19 Works

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: Theory, practice, and conservation in the age of genomics: the Galápagos giant tortoise as a case study

Stephen J. Gaughran, Maud C. Quinzin, Joshua M. Miller, Ryan C. Garrick, Danielle L. Edwards, Michael A. Russello, Nikos Poulakakis, Claudio Ciofi, Luciano B. Beheregaray, Aldalgisa Caccone & Adalgisa Caccone
Hgh-throughput DNA sequencing allows efficient discovery of thousands of single nucleotide polymorphisms (SNPs) in non-model species. Population genetic theory predicts that this large number of independent markers should provide detailed insights into population structure, even when only a few individuals are sampled. Still, sampling design can have a strong impact on such inferences. Here, we use simulations and empirical SNP data to investigate the impacts of sampling design on estimating genetic differentiation among populations that...

Data from: Conservation phylogeography: does historical diversity contribute to regional vulnerability in European tree frogs (Hyla arborea)

Christophe Dufresnes, Jérôme Wassef, Karim Ghali, Alan Brelsford, Matthias Stöck, Petros Lymberakis, Jelka Crnobrnja-Isailović & Nicolas Perrin
Documenting and preserving the genetic diversity of populations, which conditions their long-term survival, has become a major issue in conservation biology. The loss of diversity often documented in declining populations is usually assumed to result from human disturbances; however, historical biogeographic events, otherwise known to strongly impact diversity, are rarely considered in this context. We apply a multi-locus phylogeographic study to investigate the late-Quaternary history of a tree frog (Hyla arborea) with declining populations in...

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: Genetic rediscovery of an ‘extinct’ Galápagos giant tortoise species

Ryan C. Garrick, Edgar Benavides, Michael Russello, James Gibbs, Nikos Poulakakis, Kirstin Dion, Chaz Hyseni, Brittney Kajdacsi, Lady Márquez, Sarah Bahan, Claudio Ciofi, Washington Tapia, Adalgisa Caccone, Kirstin B. Dion, James P. Gibbs & Michael A. Russello
Genes from recently extinct species can live on in the genomes of extant individuals of mixed ancestry. Recently, Poulakakis et al. detected genetic signatures of the giant Galápagos tortoise once endemic to Floreana Island (Chelonoidis elephantopus) within eleven hybrid individuals of otherwise pure C. becki on Volcano Wolf, Isabela Island. Movement of tortoises among islands by pirate and whaling ships was not uncommon during the 1800’s, representing a likely mechanism by which individuals from Floreana...

Data from: Timeframe of speciation inferred from secondary contact zones in the European tree frog radiation (Hyla arborea group)

Christophe Dufresnes, Alan Brelsford, Jelka Crnobrnja-Isailović, Nikolay Tzankov, Petros Lymberakis & Nicolas Perrin
Background: Hybridization between incipient species is expected to become progressively limited as their genetic divergence increases and reproductive isolation proceeds. Amphibian radiations and their secondary contact zones are useful models to infer the timeframes of speciation, but empirical data from natural systems remains extremely scarce. Here we follow this approach in the European radiation of tree frogs (Hyla arborea group). We investigated a natural hybrid zone between two lineages (Hyla arborea and Hyla orientalis) of...

Data from: Phylogeography of Aegean green toads (Bufo viridis subgroup): continental hybrid swarm vs. insular diversification with discovery of a new island endemic

Christophe Dufresnes, Petros Lymberakis, Panagiotis Kornilios, Romain Savary, Nicoals Perrin & Matthias Stöck
Background: Debated aspects in speciation research concern the amount of gene flow between incipient species under secondary contact and the modes by which post-zygotic isolation accumulates. Secondary contact zones of allopatric lineages, involving varying levels of divergence, provide natural settings for comparative studies, for which the Aegean (Eastern Mediterranean) geography offers unique scenarios. In Palearctic green toads (Bufo viridis subgroup or Bufotes), Plio-Pleistocene (~2.6 Mya) diverged species show a sharp transition without contemporary gene flow,...

