20 Works

Data from: Spatial heterogeneity in the Mediterranean Biodiversity Hotspot affects barcoding accuracy of its freshwater fishes

Matthias F. Geiger, Fabian Herder, Michael T. Monaghan, Vitor Almada, Roberta Barbieri, Michel Bariche, Patrick Berrebi, Jörg Bohlen, Miriam Casal-Lopez, Gaël P. J. Denys, Agnès Dettai, Ignacio Doadrio, Elena Kalogianni, Heiko Kärst, Maurice Kottelat, Marcelo Kovačić, Martin Laporte, Massimo Lorenzoni, Zoran Marčić, Müfit Özuluğ, Anabel Perdices, Silvia Perea, Henri Persat, Stefano Porcellotti, Cesare Puzzi … & G. B. Delmastro
Incomplete knowledge of biodiversity remains a stumbling block for conservation planning, and even occurs within globally important Biodiversity Hotspots. Although technical advances have boosted the power of molecular biodiversity assessments, the link between DNA sequences and species and the analytics to discriminate entities, remain crucial. Here, we present an analysis of the first DNA barcode library for the freshwater fish fauna of the Mediterranean Biodiversity Hotspot (526 spp.), with virtually complete species coverage (498 spp.,...

Data from: Alien species spreading via biofouling on recreational vessels in the Mediterranean Sea

Aylin Ulman, Jasmine Ferrario, Aitor Forcada, Hanno Seebens, Christos Arvanitidis, Anna Occhipinti-Ambrogi & Agnese Marchini
1. Despite the Mediterranean being both a hotspot for recreational boating and for non-indigenous species (NIS), no data currently exists on the recreational boating sector’s contribution to the spread of NIS in this Sea. 2. To improve the basis for management decisions, a wide-scale sampling study on the biofouling communities of recreational vessels and marinas was undertaken. Specifically, we surveyed over 600 boat owners and sampled the same boat hulls for NIS in 25 marinas...

Data from: Exploring neutral and adaptive processes in expanding populations of gilthead sea bream, Sparus aurata L., in the North-East Atlantic

Stefano Mariani, Ilaria Coscia, Emmanouella Vogiatzi, Georgios Kotoulas & Costas S. Tsigenopoulos
Recent studies in empirical population genetics have highlighted the importance of taking into account both neutral and adaptive genetic variation in characterizing microevolutionary dynamics. Here we explore the genetic population structure and the footprints of selection in four populations of the warm-temperate coastal fish, the gilthead sea bream (Sparus aurata), whose recent northward expansion has been linked to climate change. Samples were collected at four Atlantic locations, including Spain, Portugal, France and the South of...

Diversity and biogeography of Mediterranean freshwater blennies (Blenniidae, Salaria)

Maximilian Wagner, Stamatis Zogaris, Patrick Berrebi, Jörg Freyhof, Stephan Koblmüller, Pierre Magnan & Martin Laporte
Aim: In the Mediterranean Biodiversity Hotspot freshwater fishes are key biogeographical indicators while their habitats are vulnerable to ongoing anthropogenic pressures. The freshwater blenny is a widespread endemic taxon in this area. However, our understanding of the overall diversity of specific populations and their phylogenetic relationships is sparse. Thus, we aim to investigate the genetic diversity, infer relationships among sampled populations related to major paleoenvironmental changes and suggest insights for future research and conservation targets....

Data from: Imprints from genetic drift and mutation imply relative divergence times across marine transition zones in a pan-European small pelagic fish (Sprattus sprattus)

Morten T. Limborg, Reinhold Hanel, Paul V. Debes, Anna-Karin Ring, Costas S. Tsigenopoulos, Dorte Bekkevold & Carl Andre
Geographic distributions of most temperate marine fishes are affected by post-glacial recolonisation events which have left complex genetic imprints on populations of marine species. This study investigated population structure and demographic history of European sprat (Sprattus sprattus L.) by combining inference from both mtDNA and microsatellite genetic markers throughout the species distribution. We compared effects from genetic drift and mutation for both genetic markers in shaping genetic differentiation across four transition zones. Microsatellite markers revealed...

