Skip to main content

IMIS

A new integrated search interface will become available in the next phase of marineinfo.org.
For the time being, please use IMIS to search available data

 

[ report an error in this record ]basket (0): add | show Print this page

Spatiotemporal analysis of population genetic structure in Geomonhystera disjuncta (Nematoda, Monhysteridae) reveals high levels of molecular diversity
Derycke, S.; Backeljau, T.; Vlaeminck, C.; Vierstraete, A.; Vanfleteren, J.; Vincx, M.; Moens, T. (2007). Spatiotemporal analysis of population genetic structure in Geomonhystera disjuncta (Nematoda, Monhysteridae) reveals high levels of molecular diversity. Mar. Biol. (Berl.) 151(5): 1799-1812. http://dx.doi.org/10.1007/s00227-007-0609-0
In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine/Coastal

Authors  Top 

Abstract
    Species identification in the phylum Nematoda is complicated due to the paucity of easily obtainable diagnostic morphological features. Furthermore, the cosmopolitan distribution of several species despite low dispersal abilities makes cryptic diversity potentially substantial within this phylum. We conducted a population genetic survey in the marine nematode Geomonhystera disjuncta in Belgium and The Netherlands in two seasons. The mitochondrial cytochrome oxidase c subunit 1 (COI) gene was screened with the single-strand conformation polymorphism method in 759 individuals. The 43 haplotypes were grouped into five lineages, with low divergences within (<3%) and high divergences between lineages (>14%). Analysis of the nuclear ITS region yielded concordant tree topologies, indicating the presence of five cryptic taxa within G. disjuncta. Analysis of Molecular Variance (AMOVA) illustrated a significant structuring in all lineages and temporal fluctuations in haplotype frequencies within and between locations. Metapopulation dynamics and/or priority effects best explained this structuring. Finally, our data indicate that the COI gene may be useful for DNA barcoding purposes.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors