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首页> 外文期刊>Harmful Algae >Feeding by the harmful phototrophic dinoflagellate Takayama tasmanica (Family Kareniaceae)
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Feeding by the harmful phototrophic dinoflagellate Takayama tasmanica (Family Kareniaceae)

机译：以有害的光养性鞭毛藻高山山塔斯马尼卡为食

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摘要

The trophic mode of a phototrophic dinoflagellate is a critical factor in the dynamics of its harmful algal bloom Recent discoveries of the mixotrophic capabilities of phototrophic dinoflagellates have changed the traditional view of bloom dynamics and prediction models Here, mixotrophy in the harmful phototrophic dinoflagellate Takayama tasmanica was examined Moreover, growth and ingestion rates of T. tasmanica on each of Alexandrium minutum CCMP1888 and Alexandrium tamarense CCMP1493, suitable prey, were determined as a function of prey concentration This study reported for the first time that T. tasmanica is a mixotrophic species Among the phytoplankton species offered as prey, T. tasmanica fed on all prey species whose equivalent spherical diameter (ESD) was greater than 30 mu m, but also A minutum whose ESD was 19 p mu m. In contrast, T. tasmanica did not feed on the phototrophic dinoflagellates Heterocapsa triquetra, Gymnodinium aureolum, Scrippsiella acuminata (previously S. trochoidea), Cochlodinium polykrikoides, Alexandrium affine, Alexandrium insuetum, and Alexandrium pacificum that its sister species Takayama helix is able to feed on With increasing mean prey concentration, ingestion rates of T. tasmanica on A minutum increased, but became saturated at the prey concentrations of 2130 cells ml(-1) (1070 ngC mL(-1)). The maximum ingestion rate (MIR) of T. tasmanica on A minutum was 0.5 ng C predator(-1) d(-1) (1.0 cells predator(-1) d(-1)) which is only 64% of the body carbon of a T. tasmnimca cell Growth rates of T. tasmnimca on A. minutum were not affected by prey concentrations. Thus, the low maximum ingestion rate is likely to be responsible for the small increases of its growth rate through mixotrophy. In addition, neither growth nor ingestion rates of T. tasmanica feeding on Alexanrinum tamarense were affected by prey concentrations The maximum ingestion rate of T. tasmanica on A. minutum was considerably lower than that of T. helix on the same prey species. Therefore, the mixotrophic ability of T. tasmanica is weaker than that of T. helix, and also T. tasmanica may have an ecological niche different from that of T. helix in marine ecosystems.
机译：光营养性鞭毛藻的营养模式是其有害藻华发生动力学的关键因素。光营养性鞭毛藻的营养能力的最新发现改变了水华动力学和预测模型的传统观点。在这里，有害光营养性鞭毛藻的高山营养是混合营养。此外，确定了合适的猎物亚历山大min CCMP1888和亚历山大marmarense CCMP1493上塔斯曼锥虫的生长和摄食率，是其捕食浓度的函数。该研究首次报道了塔斯曼锥虫是一种混合营养物种。作为浮游生物的浮游植物种类，塔斯马尼亚锥虫捕食所有等效球形直径（ESD）大于30μm的捕食物种，也捕食ESD等于19 pμm的小动物。相比之下，塔斯马尼亚锥虫不以光养性鞭毛鞭毛的杂食性鞭毛藻，裸藻裸藻，Scrippsiella acuminata（以前是trochoidea），多脉球藻，山梨仿生，山毛榉树皮和山毛榉属山T为食。随着平均猎物浓度的增加，塔斯马尼亚锥虫在细线虫上的摄入速率增加，但当猎物浓度> 2130细胞ml（-1）（1070 ngC mL（-1））时达到饱和。塔斯马尼卡锥虫在最大部位的最大摄食率（MIR）为0.5 ng C捕食者（-1）d（-1）（1.0细胞捕食者（-1）d（-1）），仅占人体的64％ tasmnimca细胞的碳ta.mnsumum上的tasmnimca生长速率不受猎物浓度的影响。因此，低的最大摄食率很可能是由于混合营养导致其增长率小幅增长的原因。此外，饲喂塔玛亚历山大藻的塔斯马尼亚锥虫的生长率和摄食率均不受猎物浓度的影响。在同一猎物上，塔斯曼尼塔猫在min虫中的最大摄食率明显低于螺旋线虫。因此，塔斯马尼亚锥虫的混合营养能力要弱于螺旋线虫，而且在海洋生态系统中塔斯马尼卡氏菌的生态位也可能不同于螺旋线虫。

著录项

  • 来源
    《Harmful Algae》 |2018年第4期|19-29|共11页
  • 作者

    Lim An Suk; Jeong Hae Jin; Ok Jin Hee; Kim So Jin;

  • 作者单位

    Seoul Natl Univ, Coll Nat Sci, Sch Earth & Environm Sci, Seoul 08826, South Korea;

    Seoul Natl Univ, Coll Nat Sci, Sch Earth & Environm Sci, Seoul 08826, South Korea;

    Seoul Natl Univ, Coll Nat Sci, Sch Earth & Environm Sci, Seoul 08826, South Korea;

    Seoul Natl Univ, Coll Nat Sci, Sch Earth & Environm Sci, Seoul 08826, South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Grazing; Growth; Harmful algal bloom; Ingestion; Mixotrophy; Red tide;

    机译：放牧;生长;有害藻华;食入;混合营养;赤潮;

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