Phenological and life-history responses of a tropical cladoceran Moina micrura to multiple environmental drivers

IF 1.8 4区环境科学与生态学 Q2 FISHERIES

Marine and Freshwater Research Pub Date : 2024-04-11 DOI:10.1071/mf23173

Muhammad Raznisyafiq Razak, Ahmad Zaharin Aris, Muhammad Rozaimi Mohd Zaki, Fatimah Md Yusoff, Zetty Norhana Balia Yusof

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引用次数: 0

Abstract

Context

Climate change and global warming has led to changes in water-quality parameters, which in turn have negative consequences for zooplankton.

Aims

To investigate the effects of various environmental stressors (pH, temperature, photoperiod, and food concentration) on the tropical freshwater microcrustacean Moina micrura.

Methods

The study examined the effects of these stressors on survival (lifespan), reproduction (days to first brood, number of broods, and total offspring), growth (individual size and total moulting), physiology (heart rate), and sex-switching effects (total male offspring).

Key results

Significant (P < 0.05) reductions in the total offspring, individual size, and heart rate of M. micrura were observed when exposed to acidic (pH 5) and alkaline (pH 9) conditions. Conversely, higher water temperatures (31°C) and longer light exposure (20 h) were found to increase total offspring and heart rate in M. micrura. Furthermore, male offspring were produced only under conditions of food scarcity (no food supply and 1 × 10² cells mL⁻¹).

Conclusions

Climate change has a significant effect on the life-history traits of M. micrura, a tropical cladoceran species.

Implications

Vital insights that can guide policymakers and practitioners in developing more effective strategies to safeguard and preserve tropical freshwater aquatic habitats, especially those of zooplankton species.

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热带栉水母Moina micrura对多种环境因素的物候学和生活史反应

背景气候变化和全球变暖导致水质参数发生变化，进而对浮游动物产生负面影响。目的研究各种环境胁迫因素（pH值、温度、光周期和食物浓度）对热带淡水微型甲壳类动物Moina micrura的影响。方法该研究考察了这些胁迫因素对生存（寿命）、繁殖（首次产仔天数、产仔数和后代总数）、生长（个体大小和蜕皮总数）、生理（心率）和性别转换效应（雄性后代总数）的影响。主要结果当暴露于酸性（pH 值为 5）和碱性（pH 值为 9）条件下时，观察到微型栉水母的后代总数、个体大小和心率显著降低（P < 0.05）。相反，较高的水温（31°C）和较长的光照时间（20 小时）可增加小龙鱼的后代总数和心率。此外，只有在食物稀缺（无食物供应和 1 × 102 cells mL-1）的条件下才会产生雄性后代。结论气候变化对热带栉水母的生活史特征有显著影响。意义重要的见解可指导政策制定者和实践者制定更有效的策略，以保护和保存热带淡水水生生境，尤其是浮游动物物种的生境。

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

Marine and Freshwater Research 环境科学-海洋学

CiteScore

4.60

自引率

5.60%

发文量

审稿时长

3.8 months

期刊介绍： Marine and Freshwater Research is an international and interdisciplinary journal publishing contributions on all aquatic environments. The journal’s content addresses broad conceptual questions and investigations about the ecology and management of aquatic environments. Environments range from groundwaters, wetlands and streams to estuaries, rocky shores, reefs and the open ocean. Subject areas include, but are not limited to: aquatic ecosystem processes, such as nutrient cycling; biology; ecology; biogeochemistry; biogeography and phylogeography; hydrology; limnology; oceanography; toxicology; conservation and management; and ecosystem services. Contributions that are interdisciplinary and of wide interest and consider the social-ecological and institutional issues associated with managing marine and freshwater ecosystems are welcomed. Marine and Freshwater Research is a valuable resource for researchers in industry and academia, resource managers, environmental consultants, students and amateurs who are interested in any aspect of the aquatic sciences. Marine and Freshwater Research is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.