scholarly journals The pathways and properties of the Amazon River Plume in the tropical North Atlantic Ocean

2013 ◽  
Vol 118 (12) ◽  
pp. 6894-6913 ◽  
Author(s):  
Victoria J. Coles ◽  
Maureen T. Brooks ◽  
Julia Hopkins ◽  
Michael R. Stukel ◽  
Patricia L. Yager ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
River Plume ◽  
Amazon River ◽  
Tropical North Atlantic ◽  
Amazon River Plume

scholarly journals Influence of the Amazon River plume on distributions of free-living and symbiotic cyanobacteria in the western tropical north Atlantic Ocean

2007 ◽  
Vol 52 (2) ◽  
pp. 517-532 ◽  
Author(s):  
R. A. Foster ◽  
A. Subramaniam ◽  
C. Mahaffey ◽  
E. J. Carpenter ◽  
D. G. Capone ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
River Plume ◽  
Amazon River ◽  
Free Living ◽  
Tropical North Atlantic ◽  
Amazon River Plume

scholarly journals The distribution of thiamin and pyridoxine in the western tropical North Atlantic Amazon River plume

2013 ◽  
Vol 4 ◽  
Author(s):  
Laila P. Barada ◽  
Lynda Cutter ◽  
Joseph P. Montoya ◽  
Eric A. Webb ◽  
Douglas G. Capone ◽  
...  
Keyword(s):  
North Atlantic ◽  
River Plume ◽  
Amazon River ◽  
Tropical North Atlantic ◽  
Amazon River Plume

scholarly journals Meso- and microzooplankton grazing in the Amazon River plume and western tropical North Atlantic

2016 ◽  
Vol 61 (3) ◽  
pp. 825-840 ◽  
Author(s):  
Brandon J. Conroy ◽  
Deborah K. Steinberg ◽  
Michael R. Stukel ◽  
Joaquim I. Goes ◽  
Victoria J. Coles
Keyword(s):  
North Atlantic ◽  
River Plume ◽  
Amazon River ◽  
Tropical North Atlantic ◽  
Amazon River Plume ◽  
Microzooplankton Grazing

scholarly journals Mesozooplankton Graze on Cyanobacteria in the Amazon River Plume and Western Tropical North Atlantic

2017 ◽  
Vol 8 ◽  
Author(s):  
Brandon J. Conroy ◽  
Deborah K. Steinberg ◽  
Bongkuen Song ◽  
Andrew Kalmbach ◽  
Edward J. Carpenter ◽  
...  
Keyword(s):  
North Atlantic ◽  
River Plume ◽  
Amazon River ◽  
Tropical North Atlantic ◽  
Amazon River Plume

scholarly journals Amazon River enhances diazotrophy and carbon sequestration in the tropical North Atlantic Ocean

2008 ◽  
Vol 105 (30) ◽  
pp. 10460-10465 ◽  
Author(s):  
A. Subramaniam ◽  
P. L. Yager ◽  
E. J. Carpenter ◽  
C. Mahaffey ◽  
K. Bjorkman ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Atlantic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Amazon River ◽  
Tropical North Atlantic

scholarly journals Small pigmented eukaryote assemblages of the western tropical North Atlantic around the Amazon River plume during spring discharge

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sophie Charvet ◽  
Eunsoo Kim ◽  
Ajit Subramaniam ◽  
Joseph Montoya ◽  
Solange Duhamel
Keyword(s):  
North Atlantic ◽  
High Throughput Sequencing ◽  
Taxonomic Composition ◽  
River Plume ◽  
Marine Phytoplankton ◽  
Amazon River ◽  
Spring Discharge ◽  
Habitat Types ◽  
Tropical North Atlantic ◽  
Amazon River Plume

