DOI: 10.1111/gcb.13488
论文题名: Adapt, move or die – how will tropical coral reef fishes cope with ocean warming?
作者: Habary A. ; Johansen J.L. ; Nay T.J. ; Steffensen J.F. ; Rummer J.L.
刊名: Global Change Biology
出版年: 2017
卷: 23, 期: 2 起始页码: 566
结束页码: 577
语种: 英语
英文关键词: acclimation
; aerobic scope
; behavioural thermoregulation
; critical thermal limits
; global warming
; temperature preference
Scopus关键词: Anthozoa
; Chromis viridis
; Pisces
; Pomacentridae
英文摘要: Previous studies hailed thermal tolerance and the capacity for organisms to acclimate and adapt as the primary pathways for species survival under climate change. Here we challenge this theory. Over the past decade, more than 365 tropical stenothermal fish species have been documented moving poleward, away from ocean warming hotspots where temperatures 2–3 °C above long-term annual means can compromise critical physiological processes. We examined the capacity of a model species – a thermally sensitive coral reef fish, Chromis viridis (Pomacentridae) – to use preference behaviour to regulate its body temperature. Movement could potentially circumvent the physiological stress response associated with elevated temperatures and may be a strategy relied upon before genetic adaptation can be effectuated. Individuals were maintained at one of six temperatures (23, 25, 27, 29, 31 and 33 °C) for at least 6 weeks. We compared the relative importance of acclimation temperature to changes in upper critical thermal limits, aerobic metabolic scope and thermal preference. While acclimation temperature positively affected the upper critical thermal limit, neither aerobic metabolic scope nor thermal preference exhibited such plasticity. Importantly, when given the choice to stay in a habitat reflecting their acclimation temperatures or relocate, fish acclimated to end-of-century predicted temperatures (i.e. 31 or 33 °C) preferentially sought out cooler temperatures, those equivalent to long-term summer averages in their natural habitats (~29 °C). This was also the temperature providing the greatest aerobic metabolic scope and body condition across all treatments. Consequently, acclimation can confer plasticity in some performance traits, but may be an unreliable indicator of the ultimate survival and distribution of mobile stenothermal species under global warming. Conversely, thermal preference can arise long before, and remain long after, the harmful effects of elevated ocean temperatures take hold and may be the primary driver of the escalating poleward migration of species. © 2016 John Wiley & Sons Ltd 资助项目: Habary, A.
; ARC Centre of Excellence for Coral Reef Studies, James Cook UniversityAustralia
; 电子邮件: adamhabary@hotmail.com
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61069
Appears in Collections: 影响、适应和脆弱性
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作者单位: ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, QLD, Australia; Marine Biological Section, Department of Biology, University of Copenhagen, Strandpromenaden 5, Helsingør, Denmark; Marine Science Institute, University of Texas at Austin, Port Aransas, TX, United States
Recommended Citation:
Habary A.,Johansen J.L.,Nay T.J.,et al. Adapt, move or die – how will tropical coral reef fishes cope with ocean warming?[J]. Global Change Biology,2017-01-01,23(2)