Differential effects of ocean acidification on growth and photosynthesis among phylotypes of Symbiodinium (Dinophyceae)

被引:139
作者
Brading, Patrick [1 ]
Warner, Mark E. [2 ]
Davey, Phillip [1 ]
Smith, David J. [1 ]
Achterberg, Eric P. [3 ]
Suggett, David J. [1 ]
机构
[1] Univ Essex, Dept Biol Sci, Coral Reef Res Unit, Colchester CO4 3SQ, Essex, England
[2] Univ Delaware, Coll Earth Ocean & Environm, Lewes, DE 19958 USA
[3] Univ Southampton, Sch Ocean & Earth Sci, Natl Oceanog Ctr Southampton, Southampton, Hants, England
基金
英国自然环境研究理事会; 美国国家科学基金会;
关键词
CORAL-DINOFLAGELLATE ASSOCIATION; CO2 CONCENTRATING MECHANISMS; FREE-LIVING SYMBIODINIUM; EMILIANIA-HUXLEYI; INORGANIC CARBON; GENUS SYMBIODINIUM; ELEMENTAL RATIOS; REEF CORALS; DIVERSITY; PHYTOPLANKTON;
D O I
10.4319/lo.2011.56.3.0927
中图分类号
Q [生物科学];
学科分类号
090105 [作物生产系统与生态工程];
摘要
We investigated the effect of elevated partial pressure of CO2 (pCO(2)) on the photosynthesis and growth of four phylotypes (ITS2 types A1, A13, A2, and B1) from the genus Symbiodinium, a diverse dinoflagellate group that is important, both free-living and in symbiosis, for the viability of cnidarians and is thus a potentially important model dinoflagellate group. The response of Symbiodinium to an elevated pCO(2) was phylotype-specific. Phylotypes A1 and B1 were largely unaffected by a doubling in pCO(2); in contrast, the growth rate of A13 and the photosynthetic capacity of A2 both increased by similar to 60%. In no case was there an effect of ocean acidification (OA) upon respiration (dark-or light-dependent) for any of the phylotypes examined. Our observations suggest that OA might preferentially select among free-living populations of Symbiodinium, with implications for future symbioses that rely on algal acquisition from the environment (i.e., horizontal transmission). Furthermore, the carbon environment within the host could differentially affect the physiology of different Symbiodinium phylotypes. The range of responses we observed also highlights that the choice of species is an important consideration in OA research and that further investigation across phylogenetic diversity, for both the direction of effect and the underlying mechanism(s) involved, is warranted.
引用
收藏
页码:927 / 938
页数:12
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