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References (12)
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- Publisher
- Wiley
- Copyright
- © 2014, by the Association for the Sciences of Limnology and Oceanography
- ISSN
- 0024-3590
- eISSN
- 1939-5590
- DOI
- 10.4319/lo.1986.31.3.0646
- Publisher site
- See Article on Publisher Site
Abstract
Open ocean chloroplast‐containing chrysomonads have been observed to prey on bacteria. Predominant among these forms are new species of Ochromonas and Chrysamoeba. These algae coexist with nearly identical apochlorotic forms, are abundant in oceanic nanoplankton (averaging 100 cells ml−1), will not grow axenically, can be maintained for extended periods with endogenous bacteria enriched by rice grain culture in the light, and contain bacteria within their food vacuoles. The results demonstrate that protists with and without chloroplasts can occupy overlapping trophic roles and should therefore be studied together. They also challenge recent estimates of nanoflagellate predation on bacteria, as these estimates have assumed that only apochlorotic forms are predatory. If other groups of pelagic nanoflagellates with chloroplasts also prey on bacteria, the transfer of material from bacteria to protists in the open ocean could approach twice previous estimates.
Journal
Limnology and Oceanography – Wiley
Published: May 1, 1986