Data from: Strong population genetic structure and contrasting demographic histories for the small-spotted catshark (Scyliorhinus canicula) in the Mediterranean Sea

Vasiliki Kousteni, Panagiotis Kasapidis, Georgios Kotoulas & Persefoni Megalofonou
Coastal and demersal chondrichthyans, such as the small-spotted catshark, are expected to exhibit genetic differentiation in areas of complex geomorphology like the Mediterranean Basin because of their limited dispersal ability. To test this hypothesis, we used a fragment of the mitochondrial cytochrome c oxidase subunit I gene and 12 nuclear microsatellite loci in order to investigate the genetic structure and historical demography of this species, and to identify potential barriers to gene flow. Samples were...

Disentangling responses to natural stressor and human impact gradients in river ecosystems across Europe

Rachel Stubbington, Romain Sarremejane, Alex Laini, Núria Cid, Zoltán Csabai, Judy England, Antoni Munné, Tom Aspin, Núria Bonada, Daniel Bruno-Collados, Sophie Cauvy-Fraunie, Richard Chadd, Claudia Dienstl, Pau Fortuño, Wolfram Graf, Cayetano Gutiérrez-Cánovas, Andy House, Ioannis Karaouzas, Eleana Kazila, Andrés Millán, Maria Morais, Petr Pařil, Alex Pickwell, Marek Polášek, David Sánchez-Fernández … & Thibault Datry
1. Rivers are dynamic ecosystems in which both human impacts and climate-driven drying events are increasingly common. These anthropogenic and natural stressors interact to influence the biodiversity and functioning of river ecosystems. Disentangling ecological responses to these interacting stressors is necessary to guide management actions that support ecosystems adapting to global change. 2. We analysed the independent and interactive effects of human impacts and natural drying on aquatic invertebrate communities—a key biotic group used to...

Data from: Micro-computed tomography: introducing new dimensions to taxonomy

Sarah Faulwetter, Aikaterini Vasileiadou, Michail Kouratoras, Thanos Dailianis & Christos Arvanitidis
Continuous improvements in the resolution of three-dimensional imaging have lead to an increased application of these techniques in conventional taxonomic research in recent years. Coupled with an ever increasing research effort in cybertaxonomy, three-dimensional imaging could give a boost to the development of virtual specimen collections, allowing rapid and simultaneous access to accurate virtual representations of type material. This paper explores the potential of micro-computed tomography, a non-destructive three-dimensional imaging technique based on X-ray energies,...

Data from: An account of the taxonomy and distribution of Syllidae (Annelida, Polychaetes) in the eastern Mediterranean, with notes on the genus Prosphaerosyllis San Martín, 1984 in the Mediterranean

Sarah Faulwetter, Georgios Chatzigeorgiou, Bella S. Galil & Christos Arvanitidis
The syllid fauna of three locations in Crete and Israel (Eastern Mediterranean Sea) was studied, yielding 82 syllid species, many of which were found for the first time in the respective areas: Seventeen species were recorded for the first time on the Israeli coasts and 20 in Greek waters. Perkinsyllis augeneri (Hartmann-Schröder, 1979) and Prosphaerosyllis chauseyensis Olivier et al., 2011 are new records for the Mediterranean Sea. Detailed information are given on the morphology, ecology...

Data from: Contemporary genetic structure and postglacial demographic history of the black scorpionfish, Scorpaena porcus, in the Mediterranean and the Black Seas

Emilie Boissin, Dragos Micu, Marion Janczyszyn-Le Goff, Valentina Neglia, Levent Bat, Valentina Todorova, Marina Panayotova, Claudia Kruschel, Vesna Macic, Nataliya Milchakova, Çetin Keskin, Aikaterini Anastasopoulou, Ina Nasto, Lorenzo Zane & Serge Planes
Understanding the distribution of genetic diversity in the light of past demographic events linked with climatic shifts will help to forecast evolutionary trajectories of ecosystems within the current context of climate change. In this study, mitochondrial sequences and microsatellite loci were analysed using traditional population genetic approaches together with Bayesian dating and the more recent approximate Bayesian computation scenario testing. The genetic structure and demographic history of a commercial fish, the black scorpionfish, Scorpaena porcus,...

