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SPECIATION IN ANCIENT CRYPTIC SPECIES COMPLEXES: EVIDENCE FROM THE MOLECULAR PHYLOGENY OF BRACHIONUS PLICATILIS (ROTIFERA)

Continental lake-dwelling zooplanktonic organisms have long been considered cosmopolitan species with little geographic variation in spite of the isolation of their habitats. Evidence of morphological cohesiveness and high dispersal capabilities support this interpretation. However, this view has be... Full description

Journal Title: Evolution 2002, Vol.56 (7), p.1431-1444
Main Author: Gómez, Africa
Other Authors: Serra, Manuel , Carvalho, Gary R. , Lunt, David H.
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: Oxford, UK: Blackwell Publishing Ltd
ID: ISSN: 0014-3820
Link: https://www.ncbi.nlm.nih.gov/pubmed/12206243
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title: SPECIATION IN ANCIENT CRYPTIC SPECIES COMPLEXES: EVIDENCE FROM THE MOLECULAR PHYLOGENY OF BRACHIONUS PLICATILIS (ROTIFERA)
format: Article
creator:
  • Gómez, Africa
  • Serra, Manuel
  • Carvalho, Gary R.
  • Lunt, David H.
subjects:
  • Analysis
  • Animals
  • Biological taxonomies
  • Cytochrome oxidase I
  • DNA, Helminth - analysis
  • DNA, Intergenic - genetics
  • DNA, Mitochondrial - genetics
  • Ecological genetics
  • Eggs
  • Evolution
  • Evolution, Molecular
  • Evolutionary genetics
  • Genetic aspects
  • Genetic research
  • Genetic Variation
  • Genetics
  • Internal transcribed spacer 1
  • Mitochondria
  • mitochondrial DNA
  • Molecules
  • Nucleotides
  • passive dispersal
  • Phylogenetics
  • Phylogeny
  • Plankton
  • Rotifera
  • Rotifera - classification
  • Rotifera - enzymology
  • Rotifera - genetics
  • sibling species
  • Speciation
  • Species
  • Sympatric species
  • Taxa
  • zooplankton
ispartof: Evolution, 2002, Vol.56 (7), p.1431-1444
description: Continental lake-dwelling zooplanktonic organisms have long been considered cosmopolitan species with little geographic variation in spite of the isolation of their habitats. Evidence of morphological cohesiveness and high dispersal capabilities support this interpretation. However, this view has been challenged recently as many such species have been shown either to comprise cryptic species complexes or to exhibit marked population genetic differentiation and strong phylogeographic structuring at a regional scale. Here we investigate the molecular phylogeny of the cosmopolitan passively dispersing rotifer Brachionus plicatilis (Rotifera: Monogononta) species complex using nucleotide sequence variation from both nuclear (ribosomal internal transcribed spacer 1, ITS1) and mitochondrial (cytochrome c oxidase subunit I, COI) genes. Analysis of rotifer resting eggs from 27 salt lakes in the Iberian Peninsula plus lakes from four continents revealed nine genetically divergent lineages. The high level of sequence divergence, absence of hybridization, and extensive sympatry observed support the specifie status of these lineages. Sequence divergence estimates indicate that the B. plicatilis complex began diversifying many millions of years ago, yet has showed relatively high levels of morphological stasis. We discuss these results in relation to the ecology and genetics of aquatic invertebrates possessing dispersive resting propagules and address the apparent contradiction between zooplanktonic population structure and their morphological stasis.
language: eng
source:
identifier: ISSN: 0014-3820
fulltext: no_fulltext
issn:
  • 0014-3820
  • 1558-5646
url: Link


