Colony Formation in Three Species of the Family Scenedesmaceae (Desmodesmus subspicatus, Scenedesmus Acutus, Tetradesmus Dimorphus) Exposed to Sodium Dodecyl Sulfate and its Interference with Grazing of DAPHNIA Galeata
Colony Formation in Three Species of the Family Scenedesmaceae (Desmodesmus subspicatus, Scenedesmus Acutus, Tetradesmus Dimorphus) Exposed to Sodium Dodecyl Sulfate and its Interference with Grazing of DAPHNIA Galeata
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DOI：
10.1007/s00244-021-00890-8
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发表时间：
2021-03
影响因子：
4
通讯作者：
Yusuke Oda;Masaki Sakamoto;Y. Miyabara
中科院分区：
文献类型：
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作者：
Yusuke Oda;Masaki Sakamoto;Y. Miyabara
通过模拟食草动物释放的信息化学物质，常见的阴离子表面活性剂十二烷基硫酸钠（SDS）可以在环境相关浓度下诱导绿色藻属Scenedesmus的菌落形成。形态效应会阻碍食草动物的摄食效率，减少沿着浮游食物链从场景到消费者的能量流。尽管存在这种潜在的生态风险，但很少有研究表明SDS引发的菌落诱导在Scenedesmaceae的其他物种中是否常见。本文研究了SDS对三种栅藻（Desmodesmus subspicatus，Scenedesmus acutus，Tetradesmus dimorphus）生长和形态的影响，以及对水蚤（Daphnia galeatagration）在SDS诱导的菌落上的清除率的影响。SDS在非致死浓度（0.1-10 mg L−1）下72小时内触发所有藻类的菌落形成;然而，菌落形成的诱导水平通常低于Daphniflora培养基中的水平。我们还发现SDS诱导的群体藻降低了D。清除率。我们的研究结果突出了SDS对水蚤-Scenedesmaceaesspectrometry的潜在影响，通过触发Scenedesmaceaeat浓度低于产生毒性的浓度的形态反应。应在生态风险评估的框架内考虑污染物对捕食者-被捕食者相互作用的这种破坏性影响。
By mimicking the info-chemicals emitted by grazers, the common anionic surfactant sodium dodecyl sulfate (SDS) can induce colony formation in the green algal genusScenedesmusat environmentally relevant concentrations. The morphometric effects can hinder the feeding efficiency of grazers, reducing energy flow along the pelagic food chain fromScenedesmusto consumers. Despite this potential ecological risk, few studies exist on whether the SDS-triggered induction of colonies is common in other species of the familyScenedesmaceae. Here, we investigated the effects of SDS on the growth and morphology of three species ofScenedesmaceae(Desmodesmus subspicatus,Scenedesmus acutus, andTetradesmus dimorphus) and on the clearance rates ofDaphnia galeatagrazing on the SDS-induced colonies. SDS triggered colony formation in all algal species at concentrations nonlethal to them (0.1–10 mg L−1) in 72 h; however, the induction levels of colony formation were generally lower than for those in theDaphniaculture medium. We also found that the SDS-induced colonial algae reducedD. galeataclearance rates. Our results highlight the potential effect of SDS on theDaphnia–Scenedesmaceaesystem by triggering the morphological response ofScenedesmaceaeat concentrations below those that exert toxicity. Such disruptive effects of pollutants on predator–prey interactions should be considered within the framework of ecological risk assessments.