Data from: A genome-wide approach to the phylogeography of the mussel Mytilus galloprovincialis in the Adriatic and the Black Seas

Marta Paterno, Levent Bat, Jamila B Souissi, Elisa Boscari, Aurore Chassanite, Leonardo Congiu, Giuseppe Guarnieri, Claudia Kruschel, Vesna Macic, Ilaria A Marino, Dragos Micu, Nataliya Milchakova, Marina Panayotova, Chiara Papetti, Stefan Strungaru, Valentina R Todorova, Emanuela Voutsinas & Lorenzo Zane
Connectivity between populations shapes the genetic structure of species being crucial for an effective management of environmental resources. Genetic approaches can provide indirect measures of connectivity, allowing the identification of genetically differentiated - unconnected - populations. In this study, we applied a 2b-RAD approach based on hundreds of polymorphic loci to provide the first detailed insight into the population genomics of the Mediterranean mussel Mytilus galloprovincialis in part of its native geographical range. We sampled...

Data from: Everything is not everywhere: marine compartments shape phytoplankton assemblages

Sofie Spatharis, Vasiliki Lamprinou, Alexandra Meziti, Konstantinos Kormas, Daniel Danielidis, Evangelia Smeti, Daniel Roelke, Rebecca Mancy & George Tsirtsis
The idea that “everything is everywhere, but the environment selects” has been seminal in microbial biogeography, and marine phytoplankton is one of the prototypical groups used to illustrate this. The typical argument has been that phytoplankton is ubiquitous, but that distinct assemblages form under environmental selection. It is well established that phytoplankton assemblages vary considerably between coastal ecosystems. However, the relative roles of compartmentalisation of regional seas and site-specific environmental conditions in shaping assemblage structures,...

Data from: Microsatellite length variation in candidate genes correlates with habitat in the gilthead sea bream Sparus aurata

Lamya Chaoui, Pierre-Alexandre Gagnaire, Bruno Guinand, Jean-Pierre Quignard, Costas Tsigenopoulos, M. Hichem Kara & Francois Bonhomme
The genetic basis and evolutionary implications of local adaptation in high gene flow marine organisms are still poorly understood. In several Mediterranean fish species, alternative migration patterns exist between individuals entering coastal lagoons that offer favorable conditions for growth and those staying in the sea where environmental conditions are less subject to rapid and stressful change. Whether these coexisting strategies are phenotypically plastic or include a role for local adaptation through differential survival needs to...

Data from: Genetic diversity of the imperiled bath sponge Spongia officinalis Linnaeus, 1759 across the Mediterranean Sea: patterns of population differentiation and implications for taxonomy and conservation

Thanos Dailianis, Costas S Tsigenopoulos, Costas Dounas & Eleni Voultsiadou
The Mediterranean bath sponge Spongia officinalis is an iconic species with high socio-economic value and imperiled present and future status due to unregulated harvesting, mortality incidents and lack of established knowledge regarding its ecology. This study aims to assess genetic diversity and population structure of the species at different geographic sectors and levels of geographic distance along its distribution. For this purpose, 11 locations in the eastern Mediterranean (Aegean Sea), western Mediterranean (Provence coast), and...

Data from: Comparative analysis reveals that polyploidy does not decelerate diversification in fish

Shing H. Zhan, Lior Glick, Costas S. Tsigenopoulos, Sally P. Otto & Itay Mayrose
While the proliferation of the species-rich teleost fish has been ascribed to an ancient genome duplication event at the base of this group, the broader impact of polyploidy on fish evolution and diversification remains poorly understood. Here, we investigate the association between polyploidy and diversification in several fish lineages: the sturgeons (Acipenseridae: Acipenseriformes), the botiid loaches (Botiidae: Cypriniformes), Cyprininae fishes (Cyprinidae: Cypriniformes) and the salmonids (Salmonidae: Salmoniformes). Using likelihood-based evolutionary methodologies, we co-estimate speciation and...

