干旱区生态环境知识资源中心(Arid): Genetic diversity and gene flow patterns in two riverine plant species with contrasting life-history traits and distributions across a large inland floodplain

Arid

DOI	10.1071/BT20074
	Genetic diversity and gene flow patterns in two riverine plant species with contrasting life-history traits and distributions across a large inland floodplain
	Higgisson, William; Gleeson, Dianne; Broadhurst, Linda; Dyer, Fiona
通讯作者	Higgisson, W
来源期刊	AUSTRALIAN JOURNAL OF BOTANY
ISSN	0067-1924
EISSN	1444-9862
出版年	2020
卷号	68 期号:5 页码:384-401
英文摘要	Gene flow is a key evolutionary driver of spatial genetic structure, reflecting demographic processes and dispersal mechanisms. Understanding how genetic structure is maintained across a landscape can assist in setting conservation objectives. In Australia, floodplains naturally experience highly variable flooding regimes that structure the vegetation communities. Flooding plays an important role, connecting communities on floodplains and enabling dispersal via hydrochory. Water resource development has changed the lateral-connectivity of floodplain-river systems. One possible consequence of these changes is reduced physical and subsequent genetic connections. This study aimed to identify and compare the population structure and dispersal patterns of tangled lignum (Duma florulenta) and river cooba (Acacia stenophylla) across a large inland floodplain using a landscape genetics approach. Both species are widespread throughout flood prone areas of arid and semiarid Australia. Tangled lignum occurs on floodplains while river cooba occurs along rivers. Leaves were collected from 144 tangled lignum plants across 10 sites and 84 river cooba plants across 6 sites, on the floodplain of the lower and mid Lachlan River, and the Murrumbidgee River, NSW. DNA was extracted and genotyped using DArTseq platforms (double digest RADseq). Genetic diversity was compared with floodplain-river connection frequency, and genetic distance (F-ST) was compared with river distance, geographic distance and floodplain-river connection frequency between sites. Genetic similarity increased with increasing floodplain-river connection frequency in tangled lignum but not in river cooba. In tangled lignum, sites that experience more frequent flooding had greater genetic diversity and were more genetically homogenous. There was also an isolation by distance effect where increasing geographic distance correlated with increasing genetic differentiation in tangled lignum, but not in river cooba. The distribution of river cooba along rivers facilitates regular dispersal of seeds via hydrochory regardless of river level, while the dispersal of seeds of tangled lignum between patches is dependent on flooding events. The genetic impact of water resource development may be greater for species which occur on floodplains compared with species along river channels.
英文关键词	dispersal flooding floodplains gene flow genetic distance genetic structure life-history traits population structure river cooba tangled lignum vegetation communities
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000575610500001
WOS关键词	HABITAT FRAGMENTATION ; DUMA-FLORULENTA ; POPULATIONS ; CONSEQUENCES ; SHRUB ; GERMINATION ; ECOSYSTEMS ; MANAGEMENT ; LIKELIHOOD ; DISPERSAL
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
来源机构	Commonwealth Scientific and Industrial Research Organisation
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326647
作者单位	[Higgisson, William; Dyer, Fiona] Univ Canberra, Inst Appl Ecol, Ctr Appl Water Sci, Univ Dr, Canberra, ACT 2617, Australia; [Gleeson, Dianne] Univ Canberra, Fac Sci & Technol, Ctr Ecol Conservat & Genet, Inst Appl Ecol, Canberra, ACT 2601, Australia; [Broadhurst, Linda] CSIRO Natl Res Collect Australia, Ctr Australian Natl Biodivers Res, GPO Box 1700, Canberra, ACT 2601, Australia
推荐引用方式 GB/T 7714	Higgisson, William,Gleeson, Dianne,Broadhurst, Linda,et al. Genetic diversity and gene flow patterns in two riverine plant species with contrasting life-history traits and distributions across a large inland floodplain[J]. Commonwealth Scientific and Industrial Research Organisation,2020,68(5):384-401.
APA	Higgisson, William,Gleeson, Dianne,Broadhurst, Linda,&Dyer, Fiona.(2020).Genetic diversity and gene flow patterns in two riverine plant species with contrasting life-history traits and distributions across a large inland floodplain.AUSTRALIAN JOURNAL OF BOTANY,68(5),384-401.
MLA	Higgisson, William,et al."Genetic diversity and gene flow patterns in two riverine plant species with contrasting life-history traits and distributions across a large inland floodplain".AUSTRALIAN JOURNAL OF BOTANY 68.5(2020):384-401.