The Experts below are selected from a list of 10806 Experts worldwide ranked by ideXlab platform
Alexandra Anhthu Weber - One of the best experts on this subject based on the ideXlab platform.
-
influence of the larval phase on connectivity strong differences in the genetic structure of brooders and Broadcasters in the ophioderma longicauda species complex
Molecular Ecology, 2015Co-Authors: Alexandra Anhthu Weber, Sophie Valiere, Bastien Mérigot, Anne ChenuilAbstract:Closely related species with divergent life history traits are excellent models to infer the role of such traits in genetic diversity and connectivity. Ophioderma longicauda is a brittle star species complex composed of different genetic clusters, including brooders and Broadcasters. These species diverged very recently and some of them are sympatric and ecologically syntopic, making them particularly suitable to study the consequences of their trait differences. At the scale of the geographic distribution of the Broadcasters (Mediterranean Sea and northeastern Atlantic), we sequenced the mitochondrial marker COI and genotyped an intron (i51) for 788 individuals. In addition, we sequenced 10 nuclear loci newly developed from transcriptome sequences, for six sympatric populations of brooders and Broadcasters from Greece. At the large scale, we found a high genetic structure within the brooders (COI: 0.07 \textless F-ST \textless 0.65) and no polymorphism at the nuclear locus i51. In contrast, the Broadcasters displayed lower genetic structure (0 \textless F-ST \textless 0.14) and were polymorphic at locus i51. At the regional scale, the multilocus analysis confirmed the contrasting genetic structure between species, with no structure in the Broadcasters (global F-ST \textless 0.001) and strong structure in the brooders (global F-ST = 0.49), and revealed a higher genetic diversity in Broadcasters. Our study showed that the lecithotrophic larval stage allows on average a 50-fold increase in migration rates, a 280-fold increase in effective size and a threefold to fourfold increase in genetic diversity. Our work, investigating complementary genetic markers on sympatric and syntopic taxa, highlights the strong impact of the larval phase on connectivity and genetic diversity.
-
influence of the larval phase on connectivity strong differences in the genetic structure of brooders and Broadcasters in the ophioderma longicauda species complex
Molecular Ecology, 2015Co-Authors: Alexandra Anhthu Weber, Sophie Valiere, Bastien Mérigot, Anne ChenuilAbstract:Closely related species with divergent life history traits are excellent models to infer the role of such traits in genetic diversity and connectivity. Ophioderma longicauda is a brittle star species complex composed of different genetic clusters, including brooders and Broadcasters. These species diverged very recently and some of them are sympatric and ecologically syntopic, making them particularly suitable to study the consequences of their trait differences. At the scale of the geographic distribution of the Broadcasters (Mediterranean Sea and northeastern Atlantic), we sequenced the mitochondrial marker COI and genotyped an intron (i51) for 788 individuals. In addition, we sequenced 10 nuclear loci newly developed from transcriptome sequences, for six sympatric populations of brooders and Broadcasters from Greece. At the large scale, we found a high genetic structure within the brooders (COI: 0.07 < F(ST) < 0.65) and no polymorphism at the nuclear locus i51. In contrast, the Broadcasters displayed lower genetic structure (0 < F(ST) < 0.14) and were polymorphic at locus i51. At the regional scale, the multilocus analysis confirmed the contrasting genetic structure between species, with no structure in the Broadcasters (global F(ST) < 0.001) and strong structure in the brooders (global F(ST) = 0.49), and revealed a higher genetic diversity in Broadcasters. Our study showed that the lecithotrophic larval stage allows on average a 50-fold increase in migration rates, a 280-fold increase in effective size and a threefold to fourfold increase in genetic diversity. Our work, investigating complementary genetic markers on sympatric and syntopic taxa, highlights the strong impact of the larval phase on connectivity and genetic diversity.
Anne Chenuil - One of the best experts on this subject based on the ideXlab platform.
