2022
DOI: 10.3389/fcosc.2022.833766
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Topographic Complexity Facilitates Persistence Compared to Signals of Contraction and Expansion in the Adjacent Subdued Landscape

Abstract: Topographically heterogeneous areas are likely to act as refugia for species because they facilitate survival during regional climatic stress due to availability of a range of microenvironments. The Stirling Ranges are a topographically complex area in the generally subdued and ancient landscape of south-western Australia. We investigated the influence of these landscape features on the evolutionary history of the rare woody shrub, Banksia brownii through a combined approach using phylogeographic analysis of s… Show more

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Cited by 2 publications
(3 citation statements)
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“…However, the presence of private alleles in this subpopulation compared to its reference sources suggests that it seems to have captured some diversity no longer present in the extant source populations. The lack of private alleles in the analysis of the full dataset suggests that this diversity was present at the time of seed collection for the subpopulation establishment, consistent with historic connectivity among the other source populations that would be expected in a formerly common and widespread species, and supported by our TreeMix analysis as well as previous research (Coates et al 2015; Byrne et al 2022).…”
Section: Discussionsupporting
confidence: 87%
See 1 more Smart Citation
“…However, the presence of private alleles in this subpopulation compared to its reference sources suggests that it seems to have captured some diversity no longer present in the extant source populations. The lack of private alleles in the analysis of the full dataset suggests that this diversity was present at the time of seed collection for the subpopulation establishment, consistent with historic connectivity among the other source populations that would be expected in a formerly common and widespread species, and supported by our TreeMix analysis as well as previous research (Coates et al 2015; Byrne et al 2022).…”
Section: Discussionsupporting
confidence: 87%
“…The species has a mixed‐mating system with a high level of selfing compared to that of many congenerics (Sampson et al 1994). Across the species' distribution in southwestern Australia, natural remnant populations of B. brownii occur as three genetically differentiated geographic regions that are regarded as separate conservation units for management and recovery (Coates et al 2015; Byrne et al 2022). A translocated population was established in 2007 and 2008 in Benmore, Western Australia, by planting individuals from four populations the Central lowland conservation unit, native to the Millbrook‐Waychinicup region.…”
Section: Introductionmentioning
confidence: 99%
“…Topographically heterogeneous areas are likely to act as refugia for species because they facilitate survival during regional climatic stress due to availability of a range of microenvironments ( Byrne et al., 2022 ). Generally, mountainous regions can provide a few microhabitats for species survival when they facing adverse conditions or environments, while flat regions with few major geomorphologic features usually have a poorer refugial capacity ( Trew and Maclean, 2021 ).…”
Section: Discussionmentioning
confidence: 99%