Two Pione species (Hadromerida, Clionaidae) from the Red Sea: a taxonomical challenge

Analysis of intragenomic variation of the rDNA internal transcribed spacers (ITS) in Halichondrida (Porifera: Demospongiae)

Genetic structure and diversity of the endangered bath sponge Spongia lamella

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