Rising CO2 and increased light exposure synergistically reduce marine primary productivity

被引:295
作者
Gao, Kunshan [1 ]
Xu, Juntian [1 ,2 ]
Gao, Guang [1 ]
Li, Yahe [1 ]
Hutchins, David A. [3 ]
Huang, Bangqin [1 ]
Wang, Lei [1 ]
Zheng, Ying [1 ]
Jin, Peng [1 ]
Cai, Xiaoni [1 ]
Haeder, Donat-Peter
Li, Wei [1 ]
Xu, Kai [1 ]
Liu, Nana [1 ]
Riebesell, Ulf [4 ]
机构
[1] Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
[2] Huaihai Inst Technol, Sch Marine Sci & Technol, Lianyungang 222005, Peoples R China
[3] Univ So Calif, Dept Biol Sci, Los Angeles, CA 90089 USA
[4] Helmholtz Ctr Ocean Res Kiel GEOMAR, D-24105 Kiel, Germany
基金
美国国家科学基金会; 中国国家自然科学基金;
关键词
SOLAR UV-RADIATION; OCEAN ACIDIFICATION; CARBON ACQUISITION; ANTHROPOGENIC CO2; ATMOSPHERIC CO2; PHYTOPLANKTON; DIATOMS; PHOTOSYNTHESIS; CALCIFICATION; FIXATION;
D O I
10.1038/NCLIMATE1507
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Carbon dioxide and light are two major prerequisites of photosynthesis. Rising CO2 levels in oceanic surface waters in combination with ample light supply are therefore often considered stimulatory to marine primary production(1-3). Here we show that the combination of an increase in both CO2 and light exposure negatively impacts photosynthesis and growth of marine primary producers. When exposed to CO2 concentrations projected for the end of this century(4), natural phytoplankton assemblages of the South China Sea responded with decreased primary production and increased light stress at light intensities representative of the upper surface layer. The phytoplankton community shifted away from diatoms, the dominant phytoplankton group during our field campaigns. To examine the underlying mechanisms of the observed responses, we grew diatoms at different CO2 concentrations and under varying levels (5-100%) of solar radiation experienced by the phytoplankton at different depths of the euphotic zone. Above 22-36% of incident surface irradiance, growth rates in the high-CO2-grown cells were inversely related to light levels and exhibited reduced thresholds at which light becomes inhibitory. Future shoaling of upper-mixed-layer depths will expose phytoplankton to increased mean light intensities(5). In combination with rising CO2 levels, this may cause a widespread decline in marine primary production and a community shift away from diatoms, the main algal group that supports higher trophic levels and carbon export in the ocean.
引用
收藏
页码:519 / 523
页数:5
相关论文
共 34 条
[1]   Sensitivity of coccolithophores to carbonate chemistry and ocean acidification [J].
Beaufort, L. ;
Probert, I. ;
de Garidel-Thoron, T. ;
Bendif, E. M. ;
Ruiz-Pino, D. ;
Metzl, N. ;
Goyet, C. ;
Buchet, N. ;
Coupel, P. ;
Grelaud, M. ;
Rost, B. ;
Rickaby, R. E. M. ;
de Vargas, C. .
NATURE, 2011, 476 (7358) :80-83
[2]   Climate-driven trends in contemporary ocean productivity [J].
Behrenfeld, Michael J. ;
O'Malley, Robert T. ;
Siegel, David A. ;
McClain, Charles R. ;
Sarmiento, Jorge L. ;
Feldman, Gene C. ;
Milligan, Allen J. ;
Falkowski, Paul G. ;
Letelier, Ricardo M. ;
Boss, Emmanuel S. .
NATURE, 2006, 444 (7120) :752-755
[3]   Global phytoplankton decline over the past century [J].
Boyce, Daniel G. ;
Lewis, Marlon R. ;
Worm, Boris .
NATURE, 2010, 466 (7306) :591-596
[4]   Beyond ocean acidification [J].
Boyd, Philip W. .
NATURE GEOSCIENCE, 2011, 4 (05) :273-274
[5]   Environmental control of open-ocean phytoplankton groups: Now and in the future [J].
Boyd, Philip W. ;
Strzepek, Robert ;
Fu, Feixue ;
Hutchins, David A. .
LIMNOLOGY AND OCEANOGRAPHY, 2010, 55 (03) :1353-1376
[6]   Modelling regional responses by marine pelagic ecosystems to global climate change [J].
Boyd, PW ;
Doney, SC .
GEOPHYSICAL RESEARCH LETTERS, 2002, 29 (16) :53-1
[7]   Anthropogenic carbon and ocean pH [J].
Caldeira, K ;
Wickett, ME .
NATURE, 2003, 425 (6956) :365-365
[8]   Solar ultraviolet radiation and CO2-induced ocean acidification interacts to influence the photosynthetic performance of the red tide alga Phaeocystis globosa (Prymnesiophyceae) [J].
Chen, Shanwen ;
Gao, Kunshan .
HYDROBIOLOGIA, 2011, 675 (01) :105-117
[9]   Characterization of diurnal photosynthetic rhythms in the marine diatom Skeletonema costatum grown in synchronous culture under ambient and elevated CO2 [J].
Chen, XW ;
Gao, KS .
FUNCTIONAL PLANT BIOLOGY, 2004, 31 (04) :399-404
[10]   Impact of anthropogenic CO2 on the CaCO3 system in the oceans [J].
Feely, RA ;
Sabine, CL ;
Lee, K ;
Berelson, W ;
Kleypas, J ;
Fabry, VJ ;
Millero, FJ .
SCIENCE, 2004, 305 (5682) :362-366