Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 693, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.07.282
Keywords
Climate change; Intertidal species; Larval development; Larval settlement; Physiological traits
Categories
Funding
- EU-FP7 MedSeA project [265103]
- project PRIN TETRIS 2010 (Italian Ministry of University and Research, MIUR)
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Expected temperature rise and seawater pH decrease may affect marine organism fitness. By a transplant experiment involving air-temperature manipulation along a natural CO2 gradient, we investigated the effects of high pCO(2) (similar to 1100 mu atm) and elevated temperature (up to +2 degrees C than ambient conditions) on the reproductive success, recruitment, growth, shell chemical composition and oxygen consumption of the early life stages of the intertidal reef-building vermetid Dendropoma cristatum. Reproductive success was predominantly affected by temperature increase, with encapsulated embryos exhibiting higher survival in control than elevated temperature conditions, which were in turn unaffected by altered seawater pH levels. Decreasing pH (alone or in combination with temperature) significantly affected the shell growth and shell chemical composition of both embryos and recruits. Elevated temperatures along with lower pH led to decreases of similar to 30% oxygen consumption and similar to 60% recruitment. Our results suggest that the early life stages of the reef-builder D. cristatum are highly sensitive to expected environmental change, with major consequences on the intertidal vermetid reefs they build and indirectly on the high biodiversity levels they support. (C) 2019 Elsevier B.V. All rights reserved.
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