Phytoplankton biovolume is independent from the slope of the size spectrum in the oligotrophic atlantic ocean

Enrique Moreno-Ostos, José María Blanco, Susana Agusti, Luis M. Lubián, Valeriano Rodríguez, Roberto L. Palomino, Moira Llabrés, Jaime Rodríguez

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Modelling the size-abundance spectrum of phytoplankton has proven to be a very useful tool for the analysis of physical-biological coupling and the vertical flux of carbon in oceanic ecosystems at different scales. A frequent observation relates high phytoplankton biovolume in productive regions with flatter spectrum slope and the opposite in oligotrophic ecosystems. Rather than this, the relationship between high biovolume phytoplankton assemblages and flatter size-abundance spectra does not correspond with measurements of the phytoplankton community in the Atlantic Ocean open waters. As part of the Malaspina Circunnavegation Expedition, sixty seven sampling stations within the Atlantic Ocean covering six oceanographic provinces, at different seasons, produced a complete set of phytoplankton size-spectra whose slope and biovolume did not show any obvious interrelation. In these oligotrophic sites, small (procaryotes) and medium-size (nanoplankton) cells are responsible for the most part of biovolume, and their response to environmental conditions does not apply to changes in the size-abundance spectrum slope as expected in richer, large-cell dominated ecosystems.
Original languageEnglish (US)
Pages (from-to)42-50
Number of pages9
JournalJournal of Marine Systems
Volume152
DOIs
StatePublished - Aug 7 2015

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Oceanography
  • Aquatic Science

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