Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14811 |
Integrating patterns of thermal tolerance and phenotypic plasticity with population genetics to improve understanding of vulnerability to warming in a widespread copepod | |
Sasaki, Matthew C.; Dam, Hans G. | |
2019-09-23 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | USA |
英文摘要 | Differences in population vulnerability to warming are defined by spatial patterns in thermal adaptation. These patterns may be driven by natural selection over spatial environmental gradients, but can also be shaped by gene flow, especially in marine taxa with high dispersal potential. Understanding and predicting organismal responses to warming requires disentangling the opposing effects of selection and gene flow. We begin by documenting genetic divergence of thermal tolerance and developmental phenotypic plasticity. Ten populations of the widespread copepod Acartia tonsa were collected from sites across a large thermal gradient, ranging from the Florida Keys to Northern New Brunswick, Canada (spanning over 20 degrees latitude). Thermal performance curves (TPCs) from common garden experiments revealed local adaptation at the sampling range extremes, with thermal tolerance increasing at low latitudes and decreasing at high latitudes. The opposite pattern was observed in phenotypic plasticity, which was strongest at high latitudes. No relationship was observed between phenotypic plasticity and environmental variables. Instead, the results are consistent with the hypothesis of a trade-off between thermal tolerance and the strength of phenotypic plasticity. Over a large portion of the sampled range, however, we observed a remarkable lack of differentiation of TPCs. To examine whether this lack of divergence is the result of selection for a generalist performance curve or constraint by gene flow, we analyzed cytochrome oxidase I mtDNA sequences, which revealed four distinct genetic clades, abundant genetic diversity, and widely distributed haplotypes. Strong divergence in thermal performance within genetic clades, however, suggests that the pace of thermal adaptation can be relatively rapid. The combined insight from the laboratory physiological experiments and genetic data indicate that gene flow constrains differentiation of TPCs. This balance between gene flow and selection has implications for patterns of vulnerability to warming. Taking both genetic differentiation and phenotypic plasticity into account, our results suggest that local adaptation does not increase vulnerability to warming, and that low-latitude populations in general may be more vulnerable to predicted temperature change over the next century. |
英文关键词 | climate change climate variability hypothesis copepod gene flow local adaptation macrophysiology phenotypic plasticity plankton rapid adaptation thermal performance |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000487420800001 |
WOS关键词 | CLIMATE-CHANGE ; ADAPTIVE DIVERGENCE ; ACARTIA-TONSA ; COMPARATIVE PHYLOGEOGRAPHY ; EVOLUTIONARY RESPONSES ; ACCLIMATION CAPACITY ; LATITUDINAL GRADIENT ; PROPAGULE DISPERSAL ; ESTUARINE COPEPOD ; MARINE |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/187125 |
专题 | 气候变化 资源环境科学 |
作者单位 | Univ Connecticut, Dept Marine Sci, Groton, CT 06340 USA |
推荐引用方式 GB/T 7714 | Sasaki, Matthew C.,Dam, Hans G.. Integrating patterns of thermal tolerance and phenotypic plasticity with population genetics to improve understanding of vulnerability to warming in a widespread copepod[J]. GLOBAL CHANGE BIOLOGY,2019. |
APA | Sasaki, Matthew C.,&Dam, Hans G..(2019).Integrating patterns of thermal tolerance and phenotypic plasticity with population genetics to improve understanding of vulnerability to warming in a widespread copepod.GLOBAL CHANGE BIOLOGY. |
MLA | Sasaki, Matthew C.,et al."Integrating patterns of thermal tolerance and phenotypic plasticity with population genetics to improve understanding of vulnerability to warming in a widespread copepod".GLOBAL CHANGE BIOLOGY (2019). |
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