Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1038/s41437-019-0259-2 |
| Hybridization drives genetic erosion in sympatric desert fishes of western North America | |
| Chafin, Tyler K.; Douglas, Marlis R.; Martin, Bradley T.; Douglas, Michael E. | |
| 通讯作者 | Chafin, Tyler K. |
| 来源期刊 | HEREDITY
 |
| ISSN | 0018-067X |
| EISSN | 1365-2540 |
| 出版年 | 2019 |
| 卷号 | 123期号:6页码:759-773 |
| 英文摘要 | Many species have evolved or currently coexist in sympatry due to differential adaptation in a heterogeneous environment. However, anthropogenic habitat modifications can either disrupt reproductive barriers or obscure environmental conditions which underlie fitness gradients. In this study, we evaluated the potential for an anthropogenically-mediated shift in reproductive boundaries that separate two historically sympatric fish species (Gila cypha and G. robusta) endemic to the Colorado River Basin using ddRAD sequencing of 368 individuals. We first examined the integrity of reproductive isolation while in sympatry and allopatry, then characterized hybrid ancestries using genealogical assignment tests. We tested for localized erosion of reproductive isolation by comparing site-wise genomic clines against global patterns and identified a breakdown in the drainage-wide pattern of selection against interspecific heterozygotes. This, in turn, allowed for the formation of a hybrid swarm in one tributary, and asymmetric introgression where species co-occur. We also detected a weak but significant relationship between genetic purity and degree of consumptive water removal, suggesting a role for anthropogenic habitat modifications in undermining species boundaries or expanding historically limited introgression. In addition, results from basin-wide genomic clines suggested that hybrids and parental forms are adaptively nonequivalent. If so, then a failure to manage for hybridization will exacerbate the long-term extinction risk in parental populations. These results reinforce the role of anthropogenic habitat modification in promoting interspecific introgression in sympatric species by relaxing divergent selection. This, in turn, underscores a broader role for hybridization in decreasing global biodiversity within rapidly deteriorating environments. |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | USA |
| 开放获取类型 | Green Submitted, Bronze, Green Published |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000495572900005 |
| WOS关键词 | COLORADO RIVER ; GILA-ROBUSTA ; INTROGRESSIVE HYBRIDIZATION ; CLIMATE-CHANGE ; HUMPBACK CHUB ; GRAND-CANYON ; RECOMBINATION RATE ; EXTINCTION RISK ; LIFE-HISTORY ; CYPRINIDAE |
| WOS类目 | Ecology ; Evolutionary Biology ; Genetics & Heredity |
| WOS研究方向 | Environmental Sciences & Ecology ; Evolutionary Biology ; Genetics & Heredity |
| EI主题词 | 2019-12-01 |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/311117 |
| 作者单位 | Univ Arkansas, Dept Biol Sci, Fayetteville, AR 72701 USA |
| 推荐引用方式 GB/T 7714 | Chafin, Tyler K.,Douglas, Marlis R.,Martin, Bradley T.,et al. Hybridization drives genetic erosion in sympatric desert fishes of western North America[J],2019,123(6):759-773. |
| APA | Chafin, Tyler K.,Douglas, Marlis R.,Martin, Bradley T.,&Douglas, Michael E..(2019).Hybridization drives genetic erosion in sympatric desert fishes of western North America.HEREDITY,123(6),759-773. |
| MLA | Chafin, Tyler K.,et al."Hybridization drives genetic erosion in sympatric desert fishes of western North America".HEREDITY 123.6(2019):759-773. |
| 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。
