Keynote lecture: Oceans under climate change: effects of warming, hypoxia and acidification on marine animals

Climate change and its effects on marine ecosystems emphasize the need for a common understanding of the climate sensitivity of marine organisms by physiologists and ecologists. The whole organism responses to climate warming link to ecosystem response and build on a suite of tissue, cellular, molecular and genomic events, in a systemic to molecular hierarchy of limitation. All of these are involved in setting limits to tolerance, shaping a species-specific, limited budget of tolerance over time beyond pejus limits. The limiting mechanisms are also the targets of processes shaping acclimatisation and evolutionary adaptation. The concept of oxygen and capacity limitation of thermal tolerance (OCLTT) was proposed as a matrix integrating the levels of biological organisation and the synergistic effects of environmental stressors including ocean acidification (Pörtner et al., 2002, 2004, 2010). Adaptation to various climate regimes becomes visible in the positioning and width of thermal windows on the temperature scale. It will be discussed how such mechanistic understanding provides benefits to the assessment of climate change impacts on marine living resources and associated tools for management and policy.



Pörtner H.O., 2012. Keynote lecture: Oceans under climate change: effects of warming, hypoxia and acidification on marine animals. 28th Congress – European Society for Comparative Physiology and Biochemistry – Cellular and molecular mechanisms for physiological adaptation to multiple stress Bilbao, 2-5 September 2012. Abstract.


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