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Other research product . Collection . 2019

Impacts of reduced inorganic N:P ratio on three distinct plankton communities in the Humboldt upwelling system

Spilling, Kristian;
Published: 01 Jan 2019
Publisher: PANGAEA

In an enclosure experiment, we employed two levels of inorganic NP ratios (10 and 5) for three distinct plankton communities collected along the coast of central Chile (33ºS). Each combination of community and NP level was replicated three times. The experiment lasted 12 days, and the data set include inorganic nutrients (NO3, PO4, DSi), particular organic carbon (POC), nitrogen (PON) and phosphorus (POP), Chlorophyll a, a range of fluorescence based measurements such as photochemical efficiency (Fv/Fm) and community data. The primary effect of the NP treatment was related to different concentrations of NO3, which directly influenced the biomass of phytoplankton. Additionally, low inorganic NP ratio reduced the seston NP and Chl a-C ratios, and there were some effects on the plankton community composition, e.g. benefitting Synechococcus spp in some communities.

Funded by
Association of European Marine Biological Laboratories
  • Funder: European Commission (EC)
  • Project Code: 227799
  • Funding stream: FP7 | SP4 | INFRA
AKA| Changing phytoplankton community composition and its effect on biogeochemical fluxes in the Baltic Sea
Related to Research communities
European Marine Science