Bloom formation potential in the harmful dinoflagellate Akashiwo sanguinea: Clues from movement behaviors and growth characteristics

Menden‐Deuer, Susanne; Montalbano, Amanda L.

doi:10.1016/j.hal.2015.06.001

Cited by 39 publications

(25 citation statements)

References 66 publications

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“…Growth rate variation at intra-specific level was also reported from a single bloom sample of A. sanguinea and with the same trend (Menden-Deuer and Montalbano, 2015). Therefore, the ecophysiological experiments in the present study are still informative although only a few strains were tested.…”

Section: Ecological Speciationsupporting

confidence: 71%

Cryptic diversity within the harmful dinoflagellate Akashiwo sanguinea in coastal Chinese waters is related to differentiated ecological niches

Luo¹,

Yang

Leaw

et al. 2017

Harmful Algae

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Blooms of the harmful dinoflagellate Akashiwo sanguinea are responsible for the mass mortality of fish and invertebrates in coastal waters. This cosmopolitan species includes several genetically differentiated clades. Four clonal cultures were established by isolating single cells from Xiamen Harbour (the East China Sea) for morphological and genetic analyses. The cultures displayed identical morphology but were genetically different, thus revealing presence of cryptic diversity in the study area. New details of the apical structure complex of Akashiwo sanguinea were also found. To investigate whether the observed cryptic diversity was related to environmental differentiation, 634 cells were obtained from seasonal water samples collected from 2008 to 2012. These cells were sequenced by single-cell PCR. For comparison with Chinese material, additional large subunit ribosomal DNA sequences were obtained for three established strains from Malaysian and French waters. To examine potential ecological differentiation of the distinct genotypes, growth responses of the studied strains were tested under laboratory conditions at temperatures of 12°C to 33°C. These experiments showed four distinct ribotypes of A. sanguinea globally, with the ribotypes A and B co-occuring in Xiamen Harbour. Ribotype A of A. sanguinea was present year-round in Xiamen Harbour, but it only bloomed in the winter and spring, thus corresponding to the winter type. In contrast, A. sanguinea ribotype B bloomed only in the summer, corresponding to the summer type. This differentiation supports the temperature optimum conditions that were established for these two ribotypes in the laboratory. Ribotype A grew better at lower temperatures compared to ribotype B which preferred higher temperatures. These findings support the idea that various ribotypes of A. sanguinea correspond to distinct ecotypes and allopatric speciation occurred in different climatic regions followed by dispersal.

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Section: Ecological Speciationsupporting

confidence: 71%

Cryptic diversity within the harmful dinoflagellate Akashiwo sanguinea in coastal Chinese waters is related to differentiated ecological niches

Luo¹,

Yang

Leaw

et al. 2017

Harmful Algae

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“…Enabled by recent advances in measurement capacity, key traits subject to selection show surprising diversity. A non-exhaustive list of examples of highly variable traits includes elemental composition, morphology, physiology, and behavior (Boyd et al 2013;Moal et al 1987;Rynearson and Virginia Armbrust 2004;Fredrickson et al 2011;Kiørboe 2013;Menden-Deuer and Montalbano 2015). Such intra-specific variability has even been documented in marine metazoa (Morozov et al 2013).…”

Section: Introductionmentioning

confidence: 99%

The theory of games and microbe ecology

Menden‐Deuer

Rowlett

2018

Theor Ecol

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Using game theory, we provide mathematical proof that if a species of asexually reproducing microbes is not characterized by maximum variability in competitive abilities among its individual organisms, then that species is vulnerable to replacement by competitors. Furthermore, we prove that such maximally variable species are neutral towards each other in competition for limited resources; they coexist. Our proof is constructive: given one species which does not possess maximum variability, we construct a second species with the same (or lower) mean competitive ability which can outcompete the first, in the sense that its expected value in competition is positive, whereas the expected value of the non-maximally variable species is negative. Our results point towards the mechanistic underpinnings for the frequent observations that (1) microbes are characterized by large intra-specific variability and that (2) the number of extant microbe species is very large.

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“…, Johnson ). Furthermore, many phototrophic dinoflagellates cause red tides or harmful algal blooms which often cause large scale mortality of finfish and shellfish (Juhl , Menden‐Deuer and Montalbano ). Thus, interest in eco‐physiology of phototrophic dinoflagellates is increasing.…”

mentioning

confidence: 99%

“…Some phototrophic dinoflagellates are exclusively autotrophic, whereas other phototrophic dinoflagellates are mixotrophic (Stoecker 1999, Burkholder et al 2008, Johnson 2015. Furthermore, many phototrophic dinoflagellates cause red tides or harmful algal blooms which often cause large scale mortality of finfish and shellfish (Juhl 2005, Menden-Deuer andMontalbano 2015). Thus, interest in eco-physiology of phototrophic dinoflagellates is increasing.…”

mentioning

confidence: 99%

Effects of light and temperature on the growth of Takayama helix (Dinophyceae): mixotrophy as a survival strategy against photoinhibition

Jeong

Lim

et al. 2019

Journal of Phycology

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Takayama helix is a mixotrophic dinoflagellate that can feed on diverse algal prey. We explored the effects of light intensity and water temperature, two important physical factors, on its autotrophic and mixotrophic growth rates when fed on Alexandrium minutum CCMP1888. Both the autotrophic and mixotrophic growth rates and ingestion rates of T. helix on A. minutum were significantly affected by photon flux density. Positive growth rates of T. helix at 6–58 μmol photons · m−2 · s−1 were observed in both the autotrophic (maximum rate = 0.2 · d−1) and mixotrophic modes (0.4 · d−1). Of course, it did not grow both autotrophically and mixotrophically in complete darkness. At ≥247 μmol photons · m−2 · s−1, the autotrophic growth rates were negative (i.e., photoinhibition), but mixotrophy turned these negative rates to positive. Both autotrophic and mixotrophic growth and ingestion rates were significantly affected by water temperature. Under both autotrophic and mixotrophic conditions, it grew at 15–28°C, but not at ≤10 or 30°C. Therefore, both light intensity and temperature are critical factors affecting the survival and growth of T. helix.

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Bloom formation potential in the harmful dinoflagellate Akashiwo sanguinea: Clues from movement behaviors and growth characteristics

Cited by 39 publications

References 66 publications

Cryptic diversity within the harmful dinoflagellate Akashiwo sanguinea in coastal Chinese waters is related to differentiated ecological niches

Cryptic diversity within the harmful dinoflagellate Akashiwo sanguinea in coastal Chinese waters is related to differentiated ecological niches

The theory of games and microbe ecology

Effects of light and temperature on the growth of Takayama helix (Dinophyceae): mixotrophy as a survival strategy against photoinhibition

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