Global biogeography and evolution of Cuvierina pteropods

Shelled pteropods are planktonic gastropods that are potentially good indicators of the effects of ocean acidification. They also have high potential for the study of zooplankton evolution because they are metazoan plankton with a good fossil record. We investigated phenotypic and genetic variation...

Full description

Saved in:
Bibliographic Details
Published in:BMC evolutionary biology 2015-03, Vol.15 (1), p.39-39, Article 39
Main Authors: Burridge, Alice K, Goetze, Erica, Raes, Niels, Huisman, Jef, Peijnenburg, Katja T C A
Format: Article
Language:English
Subjects:
Analysis
Animal Shells - anatomy & histology
Animals
Biological Evolution
DNA sequencing
Ecosystem
Fossils
Gastropoda - anatomy & histology
Gastropoda - classification
Gastropoda - genetics
Genetic aspects
Genetic Variation
Hydrogen-Ion Concentration
Molecular Sequence Data
Nucleotide sequencing
Ocean acidification
Oceans and Seas
Phylogeny
Physiological aspects
Salinity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Shelled pteropods are planktonic gastropods that are potentially good indicators of the effects of ocean acidification. They also have high potential for the study of zooplankton evolution because they are metazoan plankton with a good fossil record. We investigated phenotypic and genetic variation in pteropods belonging to the genus Cuvierina in relation to their biogeographic distribution across the world's oceans. We aimed to assess species boundaries and to reconstruct their evolutionary history. We distinguished six morphotypes based on geometric morphometric analyses of shells from 926 museum and 113 fresh specimens. These morphotypes have distinct geographic distributions across the Atlantic, Pacific and Indian oceans, and belong to three major genetic clades based on COI and 28S DNA sequence data. Using a fossil-calibrated phylogeny, we estimated that these clades separated in the Late Oligocene and Early to Middle Miocene. We found evidence for ecological differentiation among all morphotypes based on ecological niche modelling with sea surface temperature, salinity and phytoplankton biomass as primary determinants. Across all analyses, we found highly congruent patterns of differentiation suggesting species level divergences between morphotypes. However, we also found distinct morphotypes (e.g. in the Atlantic Ocean) that were ecologically, but not genetically differentiated. Given the distinct ecological and phenotypic specializations found among both described and undescribed Cuvierina taxa, they may not respond equally to future ocean changes and may not be equally sensitive to ocean acidification. Our findings support the view that ecological differentiation may be an important driving force in the speciation of zooplankton.
ISSN:1471-2148
1471-2148
DOI:10.1186/s12862-015-0310-8