DOI: 10.1111/gcb.14033
Scopus记录号: 2-s2.0-85042585381
论文题名: Temperature-driven selection on metabolic traits increases the strength of an algal–grazer interaction in naturally warmed streams
作者: Schaum C.E. ; ffrench-Constant R. ; Lowe C. ; Ólafsson J.S. ; Padfield D. ; Yvon-Durocher G. ; Ashton Y. ; Botoli R. ; Coles P. ; Crisp J. ; Dwan E. ; Enoch-Pledger S. ; Flello B. ; Freegard K. ; Haines C. ; Holland M. ; Lear L. ; Lokuciejewski E. ; McPhee H. ; Newport T. ; Pahk L. ; Somers S. ; Swindells C. ; Wild M. ; Wrigglesworth E. ; Student Research Team
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 4 起始页码: 1793
结束页码: 1803
语种: 英语
英文关键词: consumer–resource interactions
; global warming
; interaction strength
; metabolism
; thermal adaptation
Scopus关键词: adaptation
; alga
; consumer-resource interaction
; global warming
; metabolism
; population dynamics
; streamwater
; temperature gradient
; algae
; Gastropoda
; Radix balthica
英文摘要: Trophic interactions are important determinants of the structure and functioning of ecosystems. Because the metabolism and consumption rates of ectotherms increase sharply with temperature, there are major concerns that global warming will increase the strength of trophic interactions, destabilizing food webs, and altering ecosystem structure and function. We used geothermally warmed streams that span an 11°C temperature gradient to investigate the interplay between temperature-driven selection on traits related to metabolism and resource acquisition, and the interaction strength between the keystone gastropod grazer, Radix balthica, and a common algal resource. Populations from a warm stream (~28°C) had higher maximal metabolic rates and optimal temperatures than their counterparts from a cold stream (~17°C). We found that metabolic rates of the population originating from the warmer stream were higher across all measurement temperatures. A reciprocal transplant experiment demonstrated that the interaction strengths between the grazer and its algal resource were highest for both populations when transplanted into the warm stream. In line with the thermal dependence of respiration, interaction strengths involving grazers from the warm stream were always higher than those with grazers from the cold stream. These results imply that increases in metabolism and resource consumption mediated by the direct, thermodynamic effects of higher temperatures on physiological rates are not mitigated by metabolic compensation in the long term, and suggest that warming could increase the strength of algal–grazer interactions with likely knock-on effects for the biodiversity and productivity of aquatic ecosystems. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110450
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall, United Kingdom; Section Biological Oceanography, Institute for Hydrobiology and Fisheries, University of Hamburg, Hamburg, Germany; Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, Cornwall, United Kingdom; Marine and Freshwater Research Institute, Reykjavik, Iceland
Recommended Citation:
Schaum C.E.,ffrench-Constant R.,Lowe C.,et al. Temperature-driven selection on metabolic traits increases the strength of an algal–grazer interaction in naturally warmed streams[J]. Global Change Biology,2018-01-01,24(4)