干旱区生态环境知识资源中心(Arid): Boom- bust population dynamics drive rapid genetic change

Arid

DOI	10.1073/pnas.2320590121
	Boom- bust population dynamics drive rapid genetic change
	Stringer, Emily J.; Gruber, Bernd; Sarre, Stephen D.; Wardle, Glenda M.; Edwards, Scott V.; Dickman, Christopher R.; Greenville, Aaron C.; Duncan, Richard P.
通讯作者	Edwards, SV
来源期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN	0027-8424
EISSN	1091-6490
出版年	2024
卷号	121 期号:18
英文摘要	Increasing environmental threats and more extreme environmental perturbations place species at risk of population declines, with associated loss of genetic diversity and evolutionary potential. While theory shows that rapid population declines can cause loss of genetic diversity, populations in some environments, like Australia's arid zone, are repeatedly subject to major population fluctuations yet persist and appear able to maintain genetic diversity. Here, we use repeated population sampling over 13 y and genotype - by - sequencing of 1903 individuals to investigate the genetic consequences of repeated population fluctuations in two small mammals in the Australian arid zone. The sandy inland mouse ( Pseudomys hermannsburgensis ) experiences marked boom - bust population dynamics in response to the highly variable desert environment. We show that heterozygosity levels declined, and population differentiation ( F ST ) increased, during bust periods when populations became small and isolated, but that heterozygosity was rapidly restored during episodic population booms. In contrast, the lesser hairy - footed dunnart ( Sminthopsis youngsoni ), a desert marsupial that maintains relatively stable population sizes, showed no linear declines in heterozygosity. These results reveal two contrasting ways in which genetic diversity is maintained in highly variable environments. In one species, diversity is conserved through the maintenance of stable population sizes across time. In the other species, diversity is conserved through rapid genetic mixing during population booms that restores heterozygosity lost during population busts.
英文关键词	population genetics genetic diversity population fluctuations contemporary evolution single nucleotide polymorphisms
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001228441800005
WOS关键词	SMALL MAMMALS ; LINKAGE DISEQUILIBRIUM ; CLIMATE EXTREMES ; ARID AUSTRALIA ; DESERT RODENTS ; EFFECTIVE SIZE ; N-E ; DIVERSITY ; MOVEMENTS ; RAINFALL
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405231
推荐引用方式 GB/T 7714	Stringer, Emily J.,Gruber, Bernd,Sarre, Stephen D.,et al. Boom- bust population dynamics drive rapid genetic change[J],2024,121(18).
APA	Stringer, Emily J..,Gruber, Bernd.,Sarre, Stephen D..,Wardle, Glenda M..,Edwards, Scott V..,...&Duncan, Richard P..(2024).Boom- bust population dynamics drive rapid genetic change.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,121(18).
MLA	Stringer, Emily J.,et al."Boom- bust population dynamics drive rapid genetic change".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 121.18(2024).