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Title: Series 4: Aggregation of Thalassiosira weissflogii as a function of pCO2, temperature and bacteria

Type Dataset Passow, Uta, Seebah, Shalin (2013-09-05): Series 4: Aggregation of Thalassiosira weissflogii as a function of pCO2, temperature and bacteria. Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu. Dataset. https://darchive.mblwhoilibrary.org/handle/1912/6845

Authors: Passow, Uta ; Seebah, Shalin ;

Links

Summary

Increasing Transparent Exopolymer Particle (TEP) formation during diatom blooms as a result of elevated temperature and pCO2 have been suggested to result in enhanced aggregation and carbon flux, therewith potentially increasing the sequestration of carbon by the ocean. We present experimental results on TEP and aggregate formation by Thalassiosira weissflogii (diatom) in the presence or absence of bacteria under two temperature and three pCO2 scenarios. During the aggregation phase of the experiment TEP formation was elevated at the higher temperature (20ºC vs. 15ºC), as predicted. However, in contrast to expectations based on the established relationship between TEP and aggregation, aggregation rates and sinking velocity of aggregates were depressed in warmer treatments, especially under ocean acidification conditions. If our experimental findings can be extrapolated to natural conditions, they would imply a reduction in carbon flux and potentially reduced carbon sequestration after diatoms blooms in the future ocean.

More information

  • URI: https://hdl.handle.net/1912/6845
  • DOI: 10.1575/1912/6845
  • Language: en

Subjects

  • Ocean acidification, Temperature, Transparent exopolymer particles (TEP), Marine aggregates, Climate change, Diatom, Thalassiosira weissflogii, Marinobacter adhaerens HP15

Dates

  • accessioned: September 17, 2014
  • available: October 22, 2014
  • created: September 05, 2013
  • Publication date: September 05, 2013

Notes

The Series 4 Experiment, Aggregation of Thalassiosira weissflogii as a function of pCO2, temperature and bacteria, is made up of 2 phases. The Acclimatisation Phase and the Aggregation Phase. The Acclimatisation Phase has two components – The Carbonate System data and the Cell Counts Data. The Aggregation Phase also has two components – The Carbonate System + TEP data and the Sinking Velocity data. Note: For a complete list of measurements, refer to the supplemental document ' Series4_Field_names.pdf' . embargo: 2014-10-08

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Funding Information

AwardnumberAwarduriFunderidentifierFunderidentifiertypeFundername
This research was supported by NSF Grant: OCE-0926711

Format

electronic resource

Locations

KindValueGeopoint
34.4126 -119.8420

Relateditems

DescriptionItem typeRelationshipUri
https://hdl.handle.net/1912/6950ispartof
Not specifiedhttps://www.bco-dmo.org/dataset/4038
Not specifiedhttps://www.bco-dmo.org/dataset/528131
Not specifiedhttps://www.bco-dmo.org/dataset/528150
Not specifiedhttps://www.bco-dmo.org/dataset/528175