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titleSPECIATION IN ANCIENT CRYPTIC SPECIES COMPLEXES: EVIDENCE FROM THE MOLECULAR PHYLOGENY OF BRACHIONUS PLICATILIS (ROTIFERA)
creatorGómez, Africa ; Serra, Manuel ; Carvalho, Gary R. ; Lunt, David H.
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descriptionContinental lake-dwelling zooplanktonic organisms have long been considered cosmopolitan species with little geographic variation in spite of the isolation of their habitats. Evidence of morphological cohesiveness and high dispersal capabilities support this interpretation. However, this view has been challenged recently as many such species have been shown either to comprise cryptic species complexes or to exhibit marked population genetic differentiation and strong phylogeographic structuring at a regional scale. Here we investigate the molecular phylogeny of the cosmopolitan passively dispersing rotifer Brachionus plicatilis (Rotifera: Monogononta) species complex using nucleotide sequence variation from both nuclear (ribosomal internal transcribed spacer 1, ITS1) and mitochondrial (cytochrome c oxidase subunit I, COI) genes. Analysis of rotifer resting eggs from 27 salt lakes in the Iberian Peninsula plus lakes from four continents revealed nine genetically divergent lineages. The high level of sequence divergence, absence of hybridization, and extensive sympatry observed support the specifie status of these lineages. Sequence divergence estimates indicate that the B. plicatilis complex began diversifying many millions of years ago, yet has showed relatively high levels of morphological stasis. We discuss these results in relation to the ecology and genetics of aquatic invertebrates possessing dispersive resting propagules and address the apparent contradiction between zooplanktonic population structure and their morphological stasis.
editionReceived March 7, 2002. Accepted April 7, 2002.
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subjectAnalysis ; Animals ; Biological taxonomies ; Cytochrome oxidase I ; DNA, Helminth - analysis ; DNA, Intergenic - genetics ; DNA, Mitochondrial - genetics ; Ecological genetics ; Eggs ; Evolution ; Evolution, Molecular ; Evolutionary genetics ; Genetic aspects ; Genetic research ; Genetic Variation ; Genetics ; Internal transcribed spacer 1 ; Mitochondria ; mitochondrial DNA ; Molecules ; Nucleotides ; passive dispersal ; Phylogenetics ; Phylogeny ; Plankton ; Rotifera ; Rotifera - classification ; Rotifera - enzymology ; Rotifera - genetics ; sibling species ; Speciation ; Species ; Sympatric species ; Taxa ; zooplankton
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4DNA, Helminth - analysis
5DNA, Intergenic - genetics
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11Evolutionary genetics
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titleSPECIATION IN ANCIENT CRYPTIC SPECIES COMPLEXES: EVIDENCE FROM THE MOLECULAR PHYLOGENY OF BRACHIONUS PLICATILIS (ROTIFERA)
authorGómez, Africa ; Serra, Manuel ; Carvalho, Gary R. ; Lunt, David H.
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22Phylogenetics
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27Rotifera - enzymology
28Rotifera - genetics
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30Speciation
31Species
32Sympatric species
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abstractContinental lake-dwelling zooplanktonic organisms have long been considered cosmopolitan species with little geographic variation in spite of the isolation of their habitats. Evidence of morphological cohesiveness and high dispersal capabilities support this interpretation. However, this view has been challenged recently as many such species have been shown either to comprise cryptic species complexes or to exhibit marked population genetic differentiation and strong phylogeographic structuring at a regional scale. Here we investigate the molecular phylogeny of the cosmopolitan passively dispersing rotifer Brachionus plicatilis (Rotifera: Monogononta) species complex using nucleotide sequence variation from both nuclear (ribosomal internal transcribed spacer 1, ITS1) and mitochondrial (cytochrome c oxidase subunit I, COI) genes. Analysis of rotifer resting eggs from 27 salt lakes in the Iberian Peninsula plus lakes from four continents revealed nine genetically divergent lineages. The high level of sequence divergence, absence of hybridization, and extensive sympatry observed support the specifie status of these lineages. Sequence divergence estimates indicate that the B. plicatilis complex began diversifying many millions of years ago, yet has showed relatively high levels of morphological stasis. We discuss these results in relation to the ecology and genetics of aquatic invertebrates possessing dispersive resting propagules and address the apparent contradiction between zooplanktonic population structure and their morphological stasis.
copOxford, UK
pubBlackwell Publishing Ltd
pmid12206243
doi10.1111/j.0014-3820.2002.tb01455.x
tpages14
editionReceived March 7, 2002. Accepted April 7, 2002.