Iterative Evolution of Sympatric Seacow (Dugongidae, Sirenia) Assemblages during the Past ∼26 Million Years
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{"title"=>"Iterative evolution of sympatric seacow (Dugongidae, Sirenia) assemblages during the past ~26 million years", "type"=>"journal", "authors"=>[{"first_name"=>"Jorge", "last_name"=>"Velez-Juarbe", "scopus_author_id"=>"14044371000"}, {"first_name"=>"Daryl P.", "last_name"=>"Domning", "scopus_author_id"=>"6701547693"}, {"first_name"=>"Nicholas D.", "last_name"=>"Pyenson", "scopus_author_id"=>"8666464800"}], "year"=>2012, "source"=>"PLoS ONE", "identifiers"=>{"scopus"=>"2-s2.0-84856546255", "pmid"=>"22319622", "sgr"=>"84856546255", "doi"=>"10.1371/journal.pone.0031294", "isbn"=>"1932-6203 (Electronic)\\r1932-6203 (Linking)", "issn"=>"19326203", "pui"=>"364189170"}, "id"=>"c1265485-5f0b-32fe-9256-d9e935ae3f46", "abstract"=>"Extant sirenians show allopatric distributions throughout most of their range. However, their fossil record shows evidence of multispecies communities throughout most of the past ∼26 million years, in different oceanic basins. Morphological differences among co-occurring sirenian taxa suggest that resource partitioning played a role in structuring these communities. We examined body size and ecomorphological differences (e.g., rostral deflection and tusk morphology) among sirenian assemblages from the late Oligocene of Florida, early Miocene of India and early Pliocene of Mexico; each with three species of the family Dugongidae. Although overlapping in several ecomorphological traits, each assemblage showed at least one dominant trait in which coexisting species differed. Fossil sirenian occurrences occasionally are monotypic, but the assemblages analyzed herein show iterative evolution of multispecies communities, a phenomenon unparalleled in extant sirenian ecology. As primary consumers of seagrasses, these communities likely had a strong impact on past seagrass ecology and diversity, although the sparse fossil record of seagrasses limits direct comparisons. Nonetheless, our results provide robust support for previous suggestions that some sirenians in these extinct assemblages served as keystone species, controlling the dominance of climax seagrass species, permitting more taxonomically diverse seagrass beds (and sirenian communities) than many of those observed today.", "link"=>"http://www.mendeley.com/research/iterative-evolution-sympatric-seacow-dugongidae-sirenia-assemblages-during-past-26-million-years", "reader_count"=>72, "reader_count_by_academic_status"=>{"Unspecified"=>1, "Professor > Associate Professor"=>3, "Researcher"=>18, "Student > Doctoral Student"=>4, "Student > Ph. D. Student"=>13, "Student > Postgraduate"=>2, "Student > Master"=>12, "Other"=>4, "Student > Bachelor"=>10, "Lecturer"=>3, "Professor"=>2}, "reader_count_by_user_role"=>{"Unspecified"=>1, "Professor > Associate Professor"=>3, "Researcher"=>18, "Student > Doctoral Student"=>4, "Student > Ph. D. Student"=>13, "Student > Postgraduate"=>2, "Student > Master"=>12, "Other"=>4, "Student > Bachelor"=>10, "Lecturer"=>3, "Professor"=>2}, "reader_count_by_subject_area"=>{"Unspecified"=>1, "Environmental Science"=>4, "Biochemistry, Genetics and Molecular Biology"=>2, "Agricultural and Biological Sciences"=>46, "Arts and Humanities"=>3, "Earth and Planetary Sciences"=>16}, "reader_count_by_subdiscipline"=>{"Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>16}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>46}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>2}, "Unspecified"=>{"Unspecified"=>1}, "Environmental Science"=>{"Environmental Science"=>4}, "Arts and Humanities"=>{"Arts and Humanities"=>3}}, "reader_count_by_country"=>{"Canada"=>1, "Czech Republic"=>1, "Argentina"=>1, "Puerto Rico"=>1, "United States"=>4, "Norway"=>1, "United Kingdom"=>2, "Mexico"=>1, "Chile"=>2, "Germany"=>1}, "group_count"=>2}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/685626"], "description"=>"<p>Consensus tree (length = 127; ri = 0.758; ci = 0.527). Taxa included in this study are highlighted in color, as follows: green, early Pliocene of Mexico; red, early Miocene of India; blue, late Oligocene of Florida. Open circles identify node-based clades; arcs indicate stem-based taxa. The poorly integrated group “Halitheriinae” is paraphyletic in this study.