Distributions and Abundances of Sublineages of the N₂-Fixing Cyanobacterium Candidatus Atelocyanobacterium thalassa (UCYN-A) in the New Caledonian Coral Lagoon.

ABSTRACT: Nitrogen (N₂) fixation is a major source of nitrogen that supports primary production in the vast oligotrophic areas of the world's oceans. The Western Tropical South Pacific has recently been identified as a hotspot for N₂ fixation. In the Noumea lagoon (New Caledonia), high abundances of the unicellular N₂-fixing cyanobacteria group A (UCYN-A), coupled with daytime N₂ fixation rates associated with the <10 μm size fraction, suggest UCYN-A may be an important diazotroph (N₂-fixer) in this region. However, little is known about the seasonal variability and diversity of UCYN-A there. To assess this, surface waters from a 12 km transect from the mouth of the Dumbea River to the Dumbea Pass were sampled monthly between July 2012 and March

SUBMITTER: Henke BA 

PROVIDER: S-EPMC5895702 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature