School of Biology, College of Science, Center of Excellence in Phylogeny of Living Organisms, University of Tehran, Tehran, Iran.
Bull Environ Contam Toxicol. 2013 Apr;90(4):456-9. doi: 10.1007/s00128-012-0941-z. Epub 2013 Jan 3.
The objective of this study was to assess the capability of earthworms from the same ecological group as heavy metal bioindicators. Three earthworm species from the endogeic group were studied: Aporrectodea caliginosa (Savigny, 1826), Perelia kaznakovi (Michaelsen, 1910) and Octolasion lacteum (Örley, 1885). Their accumulation of the heavy metals lead (Pb) and cadmium (Cd) were studied from three stations in Tehran province, Iran. O. lacteum was used to compare metal accumulations in two sites located next to a highway. A. caliginosa and P. kaznakovi were used at a third site located near the edge of a sewage system to compare metal accumulations between the two endogeic species in this area. At both locations, the concentrations of Cd and Pb in earthworms were higher than in the surrounding soil. The results of the study revealed that P. kaznakovi and A. caliginosa were better bioindicators for Pb, but O. lacteum was a better bioindicator for Cd. These earthworms can therefore be used as Cd and Pb bioindicators in environmental assessment.
本研究旨在评估与重金属生物标志物同生态群的蚯蚓的能力。研究了三种内栖组的蚯蚓物种：暗色异唇蚓（Aporrectodea caliginosa）（Savigny，1826）、克拉兹纳科夫异唇蚓（Perelia kaznakovi）（Michaelsen，1910）和巴氏真蚓（Octolasion lacteum）（Örley，1885）。它们对来自伊朗德黑兰省三个地点的重金属铅（Pb）和镉（Cd）的积累进行了研究。巴氏真蚓用于比较位于高速公路旁的两个地点的金属积累。A. caliginosa 和 P. kaznakovi 用于第三个位于污水处理系统边缘的地点，以比较该地区两种内栖物种之间的金属积累。在这两个地点，蚯蚓体内的 Cd 和 Pb 浓度均高于周围土壤。研究结果表明，P. kaznakovi 和 A. caliginosa 是 Pb 的更好生物标志物，但 O. lacteum 是 Cd 的更好生物标志物。因此，这些蚯蚓可以用作环境评估中的 Cd 和 Pb 生物标志物。
