Assessment of Lake Orta sediments phytotoxicity after the liming treatment
Assessment of Lake Orta sediments phytotoxicity after the liming treatment
复制标题
奥尔塔湖沉积物石灰处理后植物毒性的评估
DOI：
10.4081/jlimnol.2001.1.269
复制
发表时间：
2001
影响因子：
1.6
通讯作者：
D. Rossi
中科院分区：
文献类型：
--
作者：
P. Barbero;M. Beltrami;R. Baudo;D. Rossi
本文介绍了从种子发芽和根伸长测试奥尔塔湖沉积物污染的评价结果。该试验的方案是在文献调查和仔细研究获得几种植物的市售种子发芽的适当条件后制定的。最后选择黄瓜、莴苣和独行菜作为研究对象，对奥尔塔湖沉积物的液相和固相进行了植物毒性检测。为了评估水-沉积物界面的交换是否会对环境造成危害，以及沉积物中有毒物质的实际生物利用度，对1992、1994、1996、1997和1998年从选定站点收集的样本进行了植物毒性测试，测试对象是三种不同植物物种（莴苣、独行菜和黄瓜）的种子。所获得的结果允许绘制发芽指数的分布图，这证实了毒性作用的持久性。然而，该湖似乎对恢复处理有积极的反应，因为污染较重的沉积物层目前被埋在毒性较低的沉积物之下。
The paper presents results from seed germination and root elongation tests for the evaluation of Lake Orta sediment contamination. The protocol for this test was developed after a literature survey and careful investigation of the proper conditions for obtaining the germination of commercially available seeds of several plants. Cucumis sativus, Lactuca sativa, and Lepidium sativum were finally chosen and used to detect the phytotoxicity of both liquid and solid phases of Lake Orta sediments. To assess whether exchange at the water – sediment interface could represent a hazard for the environment and the actual bioavailability of the toxicants present into the sediments, the phytotoxicity of samples collected in 1992, 1994, 1996, 1997, and 1998 from selected stations was tested on seeds of three different plant species (Lactuca sativa, Lepidium sativum and Cucumis sativus). The obtained results allow drawing distribution maps of the germination index, which confirm the persistence of toxic effects. However, the lake seems to positively respond to the restoration treatment, since the more contaminated layers of sediments are presently buried under less toxic sediments.