Data from: Population structure within an alpine archipelago: strong signature of past climate change in the New Zealand rock wren (Xenicus gilviventris)
Data files
Aug 18, 2015 version files 227 KB
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Bayes 1stdomain cntl reg.tre
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Cntrl reg FULL.tre
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cytb tree_beast.txt
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fig tree bfibphased.tre
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ML beta_ fib.tree
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ML Cntrl reg 1st dom.tree
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ML cntrl reg.tree
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ML cyt b.tree
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MP beta_fib.tree
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MP Cntrl reg 1st dom.tree
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MP cyt b.tree
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X. gilviventris b-fib int7 sequence data.fasta
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X. gilviventris Cyt b sequence data.fasta
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X. gilviventris genotyped individuals.xlsx
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X. gilviventris pairwise geographic distances_North only.xlsx
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X. gilviventris pairwise geographic distances_South only.xlsx
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X. gilviventris pairwise geographic distances.xlsx
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X.gilviventris Cntrl Reg sequence data.fasta
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Abstract
Naturally subdivided populations such as those occupying high-altitude habitat patches of the ‘alpine archipelago’ can provide significant insight into past biogeographical change and serve as useful models for predicting future responses to anthropogenic climate change. Among New Zealand's alpine taxa, phylogenetic studies support two major radiations: the first correlating with geological forces (Pliocene uplift) and the second with climatic processes (Pleistocene glaciations). The rock wren (Xenicus gilviventris) is a threatened alpine passerine belonging to the endemic New Zealand wren family (Acanthisittidae). Rock wren constitute a widespread, naturally fragmented population, occurring in patches of suitable habitat over c. 900 m in altitude throughout the length of the South Island, New Zealand. We investigated the relative role of historical geological versus climatic processes in shaping the genetic structure of rock wren (N = 134) throughout their range. Using microsatellites combined with nuclear and mtDNA sequence data, we identify a deep north–south divergence in rock wren (3.7 ± 0.5% at cytochrome b) consistent with the glacial refugia hypothesis whereby populations were restricted in isolated refugia during the Pleistocene c. 2 Ma. This is the first study of an alpine vertebrate to test and provide strong evidence for the glacial refugia hypothesis as an explanation for the low endemicity central zone known as the biotic ‘gap’ in the South Island of New Zealand.