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Phytoplankton production and grazing balances in the Costa Rica Dome.

Title: Phytoplankton production and grazing balances in the Costa Rica Dome.
Name(s): Landry, Michael R, author
Selph, Karen E, author
Décima, Moira, author
Gutiérrez-Rodríguez, Andrés, author
Stukel, Michael R, author
Taylor, Andrew G, author
Pasulka, Alexis L, author
Type of Resource: text
Genre: Journal Article
Date Issued: 2016-03-01
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: We investigated phytoplankton production rates and grazing fates in the Costa Rica Dome (CRD) during summer 2010 based on dilution depth profiles analyzed by flow cytometry and pigments and mesozooplankton grazing assessed by gut fluorescence. Three community production estimates, from C uptake (1025 ± 113 mg C m day) and from dilution experiments analyzed for total Chl (990 ± 106 mg C m day) and flow cytometry populations (862 ± 71 mg C m day), exceeded regional ship-based values by 2-3-fold. Picophytoplankton accounted for 56% of community biomass and 39% of production. Production profiles extended deeper for (PRO) and picoeukaryotes than for (SYN) and larger eukaryotes, but 93% of total production occurred above 40 m. Microzooplankton consumed all PRO and SYN growth and two-third of total production. Positive net growth of larger eukaryotes in the upper 40 m was balanced by independently measured consumption by mesozooplankton. Among larger eukaryotes, diatoms contributed ∼3% to production. On the basis of this analysis, the CRD region is characterized by high production and grazing turnover, comparable with or higher than estimates for the eastern equatorial Pacific. The region nonetheless displays characteristics atypical of high productivity, such as picophytoplankton dominance and suppressed diatom roles.
Identifier: FSU_pmch_27275036 (IID), 10.1093/plankt/fbv089 (DOI), PMC4889984 (PMCID), 27275036 (RID), 27275036 (EID), fbv089 (PII)
Keywords: Grazing, Plankton community, Productivity
Publication Note: This NIH-funded author manuscript originally appeared in PubMed Central at
Persistent Link to This Record:
Owner Institution: FSU
Is Part Of: Journal of plankton research.
Issue: iss. 2, vol. 38

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Landry, M. R., Selph, K. E., Décima, M., Gutiérrez-Rodríguez, A., Stukel, M. R., Taylor, A. G., & Pasulka, A. L. (2016). Phytoplankton production and grazing balances in the Costa Rica Dome. Journal Of Plankton Research. Retrieved from