Linking phytoplankton community composition to seasonal changes in f ratio

ABSTRACT: Seasonal changes in nitrogen assimilation have been studied in the western English Channel by sampling at approximately weekly intervals for 12 months. Nitrate concentrations showed strong seasonal variations. Available nitrogen in the winter was dominated by nitrate but this was close to limit of detection from May to September, after the spring phytoplankton bloom. 15N uptake experiments showed that nitrate was the nitrogen source for the spring phytoplankton bloom but regenerated nitrogen supported phytoplankton productivity throughout the summer. The average annual f ratio was 0.35, which demonstrated the importance of ammonia regeneration in this dynamic temperate region. Nitrogen uptake rate measurements were related to the phytoplankton responsible by assessing the relative abundanc

ORGANISM(S): synthetic construct

SUBMITTER: Bess Ward 

PROVIDER: E-GEOD-27998 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress