水環境学会誌
Online ISSN : 1881-3690
Print ISSN : 0916-8958
ISSN-L : 0916-8958
技術報告
生態学モデルの生態リスク分析への適用
外挿法と生活史感度解析の効用
田中 嘉成中西 準子
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ジャーナル フリー

1998 年 21 巻 9 号 p. 616-623

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Ecotoxicological data using life table evaluation are reviewed and analyzed with the power function model. Life table evaluation and population growth experiments are proposed as experimental procedures that provide demographic parameters (e.g. intrinsic rate of natural increase) relevant for calculating extinction risk due to pollutant exposure. Totally 47 concentration vs. intrinsic rate data sets were collected and analyzed with two indices in the power function model, α and β. The α-value is the concentration at which the intrinsic rate of increase drops off below zero due to exposure and the β-value represents curvature of the response. The α-values, which represent strength of ecological toxicity, are highly correlated with acute LC50s. It is indicated that the α-values are indirectly predictable from acute LC50s. Such statistical extrapolation may be useful for ecological risk assessment based on extinction probability of populations.

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© 1998 公益社団法人 日本水環境学会
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