ブルーム盛期における麻痺性貝毒原因プランクトンAlexandrium tamarense の日周鉛直移動,環境要因および細胞毒量の変化

@article{2010AlexandriumT,
  title={ブルーム盛期における麻痺性貝毒原因プランクトンAlexandrium tamarense の日周鉛直移動,環境要因および細胞毒量の変化},
  author={圭吾 山本 and 幸彦 松山 and 博昭 大美 and 啓之 有山},
  journal={Nippon Suisan Gakkaishi},
  year={2010},
  volume={76},
  pages={877-885}
}
Alexandrium tamarense 赤潮が確認された 2007 年春期に堺出島漁港で昼夜観測を行い,日周鉛直移動と環境,細胞毒量の変化を調査した。日中,遊泳細胞は表層に集中分布したが,日没後分散し,底層で密度が増加した。夜明け後は再び表層で増加しており,日周鉛直移動が確認された。細胞の毒組成に変化はなかったが,細胞毒量は日没以降夜明けまで増加傾向であった。このことから毒は夜間に蓄積すると推察され,高毒細胞が鉛直移動することで深所に分布するアカガイ等で貝毒のリスクが高くなることが示唆された。 
6 Citations
Monitoring of the toxic dinoflagellate Alexandrium catenella in Osaka Bay, Japan using a massively parallel sequencing (MPS)-based technique.
TLDR
The yearly abundance pattern of A. catenella cells obtained by morphology-based counting coincided with the relative sequence abundances, which supports the effectiveness of MPS-based phytoplankton monitoring.
Influences of diurnal sampling bias on fixed-point monitoring of plankton biodiversity determined using a massively parallel sequencing-based technique.
TLDR
No significant differences were observed between the samples obtained from a different locality (Kusuura in Yatsushiro Sea) and at different dates, suggesting that the influence of diurnal sampling bias on plankton diversity, determined using the MPS-based survey, was not significant and acceptable.
Temporal changes and differences in the toxin contents and the profiles between arc shell and Japanese cockle contaminated with paralytic shellfish toxin in Osaka Bay, eastern Seto Inland Sea, Japan
TLDR
It was suggested that toxins in Japanese cockle were rapidly excreted without any in vivo conversions of toxins from the causative dino‰agellates.
Comparing diatom and Alexandrium catenella/tamarense blooms in Thau lagoon: Importance of dissolved organic nitrogen in seasonally N-limited systems
TLDR
Field results indicate a significant drop (from 22–25 to 15–16 μM over 3 days) in dissolved organic nitrogen at the bloom peak, as well as a significant inverse relationship between A. catenella/tamarense cell density and DON concentrations that is not apparent for diatom blooms.
Acclimation and toxicity of high ammonium concentrations to unicellular algae.
TLDR
Chlorophytes were significantly more tolerant to high ammonium than diatoms, prymnesiophytes, dinoflagellates, and raphidophytes which were the least tolerant and toxicity is likely associated with the ammonium ion rather than ammonia.

References

SHOWING 1-10 OF 15 REFERENCES
Occurrence and toxin production of Alexandrium spp. (Dinophyceae) in coastal waters of Iwate Prefecture, Japan
TLDR
It is confirmed that A. ostenfeldii, A. pseudogonyaulax, and A. tamutum will not be competing in the 2016 Rio Olympics.
Differences in accumulation and elimination of paralytic shellfish toxins among oyster, scallop and mussel
TLDR
Familiarity, ease of access, trust, and awareness of benefits and risks will all be improved.
Daytime and nighttime vertical migrations of Alexandrium tamarense in the St. Lawrence estuary (Canada)
TLDR
The ability of A. tamarense to reach the deep nitrate reservoir at night allows this species to reach elevated biomass as observed during red-tide events, and could push this species toward phosphate limitation in the St. Lawrence estuary.
Comparative study on the PSP component and toxicity produced by Alexandrium tamiyavanichii (Dinophyceae) strains occurring in Japanese coastal water
TLDR
The toxic components in all strains among the four localities were closely related, and thus the recent A. tamiyavanichii population in the Seto Inland Sea appears to originate from a single population.
The seasonal occurrence of Alexandrium tamarense (Dinophyceae) vegetative cells in Hiroshima Bay, Japan
TLDR
Environmental features indicate that the occurrence of vegetative cells of A.Tamarense seems to be explained by temperature and nutrient conditions and that the A. tamarense bloom developed subsequently to or concomitantly with the diatom spring bloom.
Mechanisms to initiate a Heterosigma akashiwo red tide in Osaka bay
TLDR
The results reveal that H. akashiwo migrates toward the sea surface to carry out photosynthesis effectively, and to the bottom to utilize nutrients efficiently.
Eutrophication and occurrences of harmful algal blooms in the Seto Inland Sea, Japan
TLDR
A new finding of the abundant existence of algicidal bacteria on the surface of seaweeds suggests that co-culturing fish and seaweed is a prevention strategy for harmful algal blooms by virtue of the continuous release of many alg suicidal bacteria to the surrounding seawater.
The growth and cyst formation of a toxic dinoflagellate, Alexandrium tamarense, at low water temperatures in northeastern Japan.
TLDR
Results indicate that A. tamarense grows with considerably higher growth rate and transforms to cysts in high numbers, in low water temperatures in the field, which suggests cyst formation may have been induced by depletion of phosphorus source.
Variation of Toxin Production and Composition in Axenic Cultures of Alexandrium catenella and A.tamarense.
TLDR
The results and the previous result regarding mendelian inheritance of toxin composition suggest that toxin composition differences have a genetic basis in Alexandrium.
Comparison of Toxin Composition Between Populations of Alexandrium spp. from Geographically Distant Areas.
TLDR
The results indicate the occurence of inter-and intra-specific indigenous populations from distant localities, and the toxin profiles separate one morphospecies into two regional populations.
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