</p>", "links"=>[], "tags"=>["phylogeny"], "article_id"=>356117, "categories"=>["Ecology", "Evolutionary Biology"], "users"=>["Jorge Velez-Juarbe", "Daryl P. Domning", "Nicholas D. Pyenson"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0031294.g003", "stats"=>{"downloads"=>4, "page_views"=>102, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Time_calibrated_phylogeny_of_Sirenia_/356117", "title"=>"Time-calibrated phylogeny of Sirenia.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-02-03 01:41:57"}
  • {"files"=>["https://ndownloader.figshare.com/files/685254"], "description"=>"<p>A) Fossil dugongids from the late Oligocene Parachucla Formation of Florida showing categories of upper incisor 1 alveolar size and depth (outlined in gray), compared to premaxillary symphysis length (dashed line denotes mid-length). <i>Metaxytherium</i> sp. based on UF 49051, <i>Crenatosiren olseni</i> and <i>Dioplotherium manigaulti</i> modified from Domning <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0031294#pone.0031294-Reinhart1\" target=\"_blank\">[9]</a> and <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0031294#pone.0031294-Morgan1\" target=\"_blank\">[8]</a>, respectively. B) Comparison of body sizes among dugongids used in this study. C) Fossil dugongids from the early Miocene Khari Nadi Formation of India showing differences in rostral deflection. Illustrations modified from <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0031294#pone.0031294-Edwards1\" target=\"_blank\">[10]</a>–<a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0031294#pone.0031294-Thewissen1\" target=\"_blank\">[12]</a>. D) Cross-sectional outline of incisors of fossil dugongids from the early Pliocene Carrillo Puerto Formation of Mexico. Skull of <i>Corystosiren varguezi</i> (modified from <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0031294#pone.0031294-Bajpai1\" target=\"_blank\">[11]</a>) shown to demonstrate tusk cross-section.</p>", "links"=>[], "tags"=>["taxa", "ecomorphological"], "article_id"=>355742, "categories"=>["Ecology", "Evolutionary Biology"], "users"=>["Jorge Velez-Juarbe", "Daryl P. Domning", "Nicholas D. Pyenson"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0031294.g001", "stats"=>{"downloads"=>2, "page_views"=>11, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Sirenian_taxa_and_ecomorphological_features_used_in_this_study_/355742", "title"=>"Sirenian taxa and ecomorphological features used in this study.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-02-03 01:35:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/685727"], "description"=>"a<p><b>Small</b>, length less than half the length of the premaxillary symphysis; <b>medium</b>, length about half the length of the premaxillary symphysis; <b>large</b>, length greater than half the length of the premaxillary symphysis.</p>b<p>Estimate based on condylobasal length of skull of 41.5 cm.</p>c<p>Based on <i>Nanosiren garciae</i> with which it shares similar dimensions of the mandible.</p>", "links"=>[], "tags"=>["sirenian", "taxa", "categorization", "corresponding", "ecomorphological"], "article_id"=>356212, "categories"=>["Ecology", "Evolutionary Biology"], "users"=>["Jorge Velez-Juarbe", "Daryl P. Domning", "Nicholas D. Pyenson"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0031294.t001", "stats"=>{"downloads"=>6, "page_views"=>8, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_List_of_sirenian_taxa_and_categorization_of_corresponding_ecomorphological_features_used_in_this_study_/356212", "title"=>"List of sirenian taxa and categorization of corresponding ecomorphological features used in this study.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2012-02-03 01:43:32"}
