Thermal acclimation and adaptation of key phytoplankton groups and interactions with other global change variables ...

• Main Author: Qu, Pingping author
• Format: Thesis
• Language: English
• Published: University of Southern California Digital Library (USC.DL) 2019
• Subjects: Biology Marine Biology and Biological Oceanography degree program; Doctor of Philosophy degree; College of Letters, Arts and Sciences school; Ocean acidification
• Online Access: https://dx.doi.org/10.25549/usctheses-c89-184704; https://digitallibrary.usc.edu/asset-management/2A3BF1WJEKX3

Several functional groups of marine phytoplankton groups play especially critical roles in global primary productivity, carbon export and biogeochemistry. In particular, diatoms substantially contribute to primary production, carbon sequestration and the food web. Diazotrophic cyanobacteria are equally important as a source of new nitrogen (N) through nitrogen fixation. The relationship between environmental forcing and these key marine phytoplankton groups needs more attention, especially in the context of future global change. ? Elevated atmospheric concentrations of the greenhouse gas carbon dioxide (CO?) are bringing about ocean acidification and giving rise to sea surface warming. By the end of this century, atmospheric CO? concentration is predicted to rise from current levels of ?415 parts per million (ppm) to 800-1150 ppm, while average surface seawater temperatures will increase by 2-4?. Global warming will also result in indirect changes, such as intensified stratification of seawater, increased ...