Dynamics of Two Picophytoplankton Groups inMediterranean Sea: Analysis of the Deep Chlorophyll Maximum by a Stochastic Advection-Reaction-Diffusion Model

Giovanni Denaro, Davide Valenti, Bernardo Spagnolo, Salem W. Zgozi, Salvatore Aronica, Gualtiero Basilone, Salvatore Mazzola, Angelo Bonanno

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

A stochastic advection-reaction-diffusion model with terms of multiplicative white Gaussian noise, valid for weakly mixed waters, is studied to obtain the vertical stationary spatial distributions of two groups of picophytoplankton, i.e.,picoeukaryotes and Prochlorococcus, which account about for 60% of total chlorophyll on average in Mediterranean Sea. By numerically solving the equations of the model, we analyze the one-dimensional spatio-temporal dynamics of the total picophytoplankton biomass and nutrient concentration along the water column at different depths. In particular, we integrate the equations over a time interval long enough, obtaining the steady spatial distributions for the cell concentrations of the two picophytoplankton groups. The results are converted into chlorophyll a and divinil chlorophyll a concentrations and compared with experimental data collected in two different sites of the Sicily Channel (southern Mediterranean Sea). The comparison shows that real distributions are well reproduced by theoretical profiles. Specifically,position, shape and magnitude of the theoretical deep chlorophyll maximum exhibit a good agreement with theexperimental values.
Original languageEnglish
Pages (from-to)e66765(1)-e66765(14)
Number of pages14
JournalPLoS One
Volume8
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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