DOI: 10.1111/gcb.13730
论文题名: Temperature regulation of marine heterotrophic prokaryotes increases latitudinally as a breach between bottom-up and top-down controls
作者: Morán X.A.G. ; Gasol J.M. ; Pernice M.C. ; Mangot J.-F. ; Massana R. ; Lara E. ; Vaqué D. ; Duarte C.M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期: 9 起始页码: 3956
结束页码: 3964
语种: 英语
英文关键词: bacterioplankton
; bottom-up
; heterotrophic prokaryotes
; latitudinal gradients
; microbial oceanography
; ocean warming
; temperature control
; top-down
Scopus关键词: Prokaryota
英文摘要: Planktonic heterotrophic prokaryotes make up the largest living biomass and process most organic matter in the ocean. Determining when and where the biomass and activity of heterotrophic prokaryotes are controlled by resource availability (bottom-up), predation and viral lysis (top-down) or temperature will help in future carbon cycling predictions. We conducted an extensive survey across subtropical and tropical waters of the Atlantic, Indian and Pacific Oceans during the Malaspina 2010 Global Circumnavigation Expedition and assessed indices for these three types of controls at 109 stations (mostly from the surface to 4,000 m depth). Temperature control was approached by the apparent activation energy in eV (ranging from 0.46 to 3.41), bottom-up control by the slope of the log-log relationship between biomass and production rate (ranging from −0.12 to 1.09) and top-down control by an index that considers the relative abundances of heterotrophic nanoflagellates and viruses (ranging from 0.82 to 4.83). We conclude that temperature becomes dominant (i.e. activation energy >1.5 eV) within a narrow window of intermediate values of bottom-up (0.3–0.6) and top-down 0.8–1.2) controls. A pervasive latitudinal pattern of decreasing temperature regulation towards the Equator, regardless of the oceanic basin, suggests that the impact of global warming on marine microbes and their biogeochemical function will be more intense at higher latitudes. Our analysis predicts that 1°C ocean warming will result in increased biomass of heterotrophic prokaryoplankton only in waters with <26°C of mean annual surface temperature. © 2017 The Authors. Global Change Biology Published by John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60814
Appears in Collections: 影响、适应和脆弱性
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作者单位: Biological and Environmental Sciences and Engineering Division (BESE), Red Sea Research Center, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia; Institut de Ciències del Mar, CSIC, Barcelona, Catalonia, Spain; University of Stockholm, Stockholm, Sweden; Institute of Marine Sciences (CNR-ISMAR), National Research Council, Venezia, Italy
Recommended Citation:
Morán X.A.G.,Gasol J.M.,Pernice M.C.,et al. Temperature regulation of marine heterotrophic prokaryotes increases latitudinally as a breach between bottom-up and top-down controls[J]. Global Change Biology,2017-01-01,23(9)