Linking Laser-Ablation ICP-MS analysis and sulfide textures in identifying gold remobilization and enrichment processes in modern seafloor massive sulfides, Kolumbo arc volcano, Greece

Stephanos P. Kilias , Evangelia Zygouri , Nikolaos Zegkinoglou , Manuel Keith , Thomas Zack , Daniel J. Smith , Paraskevi Nomikou & Paraskevi Polymenakou
Target settings to secure sustainable access to raw materials include seafloor massive sulphide (SMS) resources. Gold-rich SMS deposits, are often the result of complex interplay of multiple Au enrichment events. Recent studies have shown that high-grade Au ores result from Au remobilization from preexisting mineralization, driven by fluid-induced coupled dissolution-reprecipitation (CDR) reactions; however investigations into this process in modern Au-rich SMS, are lacking. To tackle this issue, Au-rich [AuBULK≤32ppm; Au/(Cu+Zn+Pb)=1.9], polymetallic (Sb, Tl, Hg, Ag,...

Data from: Selection, drift and introgression shape MHC polymorphism in lizards

Konstantinos Sagonas, Anna Runemark, Aglaia Antoniou, Petros Lymberakis, Panayiotis Pafilis, Efstratios D. Valakos, Nikos Poulakakis & Bengt Hansson
The Major Histocompatibility Complex (MHC) has long served as a model for the evolution of adaptive genetic diversity in wild populations. Pathogen-mediated selection is thought to be a main driver of MHC diversity, but it remains elusive to what degree selection shapes MHC diversity in complex biogeographical scenarios where other evolutionary processes (e.g. genetic drift and introgression) may also be acting. Here, we focus on two closely related green lizard species, Lacerta trilineata and L....

Data from: An account of the taxonomy and distribution of Syllidae (Annelida, Polychaetes) in the eastern Mediterranean, with notes on the genus Prosphaerosyllis San Martín, 1984 in the Mediterranean

Sarah Faulwetter, Georgios Chatzigeorgiou, Bella S. Galil & Christos Arvanitidis
The syllid fauna of three locations in Crete and Israel (Eastern Mediterranean Sea) was studied, yielding 82 syllid species, many of which were found for the first time in the respective areas: Seventeen species were recorded for the first time on the Israeli coasts and 20 in Greek waters. Perkinsyllis augeneri (Hartmann-Schröder, 1979) and Prosphaerosyllis chauseyensis Olivier et al., 2011 are new records for the Mediterranean Sea. Detailed information are given on the morphology, ecology...

Data from: Exploring neutral and adaptive processes in expanding populations of gilthead sea bream, Sparus aurata L., in the North-East Atlantic

Stefano Mariani, Ilaria Coscia, Emmanouella Vogiatzi, Georgios Kotoulas, Costas S. Tsigenopoulos, I Coscia & S Mariani
Recent studies in empirical population genetics have highlighted the importance of taking into account both neutral and adaptive genetic variation in characterizing microevolutionary dynamics. Here we explore the genetic population structure and the footprints of selection in four populations of the warm-temperate coastal fish, the gilthead sea bream (Sparus aurata), whose recent northward expansion has been linked to climate change. Samples were collected at four Atlantic locations, including Spain, Portugal, France and the South of...

Data from: Genetic diversity of the imperiled bath sponge Spongia officinalis Linnaeus, 1759 across the Mediterranean Sea: patterns of population differentiation and implications for taxonomy and conservation

Thanos Dailianis, Costas S Tsigenopoulos, Costas Dounas & Eleni Voultsiadou
The Mediterranean bath sponge Spongia officinalis is an iconic species with high socio-economic value and imperiled present and future status due to unregulated harvesting, mortality incidents and lack of established knowledge regarding its ecology. This study aims to assess genetic diversity and population structure of the species at different geographic sectors and levels of geographic distance along its distribution. For this purpose, 11 locations in the eastern Mediterranean (Aegean Sea), western Mediterranean (Provence coast), and...

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