Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13784 |
The heat is on: Genetic adaptation to urbanization mediated by thermal tolerance and body size | |
Brans, Kristien I.1; Jansen, Mieke1; Vanoverbeke, Joost1,2; Tuzun, Nedim1; Stoks, Robby1; De Meester, Luc1 | |
2017-12-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Belgium |
英文摘要 | Worldwide, urbanization leads to tremendous anthropogenic environmental alterations, causing strong selection pressures on populations of animals and plants. Although a key feature of urban areas is their higher temperature (urban heat islands), adaptive thermal evolution in organisms inhabiting urban areas has rarely been studied. We tested for evolution of a higher heat tolerance (CTMAX) in urban populations of the water flea Daphnia magna, a keystone grazer in freshwater ecosystems, by carrying out a common garden experiment at two temperatures (20 degrees C and 24 degrees C) with genotypes of 13 natural populations ordered along a well-defined urbanization gradient. We also assessed body size and haemoglobin concentration to identify underlying physiological drivers of responses in CTMAX. We found a higher CTMAX in animals isolated from urban compared to rural habitats and in animals reared at higher temperatures. We also observed substantial genetic variation in thermal tolerance within populations. Overall, smaller animals were more heat tolerant. While urban animals mature at smaller size, the effect of urbanization on thermal tolerance is only in part caused by reductions in body size. Although urban Daphnia contained higher concentrations of haemoglobin, this did not contribute to their higher CTMAX. Our results provide evidence of adaptive thermal evolution to urbanization in the water flea Daphnia. In addition, our results show both evolutionary potential and adaptive plasticity in rural as well as urban Daphnia populations, facilitating responses to warming. Given the important ecological role of Daphnia in ponds and lakes, these adaptive responses likely impact food web dynamics, top-down control of algae, water quality, and the socio-economic value of urban ponds. |
英文关键词 | critical thermal maximum Daphnia magna global warming haemoglobin phenotypic plasticity structural equationmodelling temperature-size rule urban evolution |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414969000022 |
WOS关键词 | WATER FLEA DAPHNIA ; RAPID EVOLUTION ; CLIMATE-CHANGE ; MICROCRUSTACEAN DAPHNIA ; URBAN-ENVIRONMENT ; DYNAMIC ACTION ; TEMPERATURE ; MAGNA ; ISLAND ; STRESS |
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/17563 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Katholieke Univ Leuven, Lab Aquat Ecol Evolut & Conservat, B-3000 Leuven, Belgium; 2.Res Inst Nat & Forest INBO, Brussels, Belgium |
推荐引用方式 GB/T 7714 | Brans, Kristien I.,Jansen, Mieke,Vanoverbeke, Joost,et al. The heat is on: Genetic adaptation to urbanization mediated by thermal tolerance and body size[J]. GLOBAL CHANGE BIOLOGY,2017,23(12). |
APA | Brans, Kristien I.,Jansen, Mieke,Vanoverbeke, Joost,Tuzun, Nedim,Stoks, Robby,&De Meester, Luc.(2017).The heat is on: Genetic adaptation to urbanization mediated by thermal tolerance and body size.GLOBAL CHANGE BIOLOGY,23(12). |
MLA | Brans, Kristien I.,et al."The heat is on: Genetic adaptation to urbanization mediated by thermal tolerance and body size".GLOBAL CHANGE BIOLOGY 23.12(2017). |
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