Effects of C02 driven ocean acidification on ontogenetic stages of the cutllefisii SEPIA OFFICINALIS

• Main Author: Hu, Marian Yong-An
• Format: Article in Journal/Newspaper
• Language: English
• Published: Laboratoire Arago 2016
• Subjects: Ocean acidification
• Online Access: https://oceanrep.geomar.de/id/eprint/41378/; https://oceanrep.geomar.de/id/eprint/41378/1/Hu2016.pdf

Occan acidification due to anthropogenic emissions of CO, is the rew kid on the block of climate change research and has received considerable attention as changes in seawater acidity and carbonate chemistry caa severely affect marine organisms from the species to the ecosystem level. The degree of sensitivity within a species can vary greatly aloeg ontogeny. olVr leading to highest sensitivities .n early life stages Recent ssadies using the cuttlefish Septa officinalis, demonstrated that it's oviparous developmental mode can constitute an additional dulSenge for early life stages as increases in environmental pCO, add on top lo the already high COj concentration irtiide the egg The nucnxnvironment inside the egg is characterized by low pH. hypoxia, hypercapnia and high ammonia concentrations as a result of the animal's metabolism and the limited diffusion permeability of the egg capsule. This oviparous developmental mode ia combination with tower pH regulatory capacities are probably the major reasons why S officinalis embryo∗ respond more sensitively towards seanater acidification compared to adalts Although stronger hypercapnia levels (>0.3 kPa; < pH 75) could demonstrate potentially negative effects on the development, metabolism and calcification, acidification levels as predicted for the coming century will probably not severely affect S. officinalis. This relative tolerance may be a consequence of a lifestyle in benthac coastal habitats, pre- Adapiiag S. officinalis to natural fluctuations in environmental. Effects of C02 driven ocean acidification on ontogenetic stages of the cutllefisii SEPIA OFFICINALIS (PDF Download Available). Available from: https://www.researchgate.net/publication/304749386_Effects_of_C02_driven_ocean_acidification_on_ontogenetic_stages_of_the_cutllefisii_SEPIA_OFFICINALIS [accessed Jan 10 2018].