Antarctic Tardigrada: a first step in understanding molecular operational taxonomic units (MOTUs) and biogeography of cryptic meiofauna

被引：35

作者：

Czechowski, Paul ^{[1
,2
,3
]}

Sands, Chester J. ^{[3
]}

Adams, Byron J. ^{[4
]}

D'Haese, Cyrille A. ^{[5
]}

Gibson, John A. E. ^{[6
]}

McInnes, Sandra J. ^{[3
]}

Stevens, Mark I. ^{[1
,7
]}

机构：

[1] Univ Adelaide, Sch Earth & Environm Sci, Adelaide, SA 5005, Australia

[2] Univ Leipzig, D-04103 Leipzig, Germany

[3] British Antarctic Survey, NERC, Cambridge CB3 0ET, England

[4] Brigham Young Univ, Dept Biol, Provo, UT 84602 USA

[5] Museum Natl Hist Nat, Dept Systemat & Evolut, CNRS, UMR Origine Struct & Evolut Biodiversite 7205, F-75231 Paris 05, France

[6] Univ Tasmania, Inst Marine & Antarct Studies, Hobart, Tas 7001, Australia

[7] S Australian Museum, Adelaide, SA 5000, Australia

来源：

INVERTEBRATE SYSTEMATICS | 2012年 / 26卷 / 5-6期

基金：

美国国家科学基金会;

关键词：

DRONNING-MAUD-LAND; MAXIMUM-LIKELIHOOD-ESTIMATION; VICTORIA LAND; SUBSTITUTION RATES; GLACIAL HISTORY; TERRESTRIAL; NEMATODES; DNA; DISPERSAL; MOUNTAINS;

D O I：

10.1071/IS12034

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Recent studies have suggested that some resident Antarctic biota are of ancient origin and may have been isolated for millions of years. The phylum Tardigrada, which is part of the Antarctic terrestrial meiofauna, is of particular interest due to an impressive array of biochemical abilities to withstand harsh environmental conditions. Tardigrades are one of the few widespread Antarctic terrestrial animals that have the potential to be used as a model for evolution and biogeography on the Antarctic continent. We isolated 126 individual tardigrades from four geographically isolated soil samples from two remote nunataks in the Sor Rondane Mountains, Dronning Maud Land, Antarctica. We examined genetic variation among individuals utilising three gene regions: cytochrome c oxidase subunit I gene (COI), 18S rDNA (18S), and the wingless (Wg) gene. Comparison of sequences from worldwide and Antarctic tardigrades indicated long-term survival and isolation over glacially dominated periods in ice-free habitats in the Sor Rondane Mountains.

引用

页码：526 / 538

页数：13

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