The influence of decreased salinity levels on the survival, growth and physiology of eelgrass Zostera marina

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research Pub Date : 2022-12-01 DOI:10.1016/j.marenvres.2022.105787

Yan-Hao Zhang , Bing Yu , You-Cai Liu , Wang Ma , Wen-Tao Li , Pei-Dong Zhang

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引用次数: 2

Abstract

Low salinity generally promotes the growth and propagation of temperate seagrasses, but the appropriate range is unclear. We subjected shoots of eelgrass Zostera marina to different salinity levels [10, 15, 20, 25, 30 PSU (control)] for 6 weeks under controlled laboratory conditions. We measured eelgrass responses in terms of survivorship, growth, productivity, leaf pigmentation and carbohydrate concentrations. Survival analysis combined with growth assessment suggested that the optimal salinity range for the propagation of Z. marina shoots was 18–21 PSU. Structural equation model (SEM) analysis indicated that the promotion effect of decreased salinity levels on the survival and growth of Z. marina shoots mainly depended on the increase in chlorophyll content and the accumulation and synthesis of nonstructural carbohydrates. The carotenoid content and soluble sugar content of the aboveground tissues of Z. marina shoots exposed to 20 PSU were 1.1 and 1.6 times higher than those of shoots under the control, respectively. The results will provide valuable data that could prove helpful in the development of efficient artificial propagation technology for Z. marina shoots.

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盐度降低对鳗草Zostera marina的生存、生长和生理的影响。

低盐度通常促进温带海草的生长和繁殖，但合适的范围尚不清楚。我们在受控的实验室条件下，将鳗草Zostera marina的芽置于不同的盐度水平[10，15，20，25，30PSU（对照）]下6周。我们测量了鳗草在存活率、生长、生产力、叶片色素沉着和碳水化合物浓度方面的反应。存活分析与生长评估相结合表明，卤虫芽繁殖的最佳盐度范围为18-21 PSU。结构方程模型（SEM）分析表明，盐度降低对卤苗存活和生长的促进作用主要取决于叶绿素含量的增加以及非结构碳水化合物的积累和合成。暴露于20个PSU的卤苗地上组织的类胡萝卜素含量和可溶性糖含量分别是对照的1.1倍和1.6倍。研究结果将提供有价值的数据，有助于开发有效的人工繁殖技术。

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 environmental research 环境科学-毒理学

CiteScore

5.90

自引率

3.00%

发文量

217

审稿时长

46 days

期刊介绍： Marine Environmental Research publishes original research papers on chemical, physical, and biological interactions in the oceans and coastal waters. The journal serves as a forum for new information on biology, chemistry, and toxicology and syntheses that advance understanding of marine environmental processes. Submission of multidisciplinary studies is encouraged. Studies that utilize experimental approaches to clarify the roles of anthropogenic and natural causes of changes in marine ecosystems are especially welcome, as are those studies that represent new developments of a theoretical or conceptual aspect of marine science. All papers published in this journal are reviewed by qualified peers prior to acceptance and publication. Examples of topics considered to be appropriate for the journal include, but are not limited to, the following: – The extent, persistence, and consequences of change and the recovery from such change in natural marine systems – The biochemical, physiological, and ecological consequences of contaminants to marine organisms and ecosystems – The biogeochemistry of naturally occurring and anthropogenic substances – Models that describe and predict the above processes – Monitoring studies, to the extent that their results provide new information on functional processes – Methodological papers describing improved quantitative techniques for the marine sciences.