Suppr超能文献

桡足类的繁殖努力和氧化状态对海洋环境变暖的响应

Copepod reproductive effort and oxidative status as responses to warming in the marine environment.

作者信息

von Weissenberg Ella, Jansson Anna, Vuori Kristiina A, Engström-Öst Jonna

机构信息

Tvärminne Zoological Station University of Helsinki Hangö Finland.

Novia University of Applied Sciences Ekenäs Finland.

出版信息

Ecol Evol. 2022 Feb 18;12(2):e8594. doi: 10.1002/ece3.8594. eCollection 2022 Feb.

Abstract

The marine ecosystems are under severe climate change-induced stress globally. The Baltic Sea is especially vulnerable to ongoing changes, such as warming. The aim of this study was to measure eco-physiological responses of a key copepod species to elevated temperature in an experiment, and by collecting field samples in the western Gulf of Finland. The potential trade-off between reproductive output and oxidative balance in copepods during thermal stress was studied by incubating female sp. for reproduction rate and oxidative stress measurements in ambient and elevated temperatures. Our field observations show that the glutathione cycle had a clear response in increasing stress and possibly had an important role in preventing oxidative damage: Lipid peroxidation and ratio of reduced and oxidized glutathione were negatively correlated throughout the study. Moreover, glutathione-s-transferase activated in late July when the sea water temperature was exceptionally high and sp. experienced high oxidative stress. The combined effect of a heatwave, increased cyanobacteria, and decreased dinoflagellate abundance may have caused larger variability in reproductive output in the field. An increase of 7°C had a negative effect on egg production rate in the experiment. However, the effect on reproduction was relatively small, implying that sp. can tolerate warming at least within the temperature range of 9-16°C. However, our data from the experiment suggest a link between reproductive success and oxidative stress during warming, shown as a significant combined effect of temperature and catalase on egg production rate.

摘要

全球海洋生态系统正承受着气候变化引发的严重压力。波罗的海尤其容易受到持续变化的影响,比如变暖。本研究的目的是通过在芬兰湾西部采集野外样本,并在实验中测量一种关键桡足类物种对温度升高的生态生理反应。通过在环境温度和升高温度下孵育雌性桡足类以测量繁殖率和氧化应激,研究了热应激期间桡足类繁殖产出与氧化平衡之间的潜在权衡。我们的野外观察表明,谷胱甘肽循环在应激增加时具有明显反应,并且可能在预防氧化损伤方面发挥重要作用:在整个研究过程中,脂质过氧化以及还原型和氧化型谷胱甘肽的比例呈负相关。此外,谷胱甘肽 - S - 转移酶在7月下旬海水温度异常高且桡足类经历高氧化应激时被激活。热浪、蓝藻增加和甲藻丰度降低的综合影响可能导致野外繁殖产出的更大变异性。在实验中,温度升高7°C对产卵率有负面影响。然而,对繁殖的影响相对较小,这意味着桡足类至少在9 - 16°C的温度范围内能够耐受变暖。然而,我们的实验数据表明变暖期间繁殖成功与氧化应激之间存在联系,表现为温度和过氧化氢酶对产卵率的显著综合影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b3af/8855334/45b9dcd70d9d/ECE3-12-e8594-g006.jpg

文献检索

告别复杂PubMed语法,用中文像聊天一样搜索,搜遍4000万医学文献。AI智能推荐,让科研检索更轻松。

立即免费搜索

文件翻译

保留排版,准确专业,支持PDF/Word/PPT等文件格式,支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述,25分钟生成高质量综述,智能提取关键信息,辅助科研写作。

立即免费体验