Amassing diversity in an ancient lake: evolution of a morphologically diverse parthenogenetic gastropod assemblage in Lake Malawi
Identifieur interne : 009211 ( Main/Exploration ); précédent : 009210; suivant : 009212Amassing diversity in an ancient lake: evolution of a morphologically diverse parthenogenetic gastropod assemblage in Lake Malawi
Auteurs : Martin J. Genner [Pays-Bas] ; Jonathan A. Todd ; Ellinor Michel ; Dirk Erpenbeck ; Abayomi Jimoh ; Domino A. Joyce ; Andrzej Piechocki ; Jean-Pierre Pointier [France]Source :
- Molecular Ecology [ 0962-1083 ] ; 2007-02.
Descripteurs français
English descriptors
- KwdEn :
- Aflp, Ancient lakes, Anomala, Authors journal compilation, Axial ribs, Bayesian, Bayesian inference, Biological journal, Biological sciences, Blackwell publishing, Cape maclear, Cichlid, Clade, Clonal, Clonal lineages, Clonal lines, Colour, Colour patterns, Congo basin, Congo drainage, Different morphs, Divergence, East africa, Ecology, Endemic, Facon, Fossil, Fossil calibrations, Freshwater, Gastropod, Genetic distance, Genetic similarity, Genner, Genus, Lake malawi, Lake mweru, Lake rukwa, Lake tanganyika, Last whorl, Lineage, Linnean society, Maclear, Malawi, Malawi basin, Maximum likelihood, Melanoides, Melanoides anomala, Melanoides mweruensis, Melanoides polymorpha, Melanoides tuberculata, Michel, Mitochondrial, Molecular ecology, Molecular phylogenetics, Mollusc, Molluscan studies, Morph, Morphological distance, Morphological diversity, Morphological similarity, Morphologically, Morphs, Mweruensis, Natural history museum, Nkhata, Node, Parthenogenetic, Parthenogenetic lineages, Phylogenetic, Phylogenetic analysis, Phylogeny, Pointier, Polymorpha, Polymorpha morphs, Primer, Primer pair, Rib, Samadi, Same morph, Sensu, Shell height, Shell morphology, Shell shape, Snail, Spiral grooves, Stricto, Suture, Sympatric, Sympatric morphs, Tanganyika, Tarebia, Tarebia granifera, Taxon, Thiaridae, Thiaridae sensu stricto, Tuberculata, Unconstrained tree, Upper suture, Water bodies, Water body, Whorl.
- Teeft :
- Aflp, Ancient lakes, Anomala, Authors journal compilation, Axial ribs, Bayesian, Bayesian inference, Biological journal, Biological sciences, Blackwell publishing, Cape maclear, Cichlid, Clade, Clonal, Clonal lineages, Clonal lines, Colour, Colour patterns, Congo basin, Congo drainage, Different morphs, Divergence, East africa, Ecology, Endemic, Facon, Fossil, Fossil calibrations, Freshwater, Gastropod, Genetic distance, Genetic similarity, Genner, Genus, Lake malawi, Lake mweru, Lake rukwa, Lake tanganyika, Last whorl, Lineage, Linnean society, Maclear, Malawi, Malawi basin, Maximum likelihood, Melanoides, Melanoides anomala, Melanoides mweruensis, Melanoides polymorpha, Melanoides tuberculata, Michel, Mitochondrial, Molecular ecology, Molecular phylogenetics, Mollusc, Molluscan studies, Morph, Morphological distance, Morphological diversity, Morphological similarity, Morphologically, Morphs, Mweruensis, Natural history museum, Nkhata, Node, Parthenogenetic, Parthenogenetic lineages, Phylogenetic, Phylogenetic analysis, Phylogeny, Pointier, Polymorpha, Polymorpha morphs, Primer, Primer pair, Rib, Samadi, Same morph, Sensu, Shell height, Shell morphology, Shell shape, Snail, Spiral grooves, Stricto, Suture, Sympatric, Sympatric morphs, Tanganyika, Tarebia, Tarebia granifera, Taxon, Thiaridae, Thiaridae sensu stricto, Tuberculata, Unconstrained tree, Upper suture, Water bodies, Water body, Whorl.
Abstract
Exceptional ecological niche diversity, clear waters and unique divergent selection pressures have often been invoked to explain high morphological and genetic diversity of taxa within ancient lakes. However, it is possible that in some ancient lake taxa high diversity has arisen because these historically stable environments have allowed accumulation of lineages over evolutionary timescales, a process impossible in neighbouring aquatic habitats undergoing desiccation and reflooding. Here we examined the evolution of a unique morphologically diverse assemblage of thiarid gastropods belonging to the Melanoides polymorpha‘complex’ in Lake Malawi. Using mitochondrial DNA sequences, we found this Lake Malawi complex was not monophyletic, instead sharing common ancestry with Melanoides anomala and Melanoides mweruensis from the Congo Basin. Fossil calibrations of molecular divergence placed the origins of this complex to within the last 4 million years. Nuclear amplified fragment length polymorphism markers revealed sympatric M. polymorpha morphs to be strongly genetically differentiated lineages, and males were absent from our samples indicating that reproduction is predominantly parthenogenetic. These results imply the presence of Lake Malawi as a standing water body over the last million years or more has facilitated accumulation of clonal morphological diversity, a process that has not taken place in more transient freshwater habitats. As such, the historical stability of aquatic environments may have been critical in determining present spatial distributions of biodiversity.