-
influence of the larval phase on connectivity strong differences in the genetic structure of brooders and Broadcasters in the ophioderma longicauda species complex
Molecular Ecology, 2015Co-Authors: Alexandra Anhthu Weber, Sophie Valiere, Bastien Mérigot, Anne ChenuilAbstract:Closely related species with divergent life history traits are excellent models to infer the role of such traits in genetic diversity and connectivity. Ophioderma longicauda is a brittle star species complex composed of different genetic clusters, including brooders and Broadcasters. These species diverged very recently and some of them are sympatric and ecologically syntopic, making them particularly suitable to study the consequences of their trait differences. At the scale of the geographic distribution of the Broadcasters (Mediterranean Sea and northeastern Atlantic), we sequenced the mitochondrial marker COI and genotyped an intron (i51) for 788 individuals. In addition, we sequenced 10 nuclear loci newly developed from transcriptome sequences, for six sympatric populations of brooders and Broadcasters from Greece. At the large scale, we found a high genetic structure within the brooders (COI: 0.07 \textless F-ST \textless 0.65) and no polymorphism at the nuclear locus i51. In contrast, the Broadcasters displayed lower genetic structure (0 \textless F-ST \textless 0.14) and were polymorphic at locus i51. At the regional scale, the multilocus analysis confirmed the contrasting genetic structure between species, with no structure in the Broadcasters (global F-ST \textless 0.001) and strong structure in the brooders (global F-ST = 0.49), and revealed a higher genetic diversity in Broadcasters. Our study showed that the lecithotrophic larval stage allows on average a 50-fold increase in migration rates, a 280-fold increase in effective size and a threefold to fourfold increase in genetic diversity. Our work, investigating complementary genetic markers on sympatric and syntopic taxa, highlights the strong impact of the larval phase on connectivity and genetic diversity.
-
influence of the larval phase on connectivity strong differences in the genetic structure of brooders and Broadcasters in the ophioderma longicauda species complex
Molecular Ecology, 2015Co-Authors: Alexandra Anhthu Weber, Sophie Valiere, Bastien Mérigot, Anne ChenuilAbstract:Closely related species with divergent life history traits are excellent models to infer the role of such traits in genetic diversity and connectivity. Ophioderma longicauda is a brittle star species complex composed of different genetic clusters, including brooders and Broadcasters. These species diverged very recently and some of them are sympatric and ecologically syntopic, making them particularly suitable to study the consequences of their trait differences. At the scale of the geographic distribution of the Broadcasters (Mediterranean Sea and northeastern Atlantic), we sequenced the mitochondrial marker COI and genotyped an intron (i51) for 788 individuals. In addition, we sequenced 10 nuclear loci newly developed from transcriptome sequences, for six sympatric populations of brooders and Broadcasters from Greece. At the large scale, we found a high genetic structure within the brooders (COI: 0.07 < F(ST) < 0.65) and no polymorphism at the nuclear locus i51. In contrast, the Broadcasters displayed lower genetic structure (0 < F(ST) < 0.14) and were polymorphic at locus i51. At the regional scale, the multilocus analysis confirmed the contrasting genetic structure between species, with no structure in the Broadcasters (global F(ST) < 0.001) and strong structure in the brooders (global F(ST) = 0.49), and revealed a higher genetic diversity in Broadcasters. Our study showed that the lecithotrophic larval stage allows on average a 50-fold increase in migration rates, a 280-fold increase in effective size and a threefold to fourfold increase in genetic diversity. Our work, investigating complementary genetic markers on sympatric and syntopic taxa, highlights the strong impact of the larval phase on connectivity and genetic diversity.
Sophie Valiere - One of the best experts on this subject based on the ideXlab platform.
-
influence of the larval phase on connectivity strong differences in the genetic structure of brooders and Broadcasters in the ophioderma longicauda species complex
Molecular Ecology, 2015Co-Authors: Alexandra Anhthu Weber, Sophie Valiere, Bastien Mérigot, Anne ChenuilAbstract:Closely related species with divergent life history traits are excellent models to infer the role of such traits in genetic diversity and connectivity. Ophioderma longicauda is a brittle star species complex composed of different genetic clusters, including brooders and Broadcasters. These species diverged very recently and some of them are sympatric and ecologically syntopic, making them particularly suitable to study the consequences of their trait differences. At the scale of the geographic distribution of the Broadcasters (Mediterranean Sea and northeastern Atlantic), we sequenced the mitochondrial marker COI and genotyped an intron (i51) for 788 individuals. In addition, we sequenced 10 nuclear loci newly developed from transcriptome sequences, for six sympatric populations of brooders and Broadcasters from Greece. At the large scale, we found a high genetic structure within the brooders (COI: 0.07 \textless F-ST \textless 0.65) and no polymorphism at the nuclear locus i51. In contrast, the Broadcasters displayed lower genetic structure (0 \textless F-ST \textless 0.14) and were polymorphic at locus i51. At the regional scale, the multilocus analysis confirmed the contrasting genetic structure between species, with no structure in the Broadcasters (global F-ST \textless 0.001) and strong structure in the brooders (global F-ST = 0.49), and revealed a higher genetic diversity in Broadcasters. Our study showed that the lecithotrophic larval stage allows on average a 50-fold increase in migration rates, a 280-fold increase in effective size and a threefold to fourfold increase in genetic diversity. Our work, investigating complementary genetic markers on sympatric and syntopic taxa, highlights the strong impact of the larval phase on connectivity and genetic diversity.
