Simulation modeling of phytoplankton dynamics in a large eutrophic river, Hungary – Danubian Phytoplankton Growth Model (DPGM)

Sipkay, Csaba, Kiss-Keve, Tihamér, Vadadi Fülöp, Cs., Homoródi, Réka and Hufnagel, Levente (2012) Simulation modeling of phytoplankton dynamics in a large eutrophic river, Hungary – Danubian Phytoplankton Growth Model (DPGM). Biologia, 67 (2). pp. 323-337. DOI 10.2478/s11756-012-0004-2

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Ecological models have often been used in order to answer questions that are in the limelight of recent researches such as the possible effects of climate change. The methodology of tactical models is a very useful tool comparison to those complex models requiring relatively large set of input parameters. In this study, a theoretical strategic model (TEGM ) was adapted to the field data on the basis of a 24-year long monitoring database of phytoplankton in the Danube River at the station of G¨od, Hungary (at 1669 river kilometer – hereafter referred to as “rkm”). The Danubian Phytoplankton Growth Model (DPGM) is able to describe the seasonal dynamics of phytoplankton biomass (mg L−1) based on daily temperature, but takes the availability of light into consideration as well. In order to improve fitting, the 24-year long database was split in two parts in accordance with environmental sustainability. The period of 1979–1990 has a higher level of nutrient excess compared with that of the 1991–2002. The authors assume that, in the above-mentioned periods, phytoplankton responded to temperature in two different ways, thus two submodels were developed, DPGM-sA and DPGMsB. Observed and simulated data correlated quite well. Findings suggest that linear temperature rise brings drastic change to phytoplankton only in case of high nutrient load and it is mostly realized through the increase of yearly total biomass.

Item Type:Article
Uncontrolled Keywords:climate change; ecological model; nutrient load; tactical modeling
Divisions:Faculty of Horticultural Science > Department of Mathematics and Informatics
Funders:Ányos Jedlik Programme, Adaptation to Climate Change Research Group, “Bolyai János” Research Fellowship (
Projects:OTKA TS 049875 , VAHAVA project, KLIMA-KKT project, TÁMOP project 4.2.1/B-09/1/KMR/-2010–0005
ID Code:1594
Deposited By: Z. S.
Deposited On:16 Jul 2014 12:10
Last Modified:16 Jul 2014 12:10

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