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Vertical Mixing and Ecological Effects of Ultraviolet Radiation in Planktonic Communities
Author(s) -
Ferrero Emma,
Eöry Matías,
Ferreyra Gustavo,
Schloss Irene,
Zagarese Horacio,
Vernet Maria,
Momo Fernando
Publication year - 2006
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1562/2005-11-23-ra-736
Subject(s) - plankton , phytoplankton , photosynthetically active radiation , mixing (physics) , irradiance , zooplankton , environmental science , water column , radiation , photoinhibition , atmospheric sciences , oceanography , ultraviolet radiation , biomass (ecology) , ecology , physics , biology , chemistry , optics , nutrient , photosynthesis , geology , photosystem ii , botany , quantum mechanics , radiochemistry
We present a mathematical model for a phytoplankton‐zooplankton system, based on a predator‐prey scheme. The model considers the effects of sinking in the phytoplankton, vertical mixing and attenuation of photosynthetically active radiation (PAR) and ultraviolet radiation (UVR) in the water column. In a first approach, the model was studied under conditions of average PAR irradiance and shows fluctuations and stable equilibrium points. Secondly, we introduced the effects of photoperiod and photoinhibition by UVR and vertical mixing. Under these conditions, the phytoplankton biomass oscillates depending on the combined effects of UVR and mixing. Higher inhibition by UVR and longer mixing periods can induce strong fluctuations in the system but can also produce higher plankton peaks.