-
influence of the larval phase on connectivity strong differences in the genetic structure of brooders and Broadcasters in the ophioderma longicauda species complex
Molecular Ecology, 2015Co-Authors: Alexandra Anhthu Weber, Sophie Valiere, Bastien Mérigot, Anne ChenuilAbstract:Closely related species with divergent life history traits are excellent models to infer the role of such traits in genetic diversity and connectivity. Ophioderma longicauda is a brittle star species complex composed of different genetic clusters, including brooders and Broadcasters. These species diverged very recently and some of them are sympatric and ecologically syntopic, making them particularly suitable to study the consequences of their trait differences. At the scale of the geographic distribution of the Broadcasters (Mediterranean Sea and northeastern Atlantic), we sequenced the mitochondrial marker COI and genotyped an intron (i51) for 788 individuals. In addition, we sequenced 10 nuclear loci newly developed from transcriptome sequences, for six sympatric populations of brooders and Broadcasters from Greece. At the large scale, we found a high genetic structure within the brooders (COI: 0.07 < F(ST) < 0.65) and no polymorphism at the nuclear locus i51. In contrast, the Broadcasters displayed lower genetic structure (0 < F(ST) < 0.14) and were polymorphic at locus i51. At the regional scale, the multilocus analysis confirmed the contrasting genetic structure between species, with no structure in the Broadcasters (global F(ST) < 0.001) and strong structure in the brooders (global F(ST) = 0.49), and revealed a higher genetic diversity in Broadcasters. Our study showed that the lecithotrophic larval stage allows on average a 50-fold increase in migration rates, a 280-fold increase in effective size and a threefold to fourfold increase in genetic diversity. Our work, investigating complementary genetic markers on sympatric and syntopic taxa, highlights the strong impact of the larval phase on connectivity and genetic diversity.
Bastien Mérigot - One of the best experts on this subject based on the ideXlab platform.
-
influence of the larval phase on connectivity strong differences in the genetic structure of brooders and Broadcasters in the ophioderma longicauda species complex
Molecular Ecology, 2015Co-Authors: Alexandra Anhthu Weber, Sophie Valiere, Bastien Mérigot, Anne ChenuilAbstract:Closely related species with divergent life history traits are excellent models to infer the role of such traits in genetic diversity and connectivity. Ophioderma longicauda is a brittle star species complex composed of different genetic clusters, including brooders and Broadcasters. These species diverged very recently and some of them are sympatric and ecologically syntopic, making them particularly suitable to study the consequences of their trait differences. At the scale of the geographic distribution of the Broadcasters (Mediterranean Sea and northeastern Atlantic), we sequenced the mitochondrial marker COI and genotyped an intron (i51) for 788 individuals. In addition, we sequenced 10 nuclear loci newly developed from transcriptome sequences, for six sympatric populations of brooders and Broadcasters from Greece. At the large scale, we found a high genetic structure within the brooders (COI: 0.07 \textless F-ST \textless 0.65) and no polymorphism at the nuclear locus i51. In contrast, the Broadcasters displayed lower genetic structure (0 \textless F-ST \textless 0.14) and were polymorphic at locus i51. At the regional scale, the multilocus analysis confirmed the contrasting genetic structure between species, with no structure in the Broadcasters (global F-ST \textless 0.001) and strong structure in the brooders (global F-ST = 0.49), and revealed a higher genetic diversity in Broadcasters. Our study showed that the lecithotrophic larval stage allows on average a 50-fold increase in migration rates, a 280-fold increase in effective size and a threefold to fourfold increase in genetic diversity. Our work, investigating complementary genetic markers on sympatric and syntopic taxa, highlights the strong impact of the larval phase on connectivity and genetic diversity.