  • {"files"=>["https://ndownloader.figshare.com/files/685450"], "description"=>"<p>Clockwise from the top left, the geographic location of each assemblage is denoted by a gold star, and includes the following taxa, arranged from top to bottom in each spotlight: Florida: <i>Crenatosiren olseni</i>, <i>Metaxytherium</i> sp., and <i>Dioplotherium manigaulti</i>; India: <i>Bharatisiren kachchhensis</i>, <i>Kutchisiren cylindrica</i>, and <i>Domningia sodhae</i>; Mexico: <i>Corystosiren varguezi</i>, <i>Nanosiren</i> cf. <i>N. garciae</i>, and <i>Dioplotherium</i> sp., which is depicted feeding on seagrasses. Art by Carl Buell.</p>", "links"=>[], "tags"=>["reconstructions", "fossil", "dugongid", "assemblages", "india", "mexico"], "article_id"=>355930, "categories"=>["Ecology", "Evolutionary Biology"], "users"=>["Jorge Velez-Juarbe", "Daryl P. Domning", "Nicholas D. Pyenson"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0031294.g002", "stats"=>{"downloads"=>1, "page_views"=>35, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Illustration_showing_reconstructions_of_fossil_dugongid_assemblages_from_Florida_India_and_Mexico_during_the_past_8764_26_million_years_/355930", "title"=>"Illustration showing reconstructions of fossil dugongid assemblages from Florida, India and Mexico during the past ∼26 million years.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-02-03 01:38:50"}
  • {"files"=>["https://ndownloader.figshare.com/files/350226", "https://ndownloader.figshare.com/files/350263"], "description"=>"<div><p>Extant sirenians show allopatric distributions throughout most of their range. However, their fossil record shows evidence of multispecies communities throughout most of the past ∼26 million years, in different oceanic basins. Morphological differences among co-occurring sirenian taxa suggest that resource partitioning played a role in structuring these communities. We examined body size and ecomorphological differences (e.g., rostral deflection and tusk morphology) among sirenian assemblages from the late Oligocene of Florida, early Miocene of India and early Pliocene of Mexico; each with three species of the family Dugongidae. Although overlapping in several ecomorphological traits, each assemblage showed at least one dominant trait in which coexisting species differed. Fossil sirenian occurrences occasionally are monotypic, but the assemblages analyzed herein show iterative evolution of multispecies communities, a phenomenon unparalleled in extant sirenian ecology. As primary consumers of seagrasses, these communities likely had a strong impact on past seagrass ecology and diversity, although the sparse fossil record of seagrasses limits direct comparisons. Nonetheless, our results provide robust support for previous suggestions that some sirenians in these extinct assemblages served as keystone species, controlling the dominance of climax seagrass species, permitting more taxonomically diverse seagrass beds (and sirenian communities) than many of those observed today.</p> </div>", "links"=>[], "tags"=>["iterative", "sympatric", "seacow", "assemblages", "years"], "article_id"=>129226, "categories"=>["Ecology", "Evolutionary Biology"], "users"=>["Jorge Velez-Juarbe", "Daryl P. Domning", "Nicholas D. Pyenson"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0031294.s001", "https://dx.doi.org/10.1371/journal.pone.0031294.s002"], "stats"=>{"downloads"=>15, "page_views"=>10, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Iterative_Evolution_of_Sympatric_Seacow_Dugongidae_Sirenia_Assemblages_during_the_Past_26_Million_Years/129226", "title"=>"Iterative Evolution of Sympatric Seacow (Dugongidae, Sirenia) Assemblages during the Past ∼26 Million Years", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2012-02-03 02:33:46"}

PMC Usage Stats | Further Information

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Relative Metric

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