期刊
MARINE ENVIRONMENTAL RESEARCH
卷 93, 期 -, 页码 70-77出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2013.07.008
关键词
Climate change; Ocean warming; Ocean acidification; Calcification; Sea urchin
资金
- M.A.T.T.M. (Ministero dell'Ambiente Difesa del Territorio e del Mare)
- Linnaeus Centre for Marine Evolutionary Biology at the University of Gothenburg
- Swedish Research Council VR
- Swedish Research Council Formas
The increasing abundances of the thermophilous black sea urchin Arbacia lixula in the Mediterranean Sea are attributed to the Western Mediterranean warming. However, few data are available on the potential impact of this warming on A. lixula in combination with other global stressors such as ocean acidification. The aim of this study is to investigate the interactive effects of increased temperature and of decreased pH on fertilization and early development of A. lixula. This was tested using a fully crossed design with four temperatures (20, 24, 26 and 27 degrees C) and two pH levels (pH(NBS) 8.2 and 7.9). Temperature and pH had no significant effect on fertilization and larval survival (2d) for temperature <27 degrees C. At 27 degrees C, the fertilization success was very low (<1%) and all larvae died within 2d. Both temperature and pH had effects on the developmental dynamics. Temperature appeared to modulate the impact of decreasing pH on the % of larvae reaching the pluteus stage leading to a positive effect (faster growth compared to pH 8.2) of low pH at 20 degrees C, a neutral effect at 24 degrees C and a negative effect (slower growth) at 26 degrees C. These results highlight the importance of considering a range of temperatures covering today and the future environmental variability in any experiment aiming at studying the impact of ocean acidification. (C) 2013 Elsevier Ltd. All rights reserved.
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