Hydrochemistry measured on water bottle samples during METEOR cruise M10/1, supplement to: Passow, Uta; Peinert, Rolf (1993): The role of plankton in particle flux; two case studies from the northeast Atlantic. Deep Sea Research Part II: Topical Studies in Oceanography, 40(1-2), 573-585


The relationship between the vertical flux of microplankton and its standing stock in the upper ocean was determined in the subtropical (33°N, 21°W) and tropical (18°N, 30°W) northeast Atlantic in spring 1989 as part of the North Atlantic Bloom Experiment.In the subtropical area specific sedimentation rates at all depths were low (0.1% of standing stock) and 10-20% of settled particulate organic carbon (POC) was viable diatoms. The high contribution of viable diatoms, their empty frustules and tintinnid loricae to settled material characterized a system in transition between a diatom bloom sedimentation event and an oligotrophic summer situation.In the tropical area specific sedimentation rates were similar, but absolute rates (3 mg C m?2 day?1) were only about a third of those in the subtropical area. Microplankton carbon contributed only 2-6% to POC. Hard parts of heterotrophs found embedded in amorphous detrital matter suggest that particles had passed through a complex food web prior to sedimentation. Coccolithophorids, not diatoms dominated the autotrophic fraction in traps, and a shift in the composition of autotrophs may indicate a perturbation of the oligotrophic system.

DOI https://doi.org/10.1594/PANGAEA.65476
Related Identifier https://doi.org/10.1016/0967-0645(93)90033-J
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.65476
Creator Passow, Uta; Peinert, Rolf
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 1993
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Size 1700 data points
Discipline Earth System Research
Spatial Coverage (-30.605W, 18.335S, -20.960E, 33.923N)
Temporal Coverage Begin 1989-03-27T08:04:00Z
Temporal Coverage End 1989-04-24T10:22:00Z