-
influence of the larval phase on connectivity strong differences in the genetic structure of brooders and Broadcasters in the ophioderma longicauda species complex
Molecular Ecology, 2015Co-Authors: Alexandra Anhthu Weber, Sophie Valiere, Bastien Mérigot, Anne ChenuilAbstract:Closely related species with divergent life history traits are excellent models to infer the role of such traits in genetic diversity and connectivity. Ophioderma longicauda is a brittle star species complex composed of different genetic clusters, including brooders and Broadcasters. These species diverged very recently and some of them are sympatric and ecologically syntopic, making them particularly suitable to study the consequences of their trait differences. At the scale of the geographic distribution of the Broadcasters (Mediterranean Sea and northeastern Atlantic), we sequenced the mitochondrial marker COI and genotyped an intron (i51) for 788 individuals. In addition, we sequenced 10 nuclear loci newly developed from transcriptome sequences, for six sympatric populations of brooders and Broadcasters from Greece. At the large scale, we found a high genetic structure within the brooders (COI: 0.07 < F(ST) < 0.65) and no polymorphism at the nuclear locus i51. In contrast, the Broadcasters displayed lower genetic structure (0 < F(ST) < 0.14) and were polymorphic at locus i51. At the regional scale, the multilocus analysis confirmed the contrasting genetic structure between species, with no structure in the Broadcasters (global F(ST) < 0.001) and strong structure in the brooders (global F(ST) = 0.49), and revealed a higher genetic diversity in Broadcasters. Our study showed that the lecithotrophic larval stage allows on average a 50-fold increase in migration rates, a 280-fold increase in effective size and a threefold to fourfold increase in genetic diversity. Our work, investigating complementary genetic markers on sympatric and syntopic taxa, highlights the strong impact of the larval phase on connectivity and genetic diversity.
Karen Donders - One of the best experts on this subject based on the ideXlab platform.
-
decline and fall of public service media values in the international content acquisition market an analysis of small public Broadcasters acquiring bbc worldwide content
European Journal of Communication, 2016Co-Authors: Karen Donders, Hilde Van Den BulckAbstract:Taking the case of the relationship between small European public Broadcasters and the international content sales activities of BBC Worldwide, this contribution analyses if and to what extent the commercial arm of public service media institution BBC is strengthening the hegemonic position of Anglo-Saxon content in European media markets, and undermining the objectives public Broadcasters stand for. To this end, it takes a comparative approach, combining and triangulating results from analysis of relevant documents, from BBC Worldwide and from public Broadcasters that acquire their programmes, with data from semi-structured expert interviews with representatives from small European public Broadcasters’ acquisition departments. Results indicate that, despite its public service claims, BBC Worldwide is an international content distributor like any other and that its activities contribute to cultural homogenization of audiovisual content in Europe, thus limiting small European public Broadcasters’ possibili...
-
government intervention in marriages of convenience between tv Broadcasters and distributors
Javnost-the Public, 2014Co-Authors: Karen Donders, Tom EvensAbstract:AbstractAlbeit largely neglected in communication sciences research, industrial convergence has put the relation between legacy content media like TV Broadcasters and distributors (cable, satellite) firmly on the policy agenda. There seems to be an increasing awareness of the gatekeeping characteristics of mainstream as well as online video distribution, and the power distributors can exert vis-a-vis television Broadcasters in terms of the bundling of services and pricing. The relation between TV Broadcasters and distributors is increasingly characterised by conflicts. Because of public disputes between Broadcasters and distributors, and threats of blackout, several governments across Europe are indeed discussing the necessity of regulatory intervention in order to decrease tension and promote cooperation in their media sectors. The article therefore questions how Broadcasters have problematised their relation with distributors and put it on the policy agenda, whether it is up to governments to intervene ...
-
of discourses stakeholders and advocacy coalitions in media policy tracing negotiations towards the new management contract of flemish public Broadcaster vrt
European Journal of Communication, 2014Co-Authors: Hilde Van Den Bulck, Karen DondersAbstract:Taking the run-up to the 2012–2016 management contract between Flemish public service Broadcaster VRT and the Flemish government as a case study, this article analyses the role of the digital techn...
