Marine & Environmental Sciences Faculty Articles

In Situ Determination of Cellular DMSP and Pigment Quotas in a Prorocentrum Minimum Bloom near the Falkland Islands

ORCID

0000-0003-3556-7616

Document Type

Article

Publication Title

Advances in Oceanography and Limnology

ISSN

1947-5721

Publication Date

10-16-2014

Keywords

Dimethylsulfoniopropionate, Patagonian shelf, Dinoflagellate, Pigments, Sorting flow cytometer

Abstract

Marine phytoplankton play critical roles in the biogeochemistry of open and coastal oceans. However, the impact that individual species have on an ecosystem-wide scale can strongly depend on the production of cellular compounds, especially those that are climatically active such as dimethylsulfide (DMS). Herein, we use sorting flow cytometry to separate a distinct phytoplankton population from four samples taken along the Patagonian shelf near the Falkland Islands. Morphological, genetic, and biochemical analyses demonstrated that three of the sorted samples were dominated by a bloom of the dinoflagellate Prorocentrum minimum. Cellular quotas of the DMS-precursor dimethylsulfoniopropionate (DMSP) ranged from 1.23–4.11 pg cell−1 in the same population at different sampling stations. Causes of this variability may be due to different growth stages of the P. minimum bloom or changes in other environmental variables. Overall, in situ intracellular DMSP concentrations were lower than what would be expected based on previous, culture-based measurements. We demonstrate the difficulties inherent in sorting individual phytoplankton species from natural samples in order to determine in situ species-specific cellular quotas of important biogeochemical compounds.

DOI

10.1080/19475721.2014.968620

Volume

5

Issue

2

First Page

123

Last Page

140

Comments

©2014 Informa UK Limited

Additional Comments

NSF grant #s: 0848882, ANT-0739446

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Peer Reviewed

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