Leigh Marine Laboratory, University of Auckland, P.O. Box 349, Warkworth, New Zealand.
Institute of Information and Mathematical Sciences, Massey University, Albany Campus, Private Bag 102 904, North Shore Mail Centre, Auckland, New Zealand.
Environ Pollut. 2011 Jan;159(1):116-124. doi: 10.1016/j.envpol.2010.09.012.
Elevated levels of copper and zinc in sediment have been shown to adversely affect estuarine infauna. We investigated the additivity of the combined effects of copper and zinc on infaunal recolonisation through a manipulative field experiment in Orewa estuary, New Zealand, using defaunated sediment discs treated with these metals. The nature of their combined effects varied among infaunal taxa and the particular variables being examined. Additive effects were detected for species richness, for the mean log abundances of the polychaetes Prionospio sp. and Scoloplos cylindrifer and for the multivariate response of the community as a whole. Antagonistic effects were detected for the mean log abundances of total infauna and the polychaete Heteromastus sp. Characterising the potentially interactive nature of the combined effects of multiple heavy metals is essential in order to build predictive models of future environmental impacts of metal accumulation in estuarine sediments.
沉积物中铜和锌含量的升高已被证明会对河口底栖无脊椎动物产生不利影响。我们通过在新西兰奥雷瓦河口进行的一项操纵性野外实验，研究了铜和锌联合作用对底栖无脊椎动物再定殖的加性影响，使用经过这些金属处理的去无脊椎动物沉积物圆盘。它们联合作用的性质因底栖无脊椎动物类群和所研究的特定变量而异。在物种丰富度、多毛类 Prionospio sp. 和 Scoloplos cylindrifer 的平均对数丰度以及整个群落的多变量响应方面，检测到了加性效应。在总底栖无脊椎动物和多毛类 Heteromastus sp. 的平均对数丰度方面，检测到了拮抗效应。为了建立河口沉积物中金属积累对未来环境影响的预测模型，必须描述多种重金属联合作用的潜在相互作用性质。
