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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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초록· 키워드
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We explored phagotrophy of the phototrophic ciliate Mesodinium rubrum on the cyanobacterium Synechococcus. The ingestion and clearance rates of M. rubrum on Synechococcus as a function of prey concentration were measured. In addition, we calculated grazing coefficients by combining the field data on abundance of M. rubrum and co-occurring Synechococcus spp. with laboratory data on ingestion rates. The ingestion rate of M. rubrum on Synechococcus sp. linearly increased with increasing prey concentrations up to approximately 1.9 × 10<sup>6</sup> cells mL<sup>-1</sup>, to exhibit sigmoidal saturation at higher concentrations. The maximum ingestion and clearance rates of M. rubrum on Synechococcus were 2.1 cells predator<sup>-1</sup> h<sup>-1</sup> and 4.2 nL predator<sup>-1</sup> h<sup>-1</sup>, respectively. The calculated grazing coefficients attributable to M. rubrum on cooccurring Synechococcus spp. reached 0.04 day<sup>-1</sup>. M. rubrum could thus sometimes be an effective protistan grazer of Synechococcus in marine planktonic food webs. M. rubrum might also be able to form recurrent and massive blooms in diverse marine environments supported by the unique and complex mixotrophic arrays including phagotrphy on hetrotrophic bacteria and Synechococcus as well as digestion, kleptoplastidy and karyoklepty after the ingestion of cryptophyte prey.
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참고문헌 (58)
참고문헌 신청
Apple, J. K / 2011 / Variability in protist grazing and growth on different marine Synechococcus isolates / Appl. Environ. Microbiol 77:3074~3084
Berge, T / 2008 / Feeding mechanism, prey specificity and growth in light and dark of the plastidic dinoflagellate Karlodinium armiger / Aquat. Microb. Ecol 50:279~288
Boenigk, J / 2001 / The influence of preculture conditions and food quality on the ingestion and digestion process of three species of heterotrophic nanoflagellates / Microb. Ecol 42:168~176
Burkill, P. H / 1993 / Synechococcus and its importance to the microbial foodweb of the northwestern Indian Ocean / Deep Sea Res. II Top. Stud. Oceanogr 40:773~782
Christaki, U / 2002 / Dynamic characteristics of Prochlorococcus and Synechococcus consumption by bacterivorous nanoflagellates / Microb. Ecol 43:341~352
Berge, T / 2008 / Feeding mechanism, prey specificity and growth in light and dark of the plastidic dinoflagellate Karlodinium armiger / Aquat. Microb. Ecol 50:279~288
Boenigk, J / 2001 / The influence of preculture conditions and food quality on the ingestion and digestion process of three species of heterotrophic nanoflagellates / Microb. Ecol 42:168~176
Burkill, P. H / 1993 / Synechococcus and its importance to the microbial foodweb of the northwestern Indian Ocean / Deep Sea Res. II Top. Stud. Oceanogr 40:773~782
Christaki, U / 2002 / Dynamic characteristics of Prochlorococcus and Synechococcus consumption by bacterivorous nanoflagellates / Microb. Ecol 43:341~352
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