Re-growth of potential invasive phytoplankton following UV-based ballast water treatment
Re-growth of potential invasive phytoplankton following UV-based ballast water treatment
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DOI：
10.3391/ai.2012.7.1.004
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发表时间：
2012-03-01
影响因子：
1.6
通讯作者：
Veldhuis, Marcel
中科院分区：
文献类型：
--
作者：
Liebich, Viola;Stehouwer, Peter Paul;Veldhuis, Marcel
压载水含有能够在船舶航行中存活下来的生物，并在排放时在接受水的水体中形成。浮游植物物种可以变得入侵，并可能是有害的，因为它们在繁殖后产生毒素或缺氧条件。存在不同的技术来处理压载水，以减少入侵物种的传播。在20多天的孵化实验中，测试了基于UV的压载水处理系统的有效性。在细胞数量最初下降之后，可以观察到某些浮游植物分类群的重新生长，即硅藻海链藻、骨架藻、角毛藻、伪菱形藻和菱形藻(顺序代表丰度等级)。本研究的结论是，许多种类的植物都能在紫外线照射下存活下来。这些可能包括有害的和潜在的入侵浮游植物物种。在测试基于紫外线的治疗系统的有效性时，应考虑长期孵化实验。再生长的优势浮游藻类群为海链藻，可作为检测UV-单位效率的指标生物。
Ballast water contains organisms which can survive the ship's journey and become established in the recipient water body when discharged. Phytoplankton species can become invasive and might be harmful by producing toxins or anoxic conditions following their blooms. Different technologies exist to treat ballast water in order to reduce the spread of invasive species. The effectiveness of a UV-based ballast water treatment system was tested in an incubation experiment over 20 days. After an initial decline in cell numbers, re-growth could be observed of certain phytoplankton taxa, namely the diatoms Thalassiosira, Skeletonema, Chaetoceros, Pseudo-nitzschia, and Nitzschia (order represents rank of abundance). The conclusion of this study is that a variety of taxa are able to survive UV-treatment. These may include harmful and potential invasive phytoplankton species. Long-term incubation experiments should be considered when testing the effectiveness of UV-based treatment systems. The dominant re-growing phytoplankton group was Thalassiosira which could be a suitable indicator organism for testing the efficiency of UV-units.