Combined toxic effects of yessotoxin and polystyrene on the survival, reproduction, and population growth of rotifer Brachionus plicatilis at different temperatures.

IF 2.4 4区环境科学与生态学 Q2 ECOLOGY

Ecotoxicology Pub Date : 2024-10-24 DOI:10.1007/s10646-024-02819-y

Ye Liang, Jun Yang, Zongyan Zhang, Yujing Xiao, Haifeng Gu

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引用次数: 0

Abstract

Yessotoxin (YTX) is a disulfated toxin produced by harmful dinoflagellates and causes risks to aquatic animals. Polystyrene (PS) microplastics could absorb toxins in seawaters but pose threats to organism growth. In this study, the combined toxic effects of YTX (0, 20, 50, and 100 µg L^-1) and PS (0, 5, and 10 µg mL^-1) on the survival, reproduction, and population growth of marine rotifer Brachionus plicatilis at 20 °C, 25 °C, and 30 °C were evaluated. Results indicated that the survival time (S), time to first batch of eggs (F_t), total offspring per rotifer (O_t), generational time (T₀), net reproduction rate (R₀), intrinsic growth rate (r_m), and population growth rate (r) of rotifers were inhibited by YTX and PS at 25 °C and 30 °C. Low temperature (20 °C) improved the life-table parameters T₀, R₀, and r_m at YTX concentrations less than 100 µg L^-1. Temperature, YTX, and PS had interactive effects on rotifers' S, F_t, O_t, T₀, R₀, r_m, and r. The combined negative effects of YTX and PS on rotifers' survival, reproduction, and population growth were significantly enhanced at 30 °C. These findings emphasized the importance of environmental temperature in studying the interactive effects of microplastics and toxins on the population growth of zooplankton in eutrophic seawaters.

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叶索毒素和聚苯乙烯在不同温度下对轮虫Brachionus plicatilis的存活、繁殖和种群增长的联合毒性效应。

叶索毒素（YTX）是一种由有害甲藻产生的二硫化毒素，对水生动物造成危害。聚苯乙烯（PS）微塑料可以吸收海水中的毒素，但会对生物的生长造成威胁。本研究评估了 YTX（0、20、50 和 100 µg L-1）和 PS（0、5 和 10 µg mL-1）在 20 °C、25 °C和 30 °C下对海洋轮虫 Brachionus plicatilis 的存活、繁殖和种群增长的综合毒性效应。结果表明，在 25 °C和 30 °C下，YTX 和 PS 会抑制轮虫的存活时间（S）、第一批卵时间（Ft）、每只轮虫的后代总数（Ot）、世代时间（T0）、净繁殖率（R0）、内在增长率（rm）和种群增长率（r）。当 YTX 浓度低于 100 µg L-1 时，低温（20 °C）可改善生命表参数 T0、R0 和 rm。温度、YTX 和 PS 对轮虫的 S、Ft、Ot、T0、R0、rm 和 r 有交互影响。YTX 和 PS 对轮虫存活、繁殖和种群增长的综合负面影响在 30 °C 时显著增强。这些发现强调了环境温度在研究微塑料和毒素对富营养化海水中浮游动物种群增长的交互影响中的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ecotoxicology 环境科学-毒理学

CiteScore

5.30

自引率

3.70%

发文量

107

审稿时长

4.7 months

期刊介绍： Ecotoxicology is an international journal devoted to the publication of fundamental research on the effects of toxic chemicals on populations, communities and terrestrial, freshwater and marine ecosystems. It aims to elucidate mechanisms and processes whereby chemicals exert their effects on ecosystems and the impact caused at the population or community level. The journal is not biased with respect to taxon or biome, and papers that indicate possible new approaches to regulation and control of toxic chemicals and those aiding in formulating ways of conserving threatened species are particularly welcome. Studies on individuals should demonstrate linkage to population effects in clear and quantitative ways. Laboratory studies must show a clear linkage to specific field situations. The journal includes not only original research papers but technical notes and review articles, both invited and submitted. A strong, broadly based editorial board ensures as wide an international coverage as possible.