Williamson Phillip
Department of Zoology, University of Durham, DH1 3LE, Durham, UK.
Oecologia. 1979 Dec;44(1):75-79. doi: 10.1007/BF00346401.
Concentration Factors (ppm in animal: ppm in diet) are presented for lead, zinc and cadmium in the snail Cepaea hortensis, and for lead and zinc in the woodlice Oniscus asellus and Philoscia muscorum, sampled at roadside sites. For each species such factors were found to be extremely variable, affected not only by season, and size and/or age of animals, but also by the choice of data used in estimating metal levels in the diet. It is concluded that factors other than seasonal changes in metal levels of senescent vegetation are primarily responsible for withinsite variation in the lead, zinc and cadmium concentrations of invertebrate detritivores.
给出了路边采集的蜗牛（Cepaea hortensis）体内铅、锌和镉的富集系数（动物体内的ppm：食物中的ppm），以及鼠妇（Oniscus asellus）和潮虫（Philoscia muscorum）体内铅和锌的富集系数。对于每个物种，发现这些系数变化极大，不仅受季节、动物大小和/或年龄的影响，还受用于估算食物中金属含量的数据选择的影响。得出的结论是，除了衰老植被中金属含量的季节性变化外，其他因素是导致无脊椎碎屑食性动物体内铅、锌和镉浓度在不同地点变化的主要原因。
