An expected global change scenario, with increases in sea-surface temperature up to 4ºC, increases in nutrients inputs, through atmospheric deposition and/or riverine inputs and ultraviolet radiation (UVR) levels, would differentially benefit some phytoplanktonic groups (i.e., diatoms and haptophytes) faced to others (dinoflagellates and chlorophytes). A generalized response not only would affect primary productivity but it also affect the trophic interactions in coastal and estuarine ecosystems, which are between the most productives areas around the world.
The study shows how a combined impact of UVR, nutrients inputs and temperature affects processes in photosystem II (PSII) (i.e, photosynthesis [P], PSII-inhibition [k] and recovery [r]) (chloroplast, green) and respiratory process (mitocondria, orange) in Alexandrium tamarense, Chaetoceros gracilis, Dunaliella salina.
Full reference:
Marco J. Cabrerizo, Presentación Carrillo, Virginia E. Villafañe, E.Walter Helbling. 2014. Current and predicted global change impacts of UVR, temperature and nutrient inputs on photosynthesis and respiration of key marine phytoplankton groups. Journal of Experimental Marine Biology and Ecology 461:371–380
Funding
This work was supported by Agencia Nacional de Promoción Científica and Tecnológica (ANPCyT), Consejo Nacional de Investigaciones Científicas and Técnicas (CONICET) of Argentina, Ministerio de Ciencia and Innovación of Spain through CGL2011-23681 project and a Spanish government predoctoral fellowship (FPU12/01243) and by Fundación Playa Unión.