• Animal Systematics, Evolution and Diversity
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• 제22권2호
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• pp.217-221
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• 2006

Two marine planktonic ciliates are investigated by using protargol impregnated techniques. These are Rimostrombidium orientale Song and Bradbury, 1998 and R. veniliae Montagnes and Taylor, 1994. Both species are new to Korean waters.

• 생태와환경
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• 제37권2호통권107호
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• pp.149-179
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• 2004

국내산 담수 섬모충 플랑크톤의 분류 및 생태학적 특성을 파악하기 위해 2000년 12월 15일부터 2001년 12월6일까지 팔당호에서 표층수를 채집하였다. 조사결과 총 6목 7과 10속 12종의 우점종이 분류, 동정 되었으며 이들은 모두 국내 미기록 종으로서 생태학적 특성과 함께 기재하였다. 우점적으로 동정된 섬모충 플랑크톤의 대부분은 부영양수역에서 보고된 종들이었으며, 저수온기인 동계와 춘계에는 nanoplankton을 먹이로 하는 비교적 대형종인 Codonella cratera, Rimostrombidium lacustris, Strobilidium caudatum, Limnostrombidium viride, Pelagostrombidium fallax, Stylonychia sp., Pseudostrombidium planktonticum, Phascolodon vorticella등이 출현하는 반면, 고수온기인 하계와 추계에는 박테리아를 먹이로 하는 Rimostrombidium hyalinum, Rimostrombidium brachykinetum, Halteria gradinella, Vorticella convallaria와 같은 소형종들이 우점하였다.

• Animal Systematics, Evolution and Diversