Strain, cell density, and nutrient condition affect patterns of diurnal vertical migration and superoxide production in a red-tide alga

Author:

Shikata Tomoyuki,Kitatsuji Saho,Yuasa Koki

Abstract

A red tide occurs when cell densities of autotrophic microalgae and some heterotrophic protists increase dramatically and thereby change the color of the sea. Red tides sometimes have negative impacts on human activities, such as fisheries and tourism. Most red-tide flagellates display diurnal vertical migration (DVM) in which cells normally migrate upward during the day and downward at night. This behavior promotes active growth, due to the effective acquisition of nutrients and light, as well as population density increase and cell aggregation. However, the factors and their interactions influencing DVM remain to be clarified, such that no algorithm exists that can precisely simulate the DVM pattern and the development of a red tide in the field. Chattonella marina complex (hereafter Chattonella) is a representative microalga of harmful red tides and some previous studies has suggested that Chattonella’s DVM plays important roles in development of a red tide. Chattonella can produce a large amount of superoxide (•O2), which is responsible for the regulation of various physiological processes as well as its toxicity against microorganisms and animals. In the present study, we examined the effects of strain, growth phase, cell density, and nutrient deficiency on the pattern of DVM. In addition, we also measured the •O2 level in most experiments to assess the relationship between DVM and •O2 production. Some strains displayed clear DVM, whereas others aggregated at the surface all day in a fixed condition. Strains’ DVM patterns did not show a relationship with •O2 production. Moreover, the DVM became less clear at high cell density and in nitrogen- or phosphorus-depleted conditions. Although a previous study reported that the •O2 production rate increased during the light period and decreased during the dark period, regardless of cell density, the diurnal pattern of •O2 became less clear at a higher cell density in a Chattonella strain used in the present study. Our findings indicate that DVM and •O2 production by a Chattonella population composed of various strains can change across developmental phases and environmental conditions. This characteristic may produce adaptability in species and increase the chances of a massive population increase.

Publisher

Frontiers Media SA

Subject

Cell Biology,Developmental Biology

Reference53 articles.

1. Genetic parameter estimation for resistance to red tide raphidophyte Chattonella antiqua in Japanese yellowtail Seriola quinqueradiata;Akita;Aquacul. Res.,2022

2. Impacts of diel vertical migration of Chattonella antique (Raphidophyceae) on the benthic crustacean (Penaeus japonicus) in Ariake Bay;Araki;Rep. Kumamoto Pref. Fish. Res. Cent.,2013

3. Vertical migration by the marine dinoflagellate Prorocentrum triestinum maximises photosynthetic yield;Ault;Oecologia,2000

4. Methods to control harmful algal blooms: A review;Balaji-Prasath;Environ. Chem. Lett.,2022

5. Relating cell‐level swimming behaviors to vertical population distributions in Heterosigma akashiwo (Raphidophyceae), a harmful alga;Bearon;Limnol. Oceanogr.,2004

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3