Inbreeding depression explains killer whale population dynamics

doi:10.1038/s41559-023-01995-0

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海生物学研究室 > 海洋哺乳动物与海洋生物声学研究组

	Inbreeding depression explains killer whale population dynamics
	Kardos, Marty 7; Zhang, Yaolei 5,6; Parsons, Kim M.7; Yunga, A.6; Kang, Hui 4; Xu, Xun 5; Liu, Xin 5; Matkin, Craig O.3; Zhang, Peijun 4; Ward, Eric J.7
刊名	NATURE ECOLOGY & EVOLUTION
	2023-03-20
页码	26
ISSN号	2397-334X
DOI	10.1038/s41559-023-01995-0
通讯作者	Kardos, Marty(martin.kardos@noaa.gov) ; Ford, Michael J.(mike.ford@noaa.gov) ; Fan, Guangyi(fanguangyi@genomics.cn) ; Li, Songhai(lish@idsse.ac.cn)
英文摘要	Understanding the factors that cause endangered populations to either grow or decline is crucial for preserving biodiversity. Conservation efforts often address extrinsic threats, such as environmental degradation and overexploitation, that can limit the recovery of endangered populations. Genetic factors such as inbreeding depression can also affect population dynamics but these effects are rarely measured in the wild and thus often neglected in conservation efforts. Here we show that inbreeding depression strongly influences the population dynamics of an endangered killer whale population, despite genomic signatures of purging of deleterious alleles via natural selection. We find that the 'Southern Residents', which are currently endangered despite nearly 50 years of conservation efforts, exhibit strong inbreeding depression for survival. Our population models suggest that this inbreeding depression limits population growth and predict further decline if the population remains genetically isolated and typical environmental conditions continue. The Southern Residents also had more inferred homozygous deleterious alleles than three other, growing, populations, further suggesting that inbreeding depression affects population fitness. These results demonstrate that inbreeding depression can substantially limit the recovery of endangered populations. Conservation actions focused only on extrinsic threats may therefore fail to account for key intrinsic genetic factors that also limit population growth. Genomic and demographic analyses of the 'Southern Resident' killer whales in the North Pacific find that strong inbreeding depression is inhibiting growth of this small and isolated population. The findings help to explain why this group of whales is still declining despite 50 years of conservation efforts.
资助项目	Center for Whale Research, WA, USA ; National Natural Science Foundation of China[42225604] ; National Natural Science Foundation of China[41422604] ; One Belt and One Road' Science and Technology Cooperation Special Program of the International Partnership Program of the Chinese Academy of Sciences[183446KYSB20200016] ; Blue granary scientific and technological innovation of China[2018YFD0900301-05]
WOS关键词	ORCINUS-ORCA ; DELETERIOUS MUTATIONS ; DEMOGRAPHIC HISTORY ; EXTINCTION RISK ; GENETIC RESCUE ; PREY ABUNDANCE ; FITNESS ; HOMOZYGOSITY ; IDENTITY ; PATTERNS
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology
语种	英语
出版者	NATURE PORTFOLIO
WOS记录号	WOS:000999983400005
资助机构	Center for Whale Research, WA, USA ; National Natural Science Foundation of China ; One Belt and One Road' Science and Technology Cooperation Special Program of the International Partnership Program of the Chinese Academy of Sciences ; Blue granary scientific and technological innovation of China
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/10489]
专题	深海科学研究部_深海生物学研究室_海洋哺乳动物与海洋生物声学研究组
通讯作者	Kardos, Marty; Ford, Michael J.; Fan, Guangyi; Li, Songhai
作者单位	1.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 2.BGI Shenzhen, State Key Lab Agr Genom, Shenzhen, Peoples R China 3.North Gulf Ocean Soc, Homer, AK USA 4.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Marine Mammal & Marine Bioacoust Lab, Sanya, Peoples R China 5.BGI Shenzhen, Shenzhen, Peoples R China 6.BGI Qingdao, Qingdao, Peoples R China 7.NOAA, Northwest Fisheries Sci Ctr, Natl Marine Fisheries Serv, Seattle, WA 98115 USA
推荐引用方式 GB/T 7714	Kardos, Marty,Zhang, Yaolei,Parsons, Kim M.,et al. Inbreeding depression explains killer whale population dynamics[J]. NATURE ECOLOGY & EVOLUTION,2023:26.
APA	Kardos, Marty.,Zhang, Yaolei.,Parsons, Kim M..,Yunga, A..,Kang, Hui.,...&Li, Songhai.(2023).Inbreeding depression explains killer whale population dynamics.NATURE ECOLOGY & EVOLUTION,26.
MLA	Kardos, Marty,et al."Inbreeding depression explains killer whale population dynamics".NATURE ECOLOGY & EVOLUTION (2023):26.