globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13552
论文题名:
Global warming may disproportionately affect larger adults in a predatory coral reef fish
作者: Messmer V.; Pratchett M.S.; Hoey A.S.; Tobin A.J.; Coker D.J.; Cooke S.J.; Clark T.D.
刊名: Global Change Biology
出版年: 2017
卷: 23, 期:6
起始页码: 2230
结束页码: 2240
语种: 英语
英文关键词: body size ; climate change ; critical thermal maximum ; Great Barrier Reef ; metabolic rate ; Plectropomus leopardus ; thermal tolerance
Scopus关键词: body size ; coral reef ; environmental effect ; global warming ; Hypsithermal ; metabolism ; perciform ; temperature tolerance ; Australia ; Coral Sea ; Great Barrier Reef ; Queensland ; Animalia ; Anthozoa ; Epinephelinae ; Panthera pardus ; Plectropomus leopardus
英文摘要: Global warming is expected to reduce body sizes of ectothermic animals. Although the underlying mechanisms of size reductions remain poorly understood, effects appear stronger at latitudinal extremes (poles and tropics) and in aquatic rather than terrestrial systems. To shed light on this phenomenon, we examined the size dependence of critical thermal maxima (CTmax) and aerobic metabolism in a commercially important tropical reef fish, the leopard coral grouper (Plectropomus leopardus) following acclimation to current-day (28.5 °C) vs. projected end-of-century (33 °C) summer temperatures for the northern Great Barrier Reef (GBR). CTmax declined from 38.3 to 37.5 °C with increasing body mass in adult fish (0.45–2.82 kg), indicating that larger individuals are more thermally sensitive than smaller conspecifics. This may be explained by a restricted capacity for large fish to increase mass-specific maximum metabolic rate (MMR) at 33 °C compared with 28.5 °C. Indeed, temperature influenced the relationship between metabolism and body mass (0.02–2.38 kg), whereby the scaling exponent for MMR increased from 0.74 ± 0.02 at 28.5 °C to 0.79 ± 0.01 at 33 °C, and the corresponding exponents for standard metabolic rate (SMR) were 0.75 ± 0.04 and 0.80 ± 0.03. The increase in metabolic scaling exponents at higher temperatures suggests that energy budgets may be disproportionately impacted in larger fish and contribute to reduced maximum adult size. Such climate-induced reductions in body size would have important ramifications for fisheries productivity, but are also likely to have knock-on effects for trophodynamics and functioning of ecosystems. © 2016 John Wiley & Sons Ltd
资助项目: Messmer, V. ; Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook UniversityAustralia ; 电子邮件: vanessa.messmer@gmail.com
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60940
Appears in Collections:影响、适应和脆弱性

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作者单位: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, QLD, Australia; Centre for Sustainable Tropical Fisheries and Aquaculture, School of Earth and Environmental Sciences, James Cook University, Townsville, QLD, Australia; Division of Biological and Environmental Science and Engineering, Red Sea Research Center, King Abdullah University of Science and Technology, Thuwal, Jeddah, Saudi Arabia; Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental Science, Carleton University, Ottawa, ON, Canada; Australian Institute of Marine Science, Townsville, QLD, Australia; University of Tasmania, and CSIRO Agriculture and Food, Hobart, TAS, Australia

Recommended Citation:
Messmer V.,Pratchett M.S.,Hoey A.S.,et al. Global warming may disproportionately affect larger adults in a predatory coral reef fish[J]. Global Change Biology,2017-01-01,23(6)
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