Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/mec.14475 |
Mechanisms of thermal adaptation and evolutionary potential of conspecific populations to changing environments | |
Chen, Zhongqi1; Farrell, Anthony P.1,2; Matala, Amanda3; Narum, Shawn R.3 | |
通讯作者 | Narum, Shawn R. |
来源期刊 | MOLECULAR ECOLOGY
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ISSN | 0962-1083 |
EISSN | 1365-294X |
出版年 | 2018 |
卷号 | 27期号:3页码:659-674 |
英文摘要 | Heterogeneous and ever-changing thermal environments drive the evolution of populations and species, especially when extreme conditions increase selection pressure for traits influencing fitness. However, projections of biological diversity under scenarios of climate change rarely consider evolutionary adaptive potential of natural species. In this study, we tested for mechanistic evidence of evolutionary thermal adaptation among ecologically divergent redband trout populations (Oncorhynchus mykiss gairdneri) in cardiorespiratory function, cellular response and genomic variation. In a common garden environment, fish from an extreme desert climate had significantly higher critical thermal maximum (p < .05) and broader optimum thermal window for aerobic scope (>3 degrees C) than fish from cooler montane climate. In addition, the desert population had the highest maximum heart rate during warming (20% greater than montane populations), indicating improved capacity to deliver oxygen to internal tissues. In response to acute heat stress, distinct sets of cardiac genes were induced among ecotypes, which helps to explain the differences in cardiorespiratory function. Candidate genomic markers and genes underlying these physiological adaptations were also pinpointed, such as genes involved in stress response and metabolic activity (hsp40, ldh-b and camkk2). These markers were developed into a multivariate model that not only accurately predicted critical thermal maxima, but also evolutionary limit of thermal adaptation in these specific redband trout populations relative to the expected limit for the species. This study demonstrates mechanisms and limitations of an aquatic species to evolve under changing environments that can be incorporated into advanced models to predict ecological consequences of climate change for natural organisms. |
英文关键词 | aerobic scope climate change critical thermal maximum maximum heart rate metabolic rate oxygen- and capacity-limited thermal tolerance RAD-seq redband trout RNA-seq |
类型 | Article |
语种 | 英语 |
国家 | Canada ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000428453500006 |
WOS关键词 | DIFFERENTIAL EXPRESSION ANALYSIS ; RAINBOW-TROUT ; CLIMATE-CHANGE ; TEMPERATURE-ACCLIMATION ; ONCORHYNCHUS-MYKISS ; REDBAND TROUT ; TOLERANCE ; PHYSIOLOGY ; GENOMICS ; LOCI |
WOS类目 | Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology |
WOS研究方向 | Biochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Evolutionary Biology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/211706 |
作者单位 | 1.Univ British Columbia, Dept Zool, Vancouver, BC, Canada; 2.Univ British Columbia, Fac Land & Food Syst, Vancouver, BC, Canada; 3.Columbia River Inter Tribal Fish Commiss, Hagerman, ID USA |
推荐引用方式 GB/T 7714 | Chen, Zhongqi,Farrell, Anthony P.,Matala, Amanda,et al. Mechanisms of thermal adaptation and evolutionary potential of conspecific populations to changing environments[J],2018,27(3):659-674. |
APA | Chen, Zhongqi,Farrell, Anthony P.,Matala, Amanda,&Narum, Shawn R..(2018).Mechanisms of thermal adaptation and evolutionary potential of conspecific populations to changing environments.MOLECULAR ECOLOGY,27(3),659-674. |
MLA | Chen, Zhongqi,et al."Mechanisms of thermal adaptation and evolutionary potential of conspecific populations to changing environments".MOLECULAR ECOLOGY 27.3(2018):659-674. |
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