Effect of CO2, nutrients and light on coastal plankton.
MetadataShow full item record
AuthorsReul, A.; Muñoz, M.; Bautista, B.; Neale, P. J.; Sobrino, C.; Mercado-Carmona, J.M. (Jesús Mariano); Segovia, M.; Salles, S.; Kulk, G.; León, P.; van de Poll, W. H.; Pérez, E.; Buma, A.; Blanco, J. M.
We investigated the impacts of climate change-associated abiotic factors on the species composition and size structure of coastal phytoplankton communities. Surface coastal water collected off the coast of Málaga (Spain) was incubated outdoors during a 7 d microcosm experi - ment. The natural phytoplankton communities were exposed to high and low conditions of CO2, nutrients and light. During the first 2 d, a positive response to increased CO2 and nutrient concentration was observed in terms of abundance and chlorophyll in all size fractions (<2, 2 to 20, and >20 μm). After 2 d, a trophic cascade effect was observed within the phytoplankton communities for all treatments. The absence of mesozooplankton led to an increase in microzooplankton abundance, which coincided with a decrease in the abundance of phytoplankton <6 μm equivalent spherical dia meter (ESD). At the same time, an increased concentration of larger phytoplankton was ob - served. Consequently, a diatom bloom ...