PICOPHYTOPLANKTON DYNAMICS IN NOISY MARINE ENVIRONMENT

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

Risultato della ricerca: Articlepeer review

28 Citazioni (Scopus)

Abstract

We present a stochastic reaction-diffusion-taxis model to describe the picophytoplankton dynamics along a water column. The model, which is valid for poorly mixed waters, typical of the Mediterranean Sea, considersintraspecific competition of picophytoplankton for light and nutrients. Random fluctuations of environmental variables are taken into account by adding a source of multiplicative noise to the diffusion equation for the picophytoplanktonbiomass concentration, whose distribution along the water column shows a maximum at a certain depth. After converting our resultsinto chlorophyll a concentrations, we compare theoretical distributions, obtained for different noise intensities, with the experimental chlorophyll a distribution sampled in a site of the Strait of Sicily. Specifically, we find that position and height of the chlorophyll a peak concentration obtained from the model are in a very good agreement with field observations. Finally, we consider the effects of seasonal variations on phytoplankton dynamics by adding an oscillating term in the equation for the light intensity.
Lingua originaleEnglish
pagine (da-a)1227-1240
Numero di pagine14
RivistaActa Physica Polonica B
Volume43
Stato di pubblicazionePublished - 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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