Are tintinnids picky grazers: Feeding experiments on a mixture of mixotrophic dinoflagellates and implications for red tide dynamics
Are tintinnids picky grazers: Feeding experiments on a mixture of mixotrophic dinoflagellates and implications for red tide dynamics
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丁丁虫是挑剔的食草动物吗：混合营养甲藻混合物的喂养实验及其对赤潮动力学的影响
DOI：
10.1016/j.marpolbul.2019.110488
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发表时间：
2019
影响因子：
5.8
通讯作者：
Wiltshire Karen Helen
中科院分区：
文献类型：
--
作者：
Yang Jinpeng;Loeder Martin Guenter Joachim;Jiang Yong;Wiltshire Karen Helen
为了了解和预测赤潮的爆发，往往是占主导地位的兼养甲藻（MTDs），“自上而下”的控制，共发生的捕食者对赤潮MTDs的影响，应该考虑。本文研究了在单一和混合捕食条件下，刺壳纤毛虫Favella ehrenbergii对两种赤潮MTD--锥状斯氏藻（Scrippsiella trochoidea）和三角异囊藻（Heterocapsa triquetra）的数量和功能反应。我们的研究结果表明，混合饮食可以支持一个更好的增长捕食者相比，单一的饮食。此外，捕食者更喜欢吃草。trochoidea的混合饮食，这表明捕食者可能会改变他们的饮食偏好。捕食性天敌的摄食对赤潮的发生具有潜在的抑制作用。这项研究的发现为理解海洋微生物食物网中复杂的捕食者-被捕食者关系以及由MTDs主导的赤潮动力学提供了基础数据和新的见解。
To understand and predict the outbreak of red tides, which are often dominated by mixotrophic dinoflagellates (MTDs), the effects of “top-down” control by co-occurring predators on red-tide MTDs should be taken into consideration. We studied the numerical and functional responses of the tintinnid ciliateFavella ehrenbergiifeeding on two red-tide MTDs,Scrippsiella trochoideaandHeterocapsa triquetra, under single and mixed prey conditions. Our results suggest that a mixed diet could support a better growth of predators compared to a monodiet. In addition, the predators preferred to grazeS. trochoideain the mixed diets, suggesting that predators may switch their feeding preference. The grazing by tintinnid predators could potentially inhibit the outbreaks of red tides dominated by MTDs. The findings in this study provide basic data and new insights for understanding the complex predator-prey relationships in marine microbial food webs, and the dynamics of red tides dominated by MTDs.