Phylogeography recapitulates topography

Very fine-scale local endemism of a saproxylic 'giant' springtail at Tallaganda in the Great Dividing Range of south-east Australia

R. C. Garrick*, C. J. Sands, D. M. Rowell, N. N. Tait, P. Greenslade, P. Sunnucks

*Corresponding author for this work

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

Comparative phylogeography can reveal processes and historical events that shape the biodiversity of species and communities. As part of a comparative research program, the phylogeography of a new, endemic Australian genus and species of log-dependent (saproxylic) collembola was investigated using mitochondrial sequences, allozymes and anonymous single-copy nuclear markers. We found the genetic structure of the species corresponds with five a priori microbiogeographical regions, with population subdivision at various depths owing to palaeoclimatic influences. Closely related mtDNA haplotypes are co-distributed within a single region or occur in adjacent regions, nuclear allele frequencies are more similar among more proximate populations, and interpopulation migration is rare. Based on mtDNA divergence, a late Miocene-late Pliocene coalescence is likely. The present-day distribution of genetic diversity seems to have been impacted by three major climatic events: Pliocene cooling and drying (2.5-7 million years before present, Mybp), early Pleistocene wet-dry oscillations (c. 1.2 Mybp) and the more recent glacial-interglacial cycles that have characterized the latter part of the Quaternary (< 0.4 Mybp).

Original languageEnglish
Pages (from-to)3329-3344
Number of pages16
JournalMolecular Ecology
Volume13
Issue number11
DOIs
Publication statusPublished - Nov 2004

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