Grazing Effects on Toxic and Non-Toxic Microcystis aeruginosa by the Mixotrophic Flagellate Ochromonas sp.
Grazing Effects on Toxic and Non-Toxic Microcystis aeruginosa by the Mixotrophic Flagellate Ochromonas sp.
复制标题
混合营养鞭毛藻 Ochromonas sp 对有毒和无毒铜绿微囊藻的放牧效应。
DOI：
10.1080/02705060.2009.9664308
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发表时间：
2009
影响因子：
1.3
通讯作者：
Myung‐Soo Han
中科院分区：
文献类型：
--
作者：
S. H. Baeka;Sung;Shin Young Song;Hae;S. Nakano;Myung‐Soo Han
摘要 我们研究了混合营养鞭毛虫 (MxFI) Ochromonas sp. 的放牧和特定生长率。当饲喂有毒铜绿微囊藻（NIES-88、NIES-298 和 NIES-44 菌株）和无毒菌株（NIES-101）时。 Ochromonas sp 的最大生长速率。铜绿假单胞菌 NIES-44 为 1.28 d−1，NIES-88 为 1.24 d−1，NIES-298 为 2.05 d−1，NIES-101 为 1.53 d−1。此外，Ochromonas sp 对每种微囊藻菌株的最大摄食率，铜绿微囊藻 NIES-44 为 4.32 猎物 MxFI−1 d−1，NIES-88 为 5.71 猎物 MxFI−1 d−1，NIES-101 为 2.12 猎物 MxFI−1 d−1。有趣的是，尽管 Ochromonas sp. 的生长速度。 NIES-298 菌株的摄入率高于任何其他菌株，但 NIES-298 的摄入率较低，与 NIES-101 相似。对于这种差异有两种可能的解释。首先，NIES-298 和 NIES-101 菌株的菌落形成可能会干扰摄入。其次，Ochromonas sp 可利用的培养基营养物质。尽管对猎物的放牧量较低，但足以支持其种群增长，因为这种鞭毛虫通过自养和吞噬的结合获得营养。鞭毛虫 Ochromonas sp。无论有毒和无毒的猎物类型如何，都表现出活跃的生长。
ABSTRACT We investigated grazing and specific growth rates of the mixotrophic flagellate (MxFI) Ochromonas sp. when fed toxic Microcystis aeruginosa (NIES-88, NIES-298, and NIES-44 strains) and a non-toxic strain (NIES-101). The maximum growth rates of Ochromonas sp. were 1.28 d−1 for M. aeruginosa NIES-44, 1.24 d−1 for NIES-88, 2.05 d−1 for NIES-298, and 1.53 d−1 for NIES-101. Also, the maximum ingestion rates on each Microcystis strain by Ochromonas sp, were 4.32 prey MxFI−1 d−1 for M. aeruginosa NIES-44, 5.71 prey MxFI−1 d−1 for NIES-88, and 2.12 prey MxFI−1 d−1 for NIES-101. Interestingly, although the growth rate of Ochromonas sp. with the NIES-298 strain was higher than it was for any of the other strains, its ingestion rate for NIES-298 was low and similar to that with NIES-101. There are two possible explanations for this difference. First, the colony formation by the NIES-298 and NIES-101 strains may have interfered with ingestion. Second, the medium nutrients available to Ochromonas sp. were sufficient to support its population growth despite low grazing on prey, since this flagellate gains its nutrients through a combination of autotrophy and phagotrophy. The flagellate Ochromonas sp. showed active growth regardless of toxic and non-toxic prey types.