Effects of temperature, salinity, and photosynthetic photon flux density on the growth of the harmful diatom Asteroplanus karianus in the Ariake Sea, Japan

Shikata, Tomoyuki; Matsubara, Terutake; Yoshida, Makoto; Sakamoto, Setsuko; Yamaguchi, Mineo

doi:10.1007/s12562-015-0930-3

Cited by 11 publications

(3 citation statements)

References 32 publications

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“…In terms of microalgae studies, Xu et al (2017) unravelled a pattern of decreasing temperature tolerance range for Phaeocystis globosa with suboptimal (decreasing) salinities. Similar observations were made for the marine diatom Asteroplanus karianus (Shikata et al, 2015). These latter studies, however, all investigated marine taxa and salinity concentrations below optimal level as a stressor, in contrast to a freshwater situation.…”

Section: Variation In the Sensitivity Of Thermal Tolerance To Salinit...supporting

confidence: 70%

Influence of salinity on the thermal tolerance of aquatic organisms

Farias,

Beszteri,

Burfeid Castellanos

et al. 2024

Preprint

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Aquatic organisms are challenged by changes in the external environment, such as temperature and salinity fluctuations. The response of an organism to temperature changes can be modified by salinity, thus pointing at the potential interaction of both variables. In the present study, we tested this assumption for freshwater, brackish, and marine organisms, including algae, macrophytes, heterotrophic protists, parasites, invertebrates, and fish. We reviewed the existing body of literature on potential interactions between temperature and salinity and performed a meta-analysis that compared the thermal tolerance (characterized by the temperature optima, lower and upper temperature limits, and thermal breadths). The final database includes 90 relevant publications (algae: 15; heterotrophic protists: 1; invertebrates: 43; and fish: 31). Relevant publications for microphytes and parasites were not available. Overall, our results show that decreasing salinity significantly increased the lower temperature limits and decreased the upper temperature limits irrespective of the organism groups. These findings mainly reflect the response to salinity changes in brackish and marine systems that dominate our database. Although the number of studies on freshwater species was limited, they showed negative, although statistically nonsignificant, effects of an increased salinity on the thermal tolerance of these species (i.e. increased lower limits and decreased upper limits). In addition, our meta-analysis shows nonsignificant differences in the responsiveness of thermal tolerance to salinity changes among different groups of organisms, but the sensitivity of thermal tolerance to salinity changes generally followed the order: algae > invertebrates > fish. Facing the impact of climate change, our findings point at adverse effects of salinity changes on the temperature tolerance of aquatic organisms. Further studies that investigate the thermal performance of freshwater species at various salinity gradients are required to broaden the evidence for interactions between salinity and temperature tolerance. This also applies to the influence of parasitic infections, which have been found to modulate the temperature tolerance of aquatic invertebrates and fish.

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Section: Variation In the Sensitivity Of Thermal Tolerance To Salinit...supporting

confidence: 70%

Influence of salinity on the thermal tolerance of aquatic organisms

Farias,

Beszteri,

Burfeid Castellanos

et al. 2024

Preprint

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“…Study findings [14] indicate that in Ariake coastal waters, Japan Asteroplanus karianus is a dangerous diatom species because it can cause bleaching in Pyropia. Field study findings show that A. karianus causes red tides only in winter on most beaches, such as the western and eastern waters of the Dutch coastal waters, Baltic coastal waters, and Ariake coastal waters.…”

Section: A the Diatom Species Densitymentioning

confidence: 87%

The Diatom Community in Maluk Coastal Water in West Sumbawa

Komalasari¹,

Khairuddin²,

Japa³

2020

Proceedings of the 1st Annual Conference on Education and Social Sciences (ACCESS 2019)

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The existence of diatoms greatly affects the life in the water as it plays some important roles as a source of food for various organisms in aquatic ecosystems. In addition, the diatoms existence is commonly used as an environmental bioindicator. The purpose of this study was to determine the diatom community structure in the Maluk Coastal waters. The water sample was taken from three coastal waters areas by using plankton net of 20 µm in size and there thirty-eight diatom species were identified. Data of diatom community were analyzed by using parameters of density, species diversity index, species evenness index, and values of importance for diatom species. The density of diatom in all sampling sites is 1600 ind./L. Five species of diatoms that have the highest density were Asteroplanus karianus (573.333 ind./L), Thalassiothrix longissima (423.333 ind./L), Striatella unipunctata (130 ind / L), Gyrosigma scalprum (50 ind / L), and Licmophora abbreviate (40 ind/L). The diversity index value of the diatom species was in moderate category (1.964). Asteroplanus karianus was a species that can be found in all three sampling sites and with the highest value of importance of 40.751%. The diatom species evenness index was 0.522, which means that the diatom species were not distributed evenly, because there were several species dominating with a large number of individuals at certain sampling sites.

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“…Several researchers reported the effects of water temperature, salinity, JARQ 53 (3) 2019 Y. Tomaru et al nutrients, and light intensity on A. karianus (Yamaguchi et al 2014, Shikata et al 2015. Biological factors, such as predators and algicidal bacteria, are also considered important factors that determine diatom dynamics.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Analysis of Diatom-infecting Viruses in Ariake Sound, Japan

Tomaru

Matsubara

Mine

et al. 2019

JARQ

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Certain marine diatoms can be harmful to seaweed cultivation farms, resulting in loss of yield and quality. Diatoms are exposed to viral attack; to date, more than 20 diatom-infecting viruses have been isolated and characterized to different extents. Nevertheless, no data have been reported on viruses infecting the harmful bloom-forming diatom Asteroplanus karianus, which causes bleaching of cultured Pyropia. In this study, we successfully isolated a novel virus that infects A. karianus from the sediment of the Ariake Sound, which is famous for its nori cultivation. The virion was 21 nm in diameter and exhibited apparent host cell lysis over 10 days post inoculation. Moreover, using degenerate PCR targeting the RNA-dependent RNA polymerase (RdRp) domain, ssRNA virus sequences were detected from a natural diatom bloom population, which included A. karianus, collected in the Ariake Sound. The phylogenetic analysis showed that the detected sequence was monophyletic with diatom-infecting ssRNA virus members at a bootstrap value of 85%. These results indicated that viruses infecting A. karianus are present in the Ariake Sound and may play a role in decreasing the diatom populations in natural environments.

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Effects of temperature, salinity, and photosynthetic photon flux density on the growth of the harmful diatom Asteroplanus karianus in the Ariake Sea, Japan

Cited by 11 publications

References 32 publications

Influence of salinity on the thermal tolerance of aquatic organisms

Influence of salinity on the thermal tolerance of aquatic organisms

The Diatom Community in Maluk Coastal Water in West Sumbawa

Preliminary Analysis of Diatom-infecting Viruses in Ariake Sound, Japan

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