Url:
DOI: 10.1111/j.1365-294X.2006.03171.x
Affiliations:
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type="ISSN">0962-1083</idno><idno type="eISSN">1365-294X</idno><imprint><biblScope unit="vol">16</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="517">517</biblScope><biblScope unit="page" to="530">530</biblScope><biblScope unit="page-count">14</biblScope><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2007-02">2007-02</date></imprint><idno type="ISSN">0962-1083</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0962-1083</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aflp</term><term>Ancient lakes</term><term>Anomala</term><term>Authors journal compilation</term><term>Axial ribs</term><term>Bayesian</term><term>Bayesian inference</term><term>Biological journal</term><term>Biological sciences</term><term>Blackwell publishing</term><term>Cape maclear</term><term>Cichlid</term><term>Clade</term><term>Clonal</term><term>Clonal lineages</term><term>Clonal lines</term><term>Colour</term><term>Colour patterns</term><term>Congo basin</term><term>Congo drainage</term><term>Different morphs</term><term>Divergence</term><term>East africa</term><term>Ecology</term><term>Endemic</term><term>Facon</term><term>Fossil</term><term>Fossil calibrations</term><term>Freshwater</term><term>Gastropod</term><term>Genetic distance</term><term>Genetic similarity</term><term>Genner</term><term>Genus</term><term>Lake malawi</term><term>Lake mweru</term><term>Lake rukwa</term><term>Lake tanganyika</term><term>Last whorl</term><term>Lineage</term><term>Linnean society</term><term>Maclear</term><term>Malawi</term><term>Malawi basin</term><term>Maximum likelihood</term><term>Melanoides</term><term>Melanoides anomala</term><term>Melanoides mweruensis</term><term>Melanoides polymorpha</term><term>Melanoides tuberculata</term><term>Michel</term><term>Mitochondrial</term><term>Molecular ecology</term><term>Molecular phylogenetics</term><term>Mollusc</term><term>Molluscan studies</term><term>Morph</term><term>Morphological distance</term><term>Morphological diversity</term><term>Morphological similarity</term><term>Morphologically</term><term>Morphs</term><term>Mweruensis</term><term>Natural history museum</term><term>Nkhata</term><term>Node</term><term>Parthenogenetic</term><term>Parthenogenetic lineages</term><term>Phylogenetic</term><term>Phylogenetic analysis</term><term>Phylogeny</term><term>Pointier</term><term>Polymorpha</term><term>Polymorpha morphs</term><term>Primer</term><term>Primer pair</term><term>Rib</term><term>Samadi</term><term>Same morph</term><term>Sensu</term><term>Shell height</term><term>Shell morphology</term><term>Shell shape</term><term>Snail</term><term>Spiral grooves</term><term>Stricto</term><term>Suture</term><term>Sympatric</term><term>Sympatric morphs</term><term>Tanganyika</term><term>Tarebia</term><term>Tarebia granifera</term><term>Taxon</term><term>Thiaridae</term><term>Thiaridae sensu stricto</term><term>Tuberculata</term><term>Unconstrained tree</term><term>Upper suture</term><term>Water bodies</term><term>Water body</term><term>Whorl</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Aflp</term><term>Ancient lakes</term><term>Anomala</term><term>Authors journal compilation</term><term>Axial ribs</term><term>Bayesian</term><term>Bayesian inference</term><term>Biological journal</term><term>Biological sciences</term><term>Blackwell publishing</term><term>Cape maclear</term><term>Cichlid</term><term>Clade</term><term>Clonal</term><term>Clonal lineages</term><term>Clonal lines</term><term>Colour</term><term>Colour patterns</term><term>Congo basin</term><term>Congo drainage</term><term>Different morphs</term><term>Divergence</term><term>East africa</term><term>Ecology</term><term>Endemic</term><term>Facon</term><term>Fossil</term><term>Fossil calibrations</term><term>Freshwater</term><term>Gastropod</term><term>Genetic distance</term><term>Genetic similarity</term><term>Genner</term><term>Genus</term><term>Lake malawi</term><term>Lake mweru</term><term>Lake rukwa</term><term>Lake tanganyika</term><term>Last whorl</term><term>Lineage</term><term>Linnean society</term><term>Maclear</term><term>Malawi</term><term>Malawi basin</term><term>Maximum likelihood</term><term>Melanoides</term><term>Melanoides anomala</term><term>Melanoides mweruensis</term><term>Melanoides polymorpha</term><term>Melanoides tuberculata</term><term>Michel</term><term>Mitochondrial</term><term>Molecular ecology</term><term>Molecular