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Model ecosystem approach to estimate community level effects of radiation

Published online by Cambridge University Press:  17 June 2005

J.C. Barescut ,
J.C. Gariel ,
J.M. Péres ,
M. Doi ,
I. Kawaguchi ,
N. Tanaka ,
S. Fuma ,
N. Ishii ,
K. Miyamoto  and
H. Takeda
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M. Doi
Affiliation:
Center for Radiation Safety, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage Chiba 263-8555, Japan
I. Kawaguchi
Affiliation:
Center for Radiation Safety, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage Chiba 263-8555, Japan
N. Tanaka
Affiliation:
Center for Radiation Safety, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage Chiba 263-8555, Japan
S. Fuma
Affiliation:
Center for Radiation Safety, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage Chiba 263-8555, Japan
N. Ishii
Affiliation:
Center for Radiation Safety, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage Chiba 263-8555, Japan
K. Miyamoto
Affiliation:
Center for Radiation Safety, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage Chiba 263-8555, Japan
H. Takeda
Affiliation:
Center for Radiation Safety, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage Chiba 263-8555, Japan
Z. Kawabata
Affiliation:
Center for Ecological Research, Kyoto University, Hirano-cho, Otsu, Shiga, Japan
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Abstract

Mathematical computer model is developed to simulate the population dynamics and dynamic mass budgets of the microbial community realized as a self sustainable aquatic ecological system in the tube. Autotroph algae, heterotroph protozoa and saprotroph bacteria live symbiotically with interspecies' interactions as predator-prey relationship, competition for the common resource, autolysis of detritus and detritus-grazing food chain, etc. The simulation model is the individual-based parallel model, built in the demographic stochasticity, environmental stochasticity by dividing the aquatic environment into patches. Validity of the model is checked by the multifaceted data of the microcosm experiments. In the analysis, intrinsic parameters of umbrella endpoint regarding to lethality are manipulated at the individual level, and tried to find the population level, community level especially focused on predator-prey relationship, and revealed the indirect effect of chronic exposure of radiation on the probability of Tetrahymena's extinction.

Type
Research Article
Information
Radioprotection , Volume 40 , Issue S1 , May 2005 , pp. S913 - S919
Copyright
© EDP Sciences, 2005

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