Evaluating the impact of residual low chlorine concentration on phytoplankton communities by flow cytometry

IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Chemosphere Pub Date : 2024-11-01 DOI:10.1016/j.chemosphere.2024.143634
Marta Vannoni , Alastair Grant , Dave Sheahan , Véronique Créach
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Abstract

Chlorination is widely used to prevent biological fouling in power station cooling water systems. It may impact non-target organisms both within the cooling system and after discharge (primary and secondary entrainment). However, there is a lack of data on the impacts of the low chlorine concentrations that occur in the discharged plume on marine phytoplankton community structure and function.
We examine the impacts on natural phytoplankton communities of single and multiple exposures to chlorination at concentrations between 0.02 and 0.1 mg/L total residual oxidants (TRO). Low-level chlorination causes limited changes in diversity and has no impact on total biomass. However, changes in size structure and functional diversity quantified using flow cytometry do show a reduction in smaller cells, particularly eukaryote picophytoplankton.
These impacts are not detectable using chlorophyll a concentration alone, so flow cytometry provides important additional information over more standard ecotoxicological methods.
The effects are likely to be localised in the vicinity of the discharges (mixing zone) where the environmental quality standard (EQS) of 10 μg/L for chlorine is exceeded, but impacts on coastal food webs and biogeochemical cycles should be further evaluated.

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通过流式细胞仪评估低浓度余氯对浮游植物群落的影响。
氯化被广泛用于防止电站冷却水系统中的生物污垢。它可能会对冷却系统内和排放后(一次和二次夹带)的非目标生物产生影响。然而,关于排放羽流中低浓度氯对海洋浮游植物群落结构和功能的影响,目前还缺乏相关数据。我们研究了单次和多次暴露于 0.02 至 0.1 毫克/升总残留氧化剂 (TRO) 浓度的氯化对自然浮游植物群落的影响。低浓度氯化对多样性的影响有限,对总生物量也没有影响。不过,使用流式细胞仪量化的大小结构和功能多样性的变化确实显示出较小细胞的减少,尤其是真核浮游微藻。仅使用叶绿素 a 浓度无法检测到这些影响,因此流式细胞仪提供了比标准生态毒理学方法更重要的额外信息。这些影响很可能局限在排放口附近(混合区),那里的氯含量超过了 10 μg/L 的环境质量标准 (EQS),但对沿岸食物网和生物地球化学循环的影响还需进一步评估。
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来源期刊
Chemosphere
Chemosphere 环境科学-环境科学
CiteScore
15.80
自引率
8.00%
发文量
4975
审稿时长
3.4 months
期刊介绍: Chemosphere, being an international multidisciplinary journal, is dedicated to publishing original communications and review articles on chemicals in the environment. The scope covers a wide range of topics, including the identification, quantification, behavior, fate, toxicology, treatment, and remediation of chemicals in the bio-, hydro-, litho-, and atmosphere, ensuring the broad dissemination of research in this field.
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