Algicidal effects of yellow clay and the thiazolidinedione derivative TD49 on the fish-killing dinoflagellate Cochlodinium polykrikoides in microcosm experiments

Baek, Seung Ho; Shin, Kyoungsoon; Son, Moonho; Bae, Si Woo; Cho, Hoon; Na, Dong Hee; Kim, Young Ok; Kim, Si Wouk

doi:10.1007/s10811-014-0275-9

Cited by 15 publications

(4 citation statements)

References 33 publications

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“…According to Sommer [55] and Klaveness [56], the rapid growth In summer, the peridinin concentration (dinoflagellate marker) was relatively high at station 1, which reflected the occurrence of dinoflagellates found in the CHEMTAX analysis, and the high abundances of the mixotrophic dinoflagellate C. polykrikoides based on optical microscopy; a large bloom of C. polykrikoides was reported in water offshore of Gwangyang Bay. Blooms of C. polykrikoides cause huge economic losses to fishery industries because of the mass mortality of caged fish, and these blooms occur annually in Korean coastal waters [48,49]. In the present study the high density of C. polykrikoides corresponded to high chl-a and peridinin concentrations, implying that C. polykrikoides accounted for most of the measured peridinin in downstream areas, even though there was a relatively high density of diatoms in the SRE.…”

Section: Phytoplankton Population Dynamics In the Sresupporting

confidence: 43%

Comparison of HPLC Pigment Analysis and Microscopy in Phytoplankton Assessment in the Seomjin River Estuary, Korea

2020

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The distribution of microalgal species in estuaries shows marked gradients because of the mixing of marine and fresh water during tidal exchanges. To assess the spatio-temporal distribution of phytoplankton in the Seomjin River estuary (SRE), Korea, we investigated the seasonal phytoplankton communities along a salinity gradient in the estuary using both high performance liquid chromatography (HPLC) pigment analysis and light microscopy. Both types of analysis indicated that marine planktonic diatoms generally dominated at downstream sites having salinities >10, whereas freshwater species dominated at upstream sites having salinities <5. High levels of the pigments fucoxanthin and alloxanthin were found at upstream sites in the SRE in late spring. During summer, relatively high levels of the pigment peridinin were present in downstream areas of the SRE, and relatively high levels of diatoms occurred in upstream areas. In autumn, small Cryptomonas species were found in high abundance based on microscopic analysis, while CHEMTAX analysis of photosynthetic pigments showed relatively high concentrations of the diatom pigment fucoxanthin, implying the co-occurrence of a small unidentified phytoplankton. During winter, when the estuarine waters were well mixed, both the microscopic and CHEMTAX analyses showed that diatoms dominated at most stations. Seasonal and horizontal gradients in environmental conditions were clearly influenced by the salinity and nutrient loadings, especially the nitrate+nitrite and silicate concentrations. In particular, the ratio of photoprotective carotenoid pigments (PPCs) to photosynthetic carotenoid pigments (PSCs) was relatively low during all four seasons. This was predominately because of the high productivity of diatoms, which have a very low ratio of PPCs to PPSs. The SRE is a favorable habitat for diatoms because it is a high turbulence area having rapid water movement as a result of tidal changes. Overall, there was consistency in the data derived from the microscopy and chemotaxonomy analyses, suggesting that both methods are useful for analysis of the phytoplankton community structure in this complex estuarine and coastal water ecosystem.

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Section: Phytoplankton Population Dynamics In the Sresupporting

confidence: 43%

Comparison of HPLC Pigment Analysis and Microscopy in Phytoplankton Assessment in the Seomjin River Estuary, Korea

2020

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“…Even the co-existent bacteria group from C. marina, Alteromonas, Pseudomonas, and Flexibacter strains inhibited significantly on the growth of C. marina [60]. The role of bacteria also includes as the prey of C. ovata [49]; however, the obvious low growth rate of C. ovata may indicate the absence of predation behaviors of C. ovata in the present study.…”

Section: Ecological Significance Of the Growth And Hemolytic Activity Responsecontrasting

confidence: 54%

“…The ichthyotoxic effects were reported to be species or strain-specific in Chattonella [38], Phaeocystis [39], and other flagellates [40]; however, they are not solely related to the hemolytic activity or synergistic effects of HA and ROS [13,[41][42][43][44]. The role of predators [45], prey, or the presence of bacteria, including nutrient competition [46,47], nutrient supply, algae killer or allelopathic inducers [48][49][50][51], may also act as the key driver to the bloom dynamics or toxicological mechanisms of those toxic flagellates, resulting in great deferring response of growth and ichthyotoxicity.…”