phylogenetics</term><term>Mollusc</term><term>Molluscan studies</term><term>Morph</term><term>Morphological distance</term><term>Morphological diversity</term><term>Morphological similarity</term><term>Morphologically</term><term>Morphs</term><term>Mweruensis</term><term>Natural history museum</term><term>Nkhata</term><term>Node</term><term>Parthenogenetic</term><term>Parthenogenetic lineages</term><term>Phylogenetic</term><term>Phylogenetic analysis</term><term>Phylogeny</term><term>Pointier</term><term>Polymorpha</term><term>Polymorpha morphs</term><term>Primer</term><term>Primer pair</term><term>Rib</term><term>Samadi</term><term>Same morph</term><term>Sensu</term><term>Shell height</term><term>Shell morphology</term><term>Shell shape</term><term>Snail</term><term>Spiral grooves</term><term>Stricto</term><term>Suture</term><term>Sympatric</term><term>Sympatric morphs</term><term>Tanganyika</term><term>Tarebia</term><term>Tarebia granifera</term><term>Taxon</term><term>Thiaridae</term><term>Thiaridae sensu stricto</term><term>Tuberculata</term><term>Unconstrained tree</term><term>Upper suture</term><term>Water bodies</term><term>Water body</term><term>Whorl</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Malawi</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>écologie</term><term>Eau douce</term><term>Mollusque</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Exceptional ecological niche diversity, clear waters and unique divergent selection pressures have often been invoked to explain high morphological and genetic diversity of taxa within ancient lakes. However, it is possible that in some ancient lake taxa high diversity has arisen because these historically stable environments have allowed accumulation of lineages over evolutionary timescales, a process impossible in neighbouring aquatic habitats undergoing desiccation and reflooding. Here we examined the evolution of a unique morphologically diverse assemblage of thiarid gastropods belonging to the Melanoides polymorpha‘complex’ in Lake Malawi. Using mitochondrial DNA sequences, we found this Lake Malawi complex was not monophyletic, instead sharing common ancestry with Melanoides anomala and Melanoides mweruensis from the Congo Basin. Fossil calibrations of molecular divergence placed the origins of this complex to within the last 4 million years. Nuclear amplified fragment length polymorphism markers revealed sympatric M. polymorpha morphs to be strongly genetically differentiated lineages, and males were absent from our samples indicating that reproduction is predominantly parthenogenetic. These results imply the presence of Lake Malawi as a standing water body over the last million years or more has facilitated accumulation of clonal morphological diversity, a process that has not taken place in more transient freshwater habitats. As such, the historical stability of aquatic environments may have been critical in determining present spatial distributions of biodiversity.</div></front></TEI><affiliations><list><country><li>France</li><li>Pays-Bas</li></country><region><li>Hollande-Septentrionale</li></region><settlement><li>Amsterdam</li></settlement><orgName><li>Université d'Amsterdam</li></orgName></list><tree><noCountry><name sortKey="Erpenbeck, Dirk" sort="Erpenbeck, Dirk" uniqKey="Erpenbeck D" first="Dirk" last="Erpenbeck">Dirk Erpenbeck</name><name sortKey="Jimoh, Abayomi" sort="Jimoh, Abayomi" uniqKey="Jimoh A" first="Abayomi" last="Jimoh">Abayomi Jimoh</name><name sortKey="Joyce, Domino A" sort="Joyce, Domino A" uniqKey="Joyce D" first="Domino A." last="Joyce">Domino A. Joyce</name><name sortKey="Michel, Ellinor" sort="Michel, Ellinor" uniqKey="Michel E" first="Ellinor" last="Michel">Ellinor Michel</name><name sortKey="Piechocki, Andrzej" sort="Piechocki, Andrzej" uniqKey="Piechocki A" first="Andrzej" last="Piechocki">Andrzej Piechocki</name><name sortKey="Todd, Jonathan A" sort="Todd, Jonathan A" uniqKey="Todd J" first="Jonathan A." last="Todd">Jonathan A. Todd</name></noCountry><country name="Pays-Bas"><region name="Hollande-Septentrionale"><name sortKey="Genner, Martin J" sort="Genner, Martin J" uniqKey="Genner M" first="Martin J." last="Genner">Martin J. Genner</name></region></country><country name="France"><noRegion><name sortKey="Pointier, Jean Ierre" sort="Pointier, Jean Ierre" uniqKey="Pointier J" first="Jean-Pierre" last="Pointier">Jean-Pierre Pointier</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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