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Biological ramifications of climate-change-mediated oceanic multi-stressors
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Biological ramifications of climate-change-mediated oceanic multi-stressors
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Journal Article
Biological ramifications of climate-change-mediated oceanic multi-stressors
2015
Overview
Climate change is altering oceanic conditions in a complex manner, and the concurrent amendment of multiple properties will modify environmental stress for primary producers. So far, global modelling studies have focused largely on how alteration of individual properties will affect marine life. Here, we use global modelling simulations in conjunction with rotated factor analysis to express model projections in terms of regional trends in concomitant changes to biologically influential multi-stressors. Factor analysis demonstrates that regionally distinct patterns of complex oceanic change are evident globally. Preliminary regional assessments using published evidence of phytoplankton responses to complex change reveal a wide range of future responses to interactive multi-stressors with <20–300% shifts in phytoplankton physiological rates, and many unexplored potential interactions. In a future ocean, provinces will encounter different permutations of change that will probably alter the dominance of key phytoplankton groups and modify regional productivity, ecosystem structure and biogeochemistry. Consideration of regionally distinct multi-stressor patterns can help guide laboratory and field studies as well as the interpretation of interactive multi-stressors in global models.
Modelling studies of climate change impacts on phytoplankton typically consider individual properties, which ignores the complex nature of the marine environment. This work undertakes regional assessments using multiple properties, including interactions, and finds shifts of <20–300% in phytoplankton physiological rates.
Publisher
Nature Publishing Group UK,Nature Publishing Group