Section: Introductionmentioning

confidence: 99%

Hemolytic Activity in Relation to the Photosynthetic System in Chattonella marina and Chattonella ovata

Tong

Gou

et al. 2021

Marine Drugs

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Chattonella species, C. marina and C. ovata, are harmful raphidophycean flagellates known to have hemolytic effects on many marine organisms and resulting in massive ecological damage worldwide. However, knowledge of the toxigenic mechanism of these ichthyotoxic flagellates is still limited. Light was reported to be responsible for the hemolytic activity (HA) of Chattonella species. Therefore, the response of photoprotective, photosynthetic accessory pigments, the photosystem II (PSII) electron transport chain, as well as HA were investigated in non-axenic C. marina and C. ovata cultures under variable environmental conditions (light, iron and addition of photosynthetic inhibitors). HA and hydrogen peroxide (H2O2) were quantified using erythrocytes and pHPA assay. Results confirmed that% HA of Chattonella was initiated by light, but was not always elicited during cell division. Exponential growth of C. marina and C. ovata under the light over 100 µmol m−2 s−1 or iron-sufficient conditions elicited high hemolytic activity. Inhibitors of PSII reduced the HA of C. marina, but had no effect on C. ovata. The toxicological response indicated that HA in Chattonella was not associated with the photoprotective system, i.e., xanthophyll cycle and regulation of reactive oxygen species, nor the PSII electron transport chain, but most likely occurred during energy transport through the light-harvesting antenna pigments. A positive, highly significant relationship between HA and chlorophyll (chl) biosynthesis pigments, especially chl c2 and chl a, in both species, indicated that hemolytic toxin may be generated during electron/energy transfer through the chl c2 biosynthesis pathway.

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“…Physical and mechanical methods include manual clearing of algal biomass, ball clay flocculating (Sun et al 1999), and changing light intensities (Han and Kim 2001;Pan et al 2003;Shen et al 2004). Chemical methods include algal biomass-clearing biocides (Cao et al 2008;Baek et al 2013Baek et al , 2014, and biotechnologies include growing (or planting) other safe macroalgae or microorganisms (Garry et al 1998;Kim et al 2008;Tilney et al 2014), bio-controlling reagents, plant repression, and fish feeding (Codd 2000;Xie 2003). Although some approaches work effectively in the short term, they may have potentially long-term negative consequences to the environment (Jeong et al 2000;Gumbo et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Inhibition of marine coastal bloom-forming phytoplankton by commercially cultivated Gracilaria lemaneiformis (Rhodophyta)

et al. 2014

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While harmful algal blooms (HABs) have become a threat to fisheries, environmental and public health, and economies worldwide, most of the approaches under investigations for prevention, control, and mitigation (PCM) of HABs are limited by high cost and possible secondary pollution. This study reports our laboratory and field experiments demonstrating effective growth-inhibiting effects of the widely cultivated seaweed Gracilaria lemaneiformis on phytoplankton possibly forming HABs. Laboratory experiments demonstrated significant growth-inhibiting effects of fresh G. lemaneiformis thalli in a dose-response manner on four of six test microalgae commonly observed in the seaweed cultivation area (Scrippsiella trochoidea, Prorocentrum micans, Skeletonema costatum, Dunaliella salina) and on the natural phytoplankton assemblage in seawater. Significant inhibiting effects were also observed from in situ bottle (1.0 L) and mesocosm (50 and 1000 L) experiments on the harmful alga Phaeocystis globosa during its blooms. Based on a large-scale field survey, the phytoplankton abundance in the areas with Gracilaria cultivation was demonstrated to be significantly lower than that in the areas without Gracilaria. Collectively, our results showed that large-scale cultivation of G. lemaneiformis is an effective approach to prevent HABs in coastal waters, as an added value to the economically viable industry of Gracilaria cultivation.

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Algicidal effects of yellow clay and the thiazolidinedione derivative TD49 on the fish-killing dinoflagellate Cochlodinium polykrikoides in microcosm experiments

Cited by 15 publications

References 33 publications

Comparison of HPLC Pigment Analysis and Microscopy in Phytoplankton Assessment in the Seomjin River Estuary, Korea

Comparison of HPLC Pigment Analysis and Microscopy in Phytoplankton Assessment in the Seomjin River Estuary, Korea

Hemolytic Activity in Relation to the Photosynthetic System in Chattonella marina and Chattonella ovata

Inhibition of marine coastal bloom-forming phytoplankton by commercially cultivated Gracilaria lemaneiformis (Rhodophyta)

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