Preliminary explorations of environmental tolerances and growth rates of holopelagic Sargassum morphotypes

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany Pub Date : 2023-10-14 DOI:10.1016/j.aquabot.2023.103723

Jeffrey M. Schell , Deborah S. Goodwin , Rebecca H. Volk , Amy N.S. Siuda

{"title":"Preliminary explorations of environmental tolerances and growth rates of holopelagic Sargassum morphotypes","authors":"Jeffrey M. Schell , Deborah S. Goodwin , Rebecca H. Volk , Amy N.S. Siuda","doi":"10.1016/j.aquabot.2023.103723","DOIUrl":null,"url":null,"abstract":"<div>To predict spatial and temporal dynamics of macroalgal blooms, including the Great Atlantic Sargassum Belt, understanding the environmental tolerances and growth rates of different species under varying conditions is essential. A series of preliminary experiments were conducted exposing three common holopelagic Sargassum morphotypes to different temperature (21.6–30.6 °C) and salinity (26.2–40.0 psu) conditions. Sargassum tolerance was assessed by two methods: a Health Metric calculated daily from changes in a specimen’s blade and vesicle count and coloration patterns, and growth rates determined from pre- and post-treatment wet weights. Morphotypes exhibited different responses to treatment conditions. Health Metric values and growth rates for S. fluitans III were not significantly impacted by tested temperatures or salinities. S. natans I tolerated a wide range of temperatures but only moderate salinities. While S. natans VIII grew well and maintained strong Health Metrics across examined salinities, it was less tolerant of cold temperatures and exhibited overall lower growth rates than other morphotypes. Given inconsistent findings among recent growth rate studies, including this one, additional experiments of longer duration that continue to explore temperature and salinity effects and use specimens from across holopelagic Sargassum’s geographic range are necessary to understand growth ecology and parameterize models.</div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"190 ","pages":"Article 103723"},"PeriodicalIF":1.9000,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0304377023001080/pdfft?md5=96f87d6ee7e9348b708eebcaa417dfe3&pid=1-s2.0-S0304377023001080-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aquatic Botany","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0304377023001080","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MARINE & FRESHWATER BIOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

To predict spatial and temporal dynamics of macroalgal blooms, including the Great Atlantic Sargassum Belt, understanding the environmental tolerances and growth rates of different species under varying conditions is essential. A series of preliminary experiments were conducted exposing three common holopelagic Sargassum morphotypes to different temperature (21.6–30.6 °C) and salinity (26.2–40.0 psu) conditions. Sargassum tolerance was assessed by two methods: a Health Metric calculated daily from changes in a specimen’s blade and vesicle count and coloration patterns, and growth rates determined from pre- and post-treatment wet weights. Morphotypes exhibited different responses to treatment conditions. Health Metric values and growth rates for S. fluitans III were not significantly impacted by tested temperatures or salinities. S. natans I tolerated a wide range of temperatures but only moderate salinities. While S. natans VIII grew well and maintained strong Health Metrics across examined salinities, it was less tolerant of cold temperatures and exhibited overall lower growth rates than other morphotypes. Given inconsistent findings among recent growth rate studies, including this one, additional experiments of longer duration that continue to explore temperature and salinity effects and use specimens from across holopelagic Sargassum’s geographic range are necessary to understand growth ecology and parameterize models.

查看原文本刊更多论文

全海马尾藻形态的环境耐受性和生长速率的初步探讨

为了预测包括大大西洋马尾藻带在内的大型藻华的时空动态，了解不同物种在不同条件下的环境耐受性和生长速度至关重要。在不同温度(21.6 ~ 30.6℃)和盐度(26.2 ~ 40.0 psu)条件下，对三种常见的全海马尾藻形态进行了初步实验。马尾藻耐受性通过两种方法进行评估:根据标本叶片和囊泡计数以及颜色模式的变化每日计算的健康度量，以及根据处理前和处理后湿重确定的生长速率。不同的形态对不同的处理条件有不同的反应。流感链球菌III的健康度量值和生长速率不受测试温度或盐度的显著影响。纳坦斯海蛞蝓能忍受很宽的温度范围，但只能忍受中等的盐度。虽然S. natans VIII在检测的盐度中生长良好，并保持了很强的健康指标，但它对低温的耐受性较差，总体上表现出比其他形态更低的生长速度。鉴于最近的生长速率研究结果不一致，包括本研究，有必要进行更长时间的实验，继续探索温度和盐度的影响，并使用来自全底藻地理范围的标本，以了解生长生态学和参数化模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Aquatic Botany 生物-海洋与淡水生物学

CiteScore

3.80

自引率

5.60%

发文量

审稿时长

6 months

期刊介绍： Aquatic Botany offers a platform for papers relevant to a broad international readership on fundamental and applied aspects of marine and freshwater macroscopic plants in a context of ecology or environmental biology. This includes molecular, biochemical and physiological aspects of macroscopic aquatic plants as well as the classification, structure, function, dynamics and ecological interactions in plant-dominated aquatic communities and ecosystems. It is an outlet for papers dealing with research on the consequences of disturbance and stressors (e.g. environmental fluctuations and climate change, pollution, grazing and pathogens), use and management of aquatic plants (plant production and decomposition, commercial harvest, plant control) and the conservation of aquatic plant communities (breeding, transplantation and restoration). Specialized publications on certain rare taxa or papers on aquatic macroscopic plants from under-represented regions in the world can also find their place, subject to editor evaluation. Studies on fungi or microalgae will remain outside the scope of Aquatic Botany.