Different evolutionary histories in two sympatric limpets of the genus Nacella (Patellogastropoda) in the South-western Atlantic coast

The phylogeography of two sympatric Magellanic limpets of the genus Nacella was studied. The historical and contemporary processes underlying their intraspecific patterns in Argentina were inferred using the mitochondrial cytochrome oxidase I gene. Results indicate different evolutionary histories i...

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Bibliographic Details
Published in:Marine biology 2011-11, Vol.158 (11), p.2405-2418
Main Authors: de Aranzamendi, M. Carla, Bastida, Ricardo, Gardenal, Cristina N.
Format: Article
Language:English
Subjects:
Analysis
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Biomedical and Life Sciences
Climate change
Coasts
Evolution
Evolutionary biology
Freshwater & Marine Ecology
Fundamental and applied biological sciences. Psychology
Gene flow
Life Sciences
Marine
Marine & Freshwater Sciences
Marine biology
Microbiology
Mitochondria
Nacella deaurata
Oceanography
Original Paper
Patellogastropoda
Phylogenetics
Pleistocene
Population number
Sea water ecosystems
Synecology
Zoology
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Summary:The phylogeography of two sympatric Magellanic limpets of the genus Nacella was studied. The historical and contemporary processes underlying their intraspecific patterns in Argentina were inferred using the mitochondrial cytochrome oxidase I gene. Results indicate different evolutionary histories in the two species. A recent geographic and demographic expansion ~11,000 years ago, with absence of current genetic structuring, is proposed for Nacella magellanica . In contrast, the phylogeographic pattern showed noticeable phylogenetic and geographic discontinuities in Nacella deaurata ; slow continuous population size growth with current low levels of gene flow among its populations was also observed, indicating demographic equilibrium. The beginning of divergence between these closely related limpets was estimated at about 270,000 years ago with very little or none gene flow occurring after their splitting. These contrasting historic patterns could be related to distinctive responses to climate changes associated with Pleistocene glaciations, as a result of differences in their ecological traits.
ISSN:0025-3162
1432-1793
DOI:10.1007/s00227-011-1742-3