A global pattern of thermal adaptation in marine phytoplankton

Mridul K. Thomas, Colin T. Kremer, Christopher A. Klausmeier, Elena Litchman

Research output: Contribution to journalJournal articleResearchpeer-review


Rising ocean temperatures will alter the productivity and composition of marine phytoplankton communities, thereby affecting global biogeochemical cycles. Predicting the effects of future ocean warming on biogeochemical cycles depends critically on understanding how existing global temperature variation affects phytoplankton. Here we show that variation in phytoplankton temperature optima over 150 degrees of latitude is well explained by a gradient in mean ocean temperature. An eco-evolutionary model predicts a similar relationship, suggesting that this pattern is the result of evolutionary adaptation. Using mechanistic species distribution models, we find that rising temperatures this century will cause poleward shifts in species' thermal niches and a sharp decline in tropical phytoplankton diversity in the absence of an evolutionary response.
Original languageEnglish
Issue number6110
Pages (from-to)1085-1088
Publication statusPublished - 1 Nov 2012
Externally publishedYes


  • Adaptation,Global Warming,Hot Temperature,Physiological,Phytoplankton,Phytoplankton: growth development,growth development


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