AbstractSmall pigmented eukaryotes (⩽ 5 µm) are an important, but overlooked component of global marine phytoplankton. The Amazon River plume delivers nutrients into the oligotrophic western tropical North Atlantic, shades the deeper waters, and drives the structure of microphytoplankton (> 20 µm) communities. For small pigmented eukaryotes, however, diversity and distribution in the region remain unknown, despite their significant contribution to open ocean primary production and other biogeochemical processes. To investigate how habitats created by the Amazon river plume shape small pigmented eukaryote communities, we used high-throughput sequencing of the 18S ribosomal RNA genes from up to five distinct small pigmented eukaryote cell populations, identified and sorted by flow cytometry. Small pigmented eukaryotes dominated small phytoplankton biomass across all habitat types, but the population abundances varied among stations resulting in a random distribution. Small pigmented eukaryote communities were consistently dominated by Chloropicophyceae (0.8–2 µm) and Bacillariophyceae (0.8–3.5 µm), accompanied by MOCH-5 at the surface or by Dinophyceae at the chlorophyll maximum. Taxonomic composition only displayed differences in the old plume core and at one of the plume margin stations. Such results reflect the dynamic interactions of the plume and offshore oceanic waters and suggest that the resident small pigmented eukaryote diversity was not strongly affected by habitat types at this time of the year.

scholarly journals A quest for the biological sources of long chain alkyl diols in the western tropical North Atlantic Ocean

2018 ◽  
Vol 15 (19) ◽  
pp. 5951-5968 ◽  
Author(s):  
Sergio Balzano ◽  
Julie Lattaud ◽  
Laura Villanueva ◽  
Sebastiaan W. Rampen ◽  
Corina P. D. Brussaard ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Water Column ◽  
North Atlantic ◽  
18S Rrna ◽  
North Atlantic Ocean ◽  
18S Rrna Gene ◽  
Rrna Gene ◽  
Tropical North Atlantic ◽  
Biological Sources ◽  
Long Chain

Abstract. Long chain alkyl diols (LCDs) are widespread in the marine water column and sediments, but their biological sources are mostly unknown. Here we combine lipid analyses with 18S rRNA gene amplicon sequencing on suspended particulate matter (SPM) collected in the photic zone of the western tropical North Atlantic Ocean at 24 stations to infer relationships between LCDs and potential LCD producers. The C30 1,15-diol was detected in all SPM samples and accounted for >95 % of the total LCDs, while minor proportions of C28 and C30 1,13-diols, C28 and C30 1,14-diols, as well as C32 1,15-diol were found. The concentration of the C30 and C32 diols was higher in the mixed layer of the water column compared to the deep chlorophyll maximum (DCM), whereas concentrations of C28 diols were comparable. Sequencing analyses revealed extremely low contributions (≈0.1 % of the 18S rRNA gene reads) of known LCD producers, but the contributions from two taxonomic classes with which known producers are affiliated, i.e. Dictyochophyceae and Chrysophyceae, followed a trend similar to that of the concentrations of C30 and C32 diols. Statistical analyses indicated that the abundance of 4 operational taxonomic units (OTUs) of the Chrysophyceae and Dictyochophyceae, along with 23 OTUs falling into other phylogenetic groups, were weakly (r≤0.6) but significantly (p value <0.01) correlated with C30 diol concentrations. It is not clear whether some of these OTUs might indeed correspond to C28−32 diol producers or whether these correlations are just indirect and the occurrence of C30 diols and specific OTUs in the same samples might be driven by other environmental conditions. Moreover, primer mismatches were unlikely, but cannot be excluded, and the variable number of rRNA gene copies within eukaryotes might have affected the analyses leading to LCD producers being undetected or undersampled. Furthermore, based on the average LCD content measured in cultivated LCD-producing algae, the detected concentrations of LCDs in SPM are too high to be explained by the abundances of the suspected LCD-producing OTUs. This is likely explained by the slower degradation of LCDs compared to DNA in the oxic water column and suggests that some of the LCDs found here were likely to be associated with suspended debris, while the DNA from the related LCD producers had been already fully degraded. This suggests that care should be taken in constraining biological sources of relatively stable biomarker lipids by quantitative comparisons of DNA and lipid abundances.

Sign in / Sign up

Export Citation Format

Share Document