Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/ece3.3246 |
Clonality disguises the vulnerability of a threatened arid zone Acacia | |
Roberts, David G.1,2,4; Forrest, Cairo N.1,2; Denham, Andrew J.1,2,3; Ayre, David J.1,2 | |
通讯作者 | Roberts, David G. |
来源期刊 | ECOLOGY AND EVOLUTION |
ISSN | 2045-7758 |
出版年 | 2017 |
卷号 | 7期号:22页码:9451-9460 |
英文摘要 | Long-lived, widespread plant species are expected to be genetically diverse, reflecting the interaction between large population sizes, overlapping generations, and gene flow. Such species are thought to be resilient to disturbance, but may carry an extinction debt due to reproductive failure. Genetic studies of Australian arid zone plant species suggest an unusually high frequency of asexuality, polyploidy, or both. A preliminary AFLP genetic study implied that the naturally fragmented arid zone tree, Acacia carneorum, is almost entirely dependent on asexual reproduction through suckering, and stands may have lacked genetic diversity and interconnection even prior to the onset of European pastoralism. Here we surveyed microsatellite genetic variation in 20 stands to test for variation in life histories and further assessed the conservation status of the species by comparing genetic diversity within protected stands in National Parks and disturbed range lands. Using herbarium records, we estimate that 219 stands are extant, all of which occur in the arid zone, west of the Darling River in southeastern Australia. With two exceptions, all surveyed stands comprised only one multilocus genet and at least eight were putatively polyploid. Although some stands comprise thousands of stems, our findings imply that the species as a whole may represent similar to 240 distinct genetic individuals, many of which are polyploid, and most are separated by >10km of unsuitable habitat. With only 34% of stands (and therefore genets) occurring within conservation reserves, A.carneorum may be at much greater risk of extinction than inferred from on-ground census data. Land managers should prioritize on-ground preservation of the genotypes within existing reserves, protecting both vegetative suckers and seedlings from herbivory. Importantly, three stands are known to set viable seed and should be used to generate genetically diverse germ-plasm for ex situ conservation, population augmentation, or translocation. |
英文关键词 | Australia clonal plants conservation heterozygosity polyploidy population genetics reproductive failure |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000415900800021 |
WOS关键词 | MICROSATELLITE MARKERS ; SEXUAL REPRODUCTION ; LOCAL ADAPTATION ; POPULATION ; CONSERVATION ; AUSTRALIA ; DESERT ; PLANTS ; DIVERSITY ; PATTERNS |
WOS类目 | Ecology ; Evolutionary Biology |
WOS研究方向 | Environmental Sciences & Ecology ; Evolutionary Biology |
来源机构 | University of Western Australia |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/198516 |
作者单位 | 1.Univ Wollongong, Sch Biol Sci, Wollongong, NSW, Australia; 2.Univ Wollongong, Ctr Sustainable Ecosyst Serv, Wollongong, NSW, Australia; 3.New South Wales Off Environm & Heritage, Hurstville, NSW, Australia; 4.Univ Western Australia, Ctr Excellence Nat Resource Management, Albany, WA, Australia |
推荐引用方式 GB/T 7714 | Roberts, David G.,Forrest, Cairo N.,Denham, Andrew J.,et al. Clonality disguises the vulnerability of a threatened arid zone Acacia[J]. University of Western Australia,2017,7(22):9451-9460. |
APA | Roberts, David G.,Forrest, Cairo N.,Denham, Andrew J.,&Ayre, David J..(2017).Clonality disguises the vulnerability of a threatened arid zone Acacia.ECOLOGY AND EVOLUTION,7(22),9451-9460. |
MLA | Roberts, David G.,et al."Clonality disguises the vulnerability of a threatened arid zone Acacia".ECOLOGY AND EVOLUTION 7.22(2017):9451-9460. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。