A bioenergetic biomagnification model for the animal kingdom
A bioenergetic biomagnification model for the animal kingdom
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DOI：
10.1021/es051800i
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发表时间：
2006-03-01
影响因子：
11.4
通讯作者：
Gobas, FAPC
中科院分区：
文献类型：
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作者：
Debruyn, AMH;Gobas, FAPC
不同物种在积累饮食污染物的程度上存在很大差异。生物能量过程在化学物质的吸收和消除中起着关键作用，生物积累的种间差异在很大程度上可以归因于物种如何摄食、消化和分配能量的差异。我们提出了对整个动物界这种关系的量化处理。我们推导了一个模型来预测非代谢的、缓慢消除的化学物质的生物放大因子BMFmax。我们用观察到的生物放大因子和独立得出的生物能量参数测试了一系列物种，包括食草动物和食肉动物、异温动物和恒温动物、脊椎动物和无脊椎动物、成体和幼体、家养/实验室动物和来自淡水、海洋和陆地环境的野生个体。该模型成功地预测了这一范围内物种特有的BMFmax值，从毛毛虫的不到1到一些食肉动物的近100。此外，我们对几个没有可测量的生物积累数据的分类群进行了新的BMFmax预测。我们的分析为生态学在整个动物界的化学动力学中的作用提供了新的见解，为理解有机体的特征及其生态环境如何影响该有机体积累其饮食中存在的化学物质的程度提供了一个一般框架。
Species vary greatly in the degree to which they accumulate dietary contaminants. Bioenergetic processes play a key role in chemical uptake and elimination, and interspecific variation in bioaccumulation can be attributed in large part to variation in how species feed, digest, and allocate energy. We present a quantitative treatment of this relationship for the entire animal kingdom. We derive a model to predict the biomagnification factor for nonmetabolizable, slowly eliminated chemicals, BMFmax. We test the model with observed biomagnification factors and independently derived bioenergetic parameters for a diverse suite of species, including herbivores and carnivores, heterotherms and homeotherms, vertebrates and invertebrates, adults and juveniles, domestic/laboratory animals and wild individuals from freshwater, marine, and terrestrial environments. The model successfully predicts species-specific BMFmax values across this range of taxa, with values ranging from less than 1 in caterpillars to nearly 100 in some carnivores. In addition, we make novel predictions of BMFmax for several taxa for which no measured bioaccumulation data are available. Our analysis provides new insights into the role of ecology in chemical dynamics across the animal kingdom, providing a general framework for understanding how characteristics of an organism and its ecological context influence the degree to which that organism accumulates chemicals present in its diet.