GRAZING RATE AND PARTICLE SIZE SELECTION BY THE CHOANOFLAGELLATE DIAPHANOECA GRANDIS FROM THE SEA-ICE OF LAGOON SAROMA KO, HOKKAIDO
Abstract: Diciphwweca grundis, a loricate choanoflagellate, is an abundant microheterotroph in many localities, including Antarctica. Little is known of its feeding selectivity or ingestion rates. In order to investigate the role of choanoflagel-lates in ice-covered marine environments, the grazing...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.483.829 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1990-Marchant.pdf |
| Summary: | Abstract: Diciphwweca grundis, a loricate choanoflagellate, is an abundant microheterotroph in many localities, including Antarctica. Little is known of its feeding selectivity or ingestion rates. In order to investigate the role of choanoflagel-lates in ice-covered marine environments, the grazing rates and particle size selection by D. grandis from the bottom-ice community of lagoon Saroma KO were measured using fluorescent latex microspheres (FML Maximum uptake rate was around 2 FM-cell-1-h-l and maximum clearance rate was 0. 7 n l ~ ~ e l l- ~ ~ h- ~. D. pundis was not able to ingest microspheres larger than 1 pm. These data are discussed in relation to their abundance, grazing rates by other protozoa and food availability in under-ice environments. 1. |
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