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首页> 外文期刊>Phycological Research >Eukaryotic picophytoplankton community response to copper enrichment in a metal-perturbed coastal environment
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Eukaryotic picophytoplankton community response to copper enrichment in a metal-perturbed coastal environment

机译：在金属扰动的沿海环境中，真核浮游植物群落对铜富集的反应

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摘要

Copper is an essential micronutrient, especially for photosynthetic organisms, but can be toxic at high concentrations. In the past years, coastal waters have been exposed to an increase in copper concentration due to anthropogenic inputs. One well known case is the Chanaral area (Easter South Pacific coast), where a long term coastal copper enrichment event has occurred. That event strongly affected benthic marine diversity, including microbial communities. In this work, microcosm experiments were carried out to address the changes on picophytoplankton community composition of the disturbed area, when challenged to copper additions. Eukaryotic picophytoplankton communities from two areas were analyzed: one in the most copper-perturbed area and another at the north edge of the perturbed area. Flow cytometry data showed that 25g L-1 of copper addition exerted a positive effect in the growth kinetics on part of the eukaryotic picophytoplankton communities, independently of the site. 16S-plastid terminal restriction fragment length polymorphisms analysis suggested that eukaryotic picophytoplankton display a short and directional response to high copper levels. Members of the Prasinophyceae class, a Coscinodiscophyceae diatom, as well as Phaeocystis, respond in a short time to the environmental disturbance, making them excellent candidates for further studies to evaluate phytoplanktonic species as sentinels for copper disturbances in coastal marine ecosystems.
机译：铜是必需的微量营养素，特别是对于光合生物而言，但在高浓度下可能有毒。在过去的几年中，由于人为投入，沿海水域的铜浓度增加。一个著名的案例是Chanaral地区（东太平洋南部海岸），在那里发生了长期的沿海铜富集事件。该事件严重影响了底栖海洋多样性，包括微生物群落。在这项工作中，进行了微观实验，以解决当受到铜添加的挑战时，受干扰地区的浮游植物浮游生物群落组成的变化。分析了两个地区的真核浮游植物群落：一个在铜污染最严重的地区，另一个在铜污染最严重的地区。流式细胞仪数据表明，添加25g L-1的铜对部分真核浮游植物浮游生物群落的生长动力学有积极影响，而与部位无关。 16S质体终端限制片段长度多态性分析表明，真核微浮游生物对高铜水平显示出短而定向的响应。藻类藻科藻类，藻藻科藻科以及藻囊藻在短时间内对环境扰动做出反应，使其成为进一步研究评估浮游植物物种作为沿海海洋生态系统铜质扰动定点的极佳候选人。

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