Bervoets Lieven, Knaepkens Guy, Eens Marcel, Blust Ronny
Department of Biology, Ecophysiology, Biochemistry and Toxicology Group, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
Environ Pollut. 2005 Nov;138(2):338-49. doi: 10.1016/j.envpol.2005.03.005.
The effect of metal pollution on fish communities was assessed at 47 sites, including a Cd and Zn gradient. Fish community structure was assessed by applying diversity indices, index of biotic integrity and the abundance/biomass comparison method (ABC-index). To relate the community responses to metal pollution, toxic unit values for dissolved metals (TU(w)) and for metals in fish liver (TU(t)) were calculated. If all sites were considered only a good relationship was found between the IBI and the TU(w), with 56% of the variation in IBI being described. Within the pollution gradient (sites 1--12) the described variation increased up to 85%. Relating the community structure to TU(t), the described variation in IBI further increased to 87%. Our results indicate that besides water quality other factors influenced diversity and ABC-index. The IBI proved a suitable index for the assessment of metal pollution, provided that other water quality characteristics meet the water quality criteria.
在包括镉和锌梯度在内的47个地点评估了金属污染对鱼类群落的影响。通过应用多样性指数、生物完整性指数和丰度/生物量比较方法（ABC指数）来评估鱼类群落结构。为了将群落反应与金属污染联系起来，计算了溶解金属的毒性单位值（TU(w)）和鱼肝中金属的毒性单位值（TU(t)）。如果仅考虑所有地点，在生物完整性指数和TU(w)之间仅发现良好的关系，生物完整性指数的56%的变化得到描述。在污染梯度内（1至12号地点），所描述的变化增加到85%。将群落结构与TU(t)联系起来，生物完整性指数中所描述的变化进一步增加到87%。我们的结果表明，除水质外，其他因素也影响多样性和ABC指数。只要其他水质特征符合水质标准，生物完整性指数被证明是评估金属污染的合适指数。
