Sawidis T, Brown M T, Zachariadis G, Sratis I
Department of Botany, University of Thessaloniki, Greece.
Environ Int. 2001 Jul;27(1):43-7. doi: 10.1016/s0160-4120(01)00052-6.
The commonest species of red, brown, and green macroalgae were sampled from a range of biotopes in the Aegean Sea and analysed for five different trace metals. Significant differences in metal concentrations were found among different seaweed species from the same biotope. The concentrations of metals in the various seaweed species may reflect their morphology, with those having a larger surface area having a greater internal content. Different species of seaweed have different affinities for different heavy metals. This may reflect competition between metals for binding or uptake sites in the seaweed. Comparing metal concentrations in algae among the studied sampling stations clearly indicates that the degree of accumulation depends not only on human activities but also on the geology of the specific area. While seaweed can be used successfully to assess the levels of heavy metals in the marine environment, not all elevated concentrations of heavy metals necessarily reflect increased levels of pollution. Indeed, the high concentrations of certain metals, e.g., Ni, found in our seaweed samples reflected the metaliferrous nature of the rock. It is therefore important to take account of a region's geology before attempting to interpret the data.
从爱琴海一系列生物群落中采集了最常见的红藻、褐藻和绿藻物种样本，并对其中五种不同的痕量金属进行了分析。在来自同一生物群落的不同海藻物种之间发现了金属浓度的显著差异。各种海藻物种中的金属浓度可能反映了它们的形态，表面积较大的海藻内部含量更高。不同种类的海藻对不同重金属具有不同的亲和力。这可能反映了金属之间在海藻中争夺结合或吸收位点的竞争。比较研究采样站藻类中的金属浓度清楚地表明，积累程度不仅取决于人类活动，还取决于特定区域的地质情况。虽然海藻可以成功用于评估海洋环境中的重金属水平，但并非所有重金属浓度升高都必然反映污染水平的增加。事实上，我们海藻样本中发现的某些金属（如镍）的高浓度反映了岩石的含金属性质。因此，在试图解释数据之前考虑一个地区的地质情况很重要。