Data from: The Chlamydiales pangenome revisited: structural stability and functional coherence

Fotis E. Psomopoulos, Victoria I. Siarkou, Nikolas Papanikolaou, Ioannis Iliopoulos, Athanasios S. Tsaftaris, Christos A. Ouzounis & Vasilis J. Promponas
The entire publicly available set of 37 genome sequences from the bacterial order Chlamydiales has been subjected to comparative analysis in order to reveal the salient features of this pangenome and its evolutionary history. Over 2,000 protein families are detected across multiple species, with a distribution consistent to other studied pangenomes. Of these, there are 180 protein families with multiple members, 312 families with exactly 37 members corresponding to core genes, 428 families with peripheral...

Data from: Genetic elimination of field-cage populations of Mediterranean fruit flies

Philip T. Leftwich, Martha Koukidou, Polychronis Rempoulakis, Hong-Fei Gong, Antigoni Zacharapolou, Tracey Chapman, Aris Economopolous, John Vontas, Luke Alphey, A. Economopoulos & A. Zacharopoulou
The Mediterranean fruit fly (medfly, Ceratitis capitata Wiedemann) is a pest of over 300 fruits, vegetables and nuts. The sterile insect technique (SIT) is a control measure used to reduce the reproductive potential of populations through the mass release of sterilized male insects that mate with wild females. However, SIT flies can display poor field performance, due to the effects of mass-rearing and of the irradiation process used for sterilization. The development of female-lethal RIDL...

Data from: Genome-wide markers untangle the green-lizard radiation in the Aegean Sea and support a rare biogeographical pattern

Panagiotis Kornilios, Evanthia Thanou, Petros Lymberakis, Çetin Ilgaz, Yusuf Kumlutaş & Adam Leache
Aim: The Aegean Sea constitutes a major biogeographic barrier between the European and Asian continents and several models of diversification in the Aegean have been documented. Here we test three of those models for the Aegean green-lizards (Lacerta trilineata–pamphylica group): Vicariance vs. Overland Dispersal vs. Island Stepping-stone Dispersal. We investigate these hypotheses and complement our knowledge on the impact of the Aegean Barrier on east Mediterranean taxa. Location: Aegean Sea, east Mediterranean Taxon: Lacerta lizards...

Data from: A new lineage of Galapagos giant tortoises identified from museum samples

Evelyn L. Jensen, Maud C. Quinzin, Joshua M. Miller, Michael A. Russello, Ryan Garrick, Danielle L. Edwards, Scott Glaberman, Ylenia Chiari, Nikos Poulakakis, Washington Tapia, James P. Gibbs & Adalgisa Caccone
The Galapagos Archipelago is recognized as a natural laboratory for studying evolutionary processes. San Cristóbal was one of the first islands colonized by tortoises, which radiated from there across the archipelago to inhabit 10 islands. Here, we sequenced the mitochondrial control region from six historical giant tortoises from San Cristóbal (five long deceased individuals found in a cave and one found alive during an expedition in 1906) and discovered that the five from the cave...

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...

Computerized analysis of brain MRI parameters dynamics in young patients with Cushing Syndrome – a case-control study

Amit Tirosh, Harish RaviPrakash, Georgios Z Papadakis, Christina Tatsi, Elena Belyavskaya, Lyssikatos Charalampos, Maya B. Lodish, Ulas Bagci & Constantine A Stratakis
Background – Young patients with Cushing Syndrome (CS) may develop cognitive and behavioral alterations during disease course. Methods - To define the implications of CS on the brain, we analyzed consecutive MRI scans of patients with (n=29) vs. without CS (n=8). Multiple brain compartments were processed for total and gray/white matter (GM/WM) volumes and intensities; and cortical volume, thickness and surface-area. Dynamics (last/baseline scans ratio per parameter) were analyzed vs. cortisol levels and CS status...

Data from: Fitness costs of key point mutations that underlie acaricide target-site resistance in the two-spotted spider mite Tetranychus urticae

Sabina Bajda, Maria Riga, Nicky Wybouw, Stavrini Papadaki, Eleni Ouranou, Seyedeh Masoumeh Fotoukkiaii, John Vontas & Thomas Van Leeuwen
The frequency of insecticide/acaricide target-site resistance is increasing in arthropod pest populations and is typically underpinned by single point mutations that affect the binding strength between the insecticide/acaricide and its target-site. Theory predicts that although resistance mutations clearly have advantageous effects under the selection pressure of the insecticide/acaricide, they might convey negative pleiotropic effects on other aspects of fitness. If such fitness costs are in place, target-site resistance is thus likely to disappear in the...

Data from: Regulation of reproductive processes with Dynamic Energy Budgets

Erik B. Muller, Konstadia Lika, Roger M. Nisbet, Irvin R. Schultz, Jerome Casas, Andre Gergs, Cheryl A. Murphy, Diane Nacci & Karen H. Watanabe
1. Linking organismal level processes to underlying suborganismal mechanisms at the molecular, cellular and organ level constitutes a major challenge for predictive ecological risk assessments. This challenge can be addressed with the simple bioenergetic models in the family of Dynamic Energy Budget (DEB), which consist of a small number of state equations quantifying universal processes, such as feeding, maintenance, development, reproduction and growth. 2. Motivated by the need for process-based models to evaluate the impact...

Data from: Agriculture shapes the trophic niche of a bat preying on multiple pest arthropods across Europe: evidence from DNA metabarcoding

Ostaizka Aizpurua, Ivana Budinski, Panagiotis Georgiakakis, Shyam Gopalakrishnan, Carlos Ibáñez, Vanessa Mata, Hugo Rebelo, Danilo Russo, Farkas Szodoray-Parádi, Violeta Zhelyazkova, Vida Zrncic, M. Thomas P. Gilbert & Antton Alberdi
The interaction between agricultural production and wildlife can shape, and even condition, the functioning of both systems. In this study we i) explored the degree to which a widespread European bat, namely the common bent-wing bat Miniopterus schreibersii, consumes crop-damaging insects at a continental scale, and ii) tested whether its dietary niche is shaped by the extension and type of agricultural fields. We employed a dual-primer DNA metabarcoding approach to characterise arthropod 16S and COI...

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: The Chlamydiales pangenome revisited: structural stability and functional coherence

Fotis E. Psomopoulos, Victoria I. Siarkou, Nikolas Papanikolaou, Ioannis Iliopoulos, Athanasios S. Tsaftaris, Christos A. Ouzounis & Vasilis J. Promponas
The entire publicly available set of 37 genome sequences from the bacterial order Chlamydiales has been subjected to comparative analysis in order to reveal the salient features of this pangenome and its evolutionary history. Over 2,000 protein families are detected across multiple species, with a distribution consistent to other studied pangenomes. Of these, there are 180 protein families with multiple members, 312 families with exactly 37 members corresponding to core genes, 428 families with peripheral...

Data from: Genetic rediscovery of an ‘extinct’ Galápagos giant tortoise species

Ryan C. Garrick, Edgar Benavides, Michael Russello, James Gibbs, Nikos Poulakakis, Kirstin Dion, Chaz Hyseni, Brittney Kajdacsi, Lady Márquez, Sarah Bahan, Claudio Ciofi, Washington Tapia, Adalgisa Caccone, Kirstin B. Dion, James P. Gibbs & Michael A. Russello
Genes from recently extinct species can live on in the genomes of extant individuals of mixed ancestry. Recently, Poulakakis et al. detected genetic signatures of the giant Galápagos tortoise once endemic to Floreana Island (Chelonoidis elephantopus) within eleven hybrid individuals of otherwise pure C. becki on Volcano Wolf, Isabela Island. Movement of tortoises among islands by pirate and whaling ships was not uncommon during the 1800’s, representing a likely mechanism by which individuals from Floreana...

Registration Year

  • 2022
    1
  • 2021
    1
  • 2020
    1
  • 2019
    1
  • 2018
    4
  • 2017
    2
  • 2015
    1
  • 2014
    1
  • 2013
    1
  • 2011
    6

Resource Types

  • Dataset
    19

Affiliations

  • University of Crete
    19
  • Hellenic Centre for Marine Research
    4
  • University of British Columbia
    4
  • Yale University
    4
  • University of Lausanne
    3
  • State University of New York
    3
  • University of Patras
    2
  • National Institute of Oceanography
    2
  • Charles Darwin Foundation
    2
  • Leibniz Institute of Freshwater Ecology and Inland Fisheries
    2