DOI: 10.1111/gcb.13240
论文题名: Field and laboratory studies reveal interacting effects of stream oxygenation and warming on aquatic ectotherms
作者: Verberk W.C.E.P. ; Durance I. ; Vaughan I.P. ; Ormerod S.J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 5 起始页码: 1769
结束页码: 1778
语种: 英语
英文关键词: Climate change
; Hypoxia
; Insects
; Multiple stressors
; Pollution
; Streams
; Temperature
; Thermal tolerance
Scopus关键词: climate change
; ectothermy
; environmental stress
; experimental study
; hypoxia
; insect
; laboratory method
; oxygenation
; stream
; sublethal effect
; warming
; United Kingdom
; Ephemera danica
; Ephemeroptera
; Hexapoda
; Invertebrata
; Serratella
; oxygen
; animal
; animal dispersal
; chemistry
; climate change
; England
; Ephemeroptera
; greenhouse effect
; growth, development and aging
; nymph
; physiology
; river
; Animal Distribution
; Animals
; Climate Change
; England
; Ephemeroptera
; Global Warming
; Nymph
; Oxygen
; Rivers
英文摘要: Aquatic ecological responses to climatic warming are complicated by interactions between thermal effects and other environmental stressors such as organic pollution and hypoxia. Laboratory experiments have demonstrated how oxygen limitation can set heat tolerance for some aquatic ectotherms, but only at unrealistic lethal temperatures and without field data to assess whether oxygen shortages might also underlie sublethal warming effects. Here, we test whether oxygen availability affects both lethal and nonlethal impacts of warming on two widespread Eurasian mayflies, Ephemera danica, Müller 1764 and Serratella ignita (Poda 1761). Mayfly nymphs are often a dominant component of the invertebrate assemblage in streams, and play a vital role in aquatic and riparian food webs. In the laboratory, lethal impacts of warming were assessed under three oxygen conditions. In the field, effects of oxygen availability on nonlethal impacts of warming were assessed from mayfly occurrence in 42 293 UK stream samples where water temperature and biochemical oxygen demand were measured. Oxygen limitation affected both lethal and sublethal impacts of warming in each species. Hypoxia lowered lethal limits by 5.5 °C (±2.13) and 8.2 °C (±0.62) for E. danica and S. ignita respectively. Field data confirmed the importance of oxygen limitation in warmer waters; poor oxygenation drastically reduced site occupancy, and reductions were especially pronounced under warm water conditions. Consequently, poor oxygenation lowered optimal stream temperatures for both species. The broad concordance shown here between laboratory results and extensive field data suggests that oxygen limitation not only impairs survival at thermal extremes but also restricts species abundance in the field at temperatures well below upper lethal limits. Stream oxygenation could thus control the vulnerability of aquatic ectotherms to global warming. Improving water oxygenation and reducing pollution can provide key facets of climate change adaptation for running waters. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61399
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Animal Ecology and Physiology, Radboud University Nijmegen, Heyendaalseweg, 135, AJ Nijmegen, Netherlands; Catchment Research Group, Cardiff School of Biosciences, Cardiff University, Cardiff, United Kingdom
Recommended Citation:
Verberk W.C.E.P.,Durance I.,Vaughan I.P.,et al. Field and laboratory studies reveal interacting effects of stream oxygenation and warming on aquatic ectotherms[J]. Global Change Biology,2016-01-01,22(5)