Temperature-related activity of Gomphiocephalus hodgsoni (Co
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TitleTemperature-related activity of Gomphiocephalus hodgsoni (Collembola) mitochondrial DNA (COI) haplotypes in Taylor Valley, AntarcticaAbstractGomphiocephalus hodgsoni (Collembola) is the most common and widely distributed arthropod in the Dry Valleys of southern Victoria Land, and is genetically diverse with over 70 mitochondrial cytochrome c oxidase subunit I (COI) haplotypes. There is also considerable physiological variation among G. hodgsoni individuals in their cold tolerance and metabolic activity. Here, we assessed genetic haplotypes of G. hodgsoni relative to the environmental conditions during which individuals were active. We sequenced the COI region of 151 individuals collected in pitfall traps from three sites within Taylor Valley and found 19 unique haplotypes that separated into two distinct lineages (1.6 percent divergence), with one lineage comprising 80 percent of the sequenced population. During two-hourly sampling, air temperature was the strongest predictor of activity between the two lineages (R20Ì….56), and when combined with subsurface soil temperature, relative humidity and photosynthetically active radiation, explanatory power increased to R20Ì….71. With steadily increasing air temperatures predicted for much of Antarctica, it is likely that some haplotypes will have a selective advantage and potentially result in decreased genetic variability within populations. We suggest that temporal monitoring of the relative proportions of COI haplotypes or other appropriate genetic markers may provide a subtle measure of biological responses to environmental changes within Antarctic terrestrial ecosystems. Copyright 2015, Springer-Verlag Berlin Heidelberg.AcknowledgementsWe are extremely grateful to three anonymous reviewers for their thoughtful and constructive comments which improved the manuscript. Sequencing at the University of Waikato was financed by the International Centre for Terrestrial Antarctic Research (ICTAR) and funding from the Government of Canada through the Ontario Genomics Institute and Genome Canada supporting sequencing at the CCDB at the University of Guelph. We thank Antarctica New Zealand staff at Scott Base and Christchurch for their field and logistic support. Financial support of G.C. was provided by the ICTAR Young Investigator Award and the Environmental Research Institute Masters Research Scholarship. C. Lee, C. Cary, J. Sohm, U. Nielsen, B. Adams and D. Wall provided valuable advice and support in Antarctica.
TypeArticleCitationCollins, G. and Hogg, I. (2016). Temperature-related activity of Gomphiocephalus hodgsoni (Collembola) mitochondrial DNA (COI) haplotypes in Taylor Valley, Antarctica. Polar Biology, 39(2): 379-389
Antarctica NZ (29th Nov 2018). Temperature-related activity of Gomphiocephalus hodgsoni (Co . In Website Antarctica NZ. Retrieved 5th Mar 2021 22:24, from https://adam.antarcticanz.govt.nz/nodes/view/63440