Effect of ultraviolet radiation on clearance rate of planktonic copepods with different photoprotective strategies

IF 0.9 3区生物学 Q3 MARINE & FRESHWATER BIOLOGY

International Review of Hydrobiology Pub Date : 2019-03-03 DOI:10.1002/iroh.201801960

Cecilia Laspoumaderes, Marcela Bastidas Navarro, María S. Souza, Beatriz Modenutti, Esteban Balseiro

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引用次数: 7

Abstract

We studied two populations of Boeckella gracilipes and two populations of Boeckella gibbosa that inhabit mountain lakes from North-Patagonian Andes with different optical properties. We combined field and laboratory experiments to determine the effects of ultraviolet radiation (UVR) on clearance rate among these taxa that had different UVR defences. The copepod populations differed in photoprotective compounds (carotenoids and mycosporine-like amino acids [MAAs]) and antioxidant enzymes (glutathione S-transferase [GST]). These variations were related to elevation, dissolved organic carbon content and the optical features of the inhabited lakes. Laboratory experiments showed a decrease in the clearance rate (CR) in all populations exposed to UVR. Consistently, the long-term field experiment showed a negative impact of UVR on CR. We conclude that UVR exposure affects feeding, however, the magnitude of this negative effect depends on the exposure intensity and the photoprotective mechanisms used by zooplankton.

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紫外线辐射对不同光防护策略浮游桡足类清除率的影响

本文研究了栖息在北巴塔哥尼亚安第斯山脉湖泊的两个种群，它们具有不同的光学特性。通过野外和室内试验相结合的方法，确定了紫外线辐射对具有不同紫外线防御能力的类群清除率的影响。桡足动物种群在光保护化合物(类胡萝卜素和类真菌菌素氨基酸[MAAs])和抗氧化酶(谷胱甘肽s -转移酶[GST])方面存在差异。这些变化与海拔高度、溶解有机碳含量和湖泊光学特征有关。实验室实验表明，在所有暴露于紫外线辐射的人群中，清除率(CR)都有所下降。长期野外实验结果表明，UVR暴露对浮游动物摄食有影响，但这种影响的程度取决于暴露强度和浮游动物的光保护机制。

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

International Review of Hydrobiology 生物-海洋与淡水生物学

CiteScore

4.10

自引率

10.50%

发文量

审稿时长

3 months

期刊介绍： As human populations grow across the planet, water security, biodiversity loss and the loss of aquatic ecosystem services take on ever increasing priority for policy makers. International Review of Hydrobiology brings together in one forum fundamental and problem-oriented research on the challenges facing marine and freshwater biology in an economically changing world. Interdisciplinary in nature, articles cover all aspects of aquatic ecosystems, ranging from headwater streams to the ocean and biodiversity studies to ecosystem functioning, modeling approaches including GIS and resource management, with special emphasis on the link between marine and freshwater environments. The editors expressly welcome research on baseline data. The knowledge-driven papers will interest researchers, while the problem-driven articles will be of particular interest to policy makers. The overarching aim of the journal is to translate science into policy, allowing us to understand global systems yet act on a regional scale. International Review of Hydrobiology publishes original articles, reviews, short communications, and methods papers.