干旱区生态环境知识资源中心(Arid): Limited phylogeographic and genetic connectivity in Acacia species of low stature in an arid landscape

Arid

DOI	10.1002/ece3.9052
	Limited phylogeographic and genetic connectivity in Acacia species of low stature in an arid landscape
	Millar, Melissa A.; Binks, Rachel M.; Tapper, Sarah-Louise; Macdonald, Bronwyn M.; McArthur, Shelley L.; Hankinson, Margaret; Coates, David J.; van Leeuwen, Stephen; Byrne, Margaret
通讯作者	Millar, MA
来源期刊	ECOLOGY AND EVOLUTION
ISSN	2045-7758
出版年	2022
卷号	12 期号:7
英文摘要	Widespread plant species are expected to maintain genetic diversity and gene flow via pollen and seed dispersal. Stature is a key life history trait that affects seed and potentially pollen dispersal, with limited stature associated with limited dispersal and greater genetic differentiation. We sampled Hill's tabletop wattle (Acacia hilliana) and curry wattle (Acacia spondylophylla), two co-distributed, widespread, Acacia shrubs of low stature, across the arid Pilbara region of north-western Australia. Using chloroplast sequence and nuclear microsatellite data we evaluated patterns of population genetic and phylogeographic diversity and structure, demographic signals, ratios of pollen to seed dispersal, evidence for historical refugia, and association between elevation and diversity. Results showed strong phylogeographic (chloroplast, G(ST) = 0.831 and 0.898 for A. hilliana and A. spondylophylla, respectively) and contemporary (nuclear, F-ST = 0.260 and 0.349 for A. hilliana and A. spondylophylla, respectively) genetic structure in both species. This indicates limited genetic connectivity via seed and pollen dispersal associated with Acacia species of small stature compared to taller tree and shrub acacias across the Pilbara bioregion. This effect of stature on genetic structure is superimposed on moderate levels of genetic diversity that were expected based on widespread ranges (haplotype diversity h = 25 and 12; nuclear diversity He = 0.60 and 0.47 for A. hilliana and A. spondylophylla, respectively). Contemporary genetic structure was congruent at the greater landscape scale, especially in terms of strong genetic differentiation among geographically disjunct populations in less elevated areas. Measures of diversity and connectivity were associated with traits of greater geographic population proximity, population density, population size, and greater individual longevity, and some evidence for range expansion in A. hilliana. Results illustrate that low stature is associated with limited dispersal and greater patterns of genetic differentiation for congenerics in a common landscape and highlight the complex influence of taxon-specific life history and ecological traits to seed and pollen dispersal.
英文关键词	Acacia arid zone genetic connectivity genetic diversity Pilbara stature
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000821001200001
WOS关键词	LIFE-HISTORY ; SEED DISPERSAL ; MATING SYSTEM ; HABITAT FRAGMENTATION ; POPULATION-SIZE ; PLANT ; POLLEN ; DIVERSITY ; SOFTWARE ; BIODIVERSITY
WOS类目	Ecology ; Evolutionary Biology
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392379
推荐引用方式 GB/T 7714	Millar, Melissa A.,Binks, Rachel M.,Tapper, Sarah-Louise,et al. Limited phylogeographic and genetic connectivity in Acacia species of low stature in an arid landscape[J],2022,12(7).
APA	Millar, Melissa A..,Binks, Rachel M..,Tapper, Sarah-Louise.,Macdonald, Bronwyn M..,McArthur, Shelley L..,...&Byrne, Margaret.(2022).Limited phylogeographic and genetic connectivity in Acacia species of low stature in an arid landscape.ECOLOGY AND EVOLUTION,12(7).
MLA	Millar, Melissa A.,et al."Limited phylogeographic and genetic connectivity in Acacia species of low stature in an arid landscape".ECOLOGY AND EVOLUTION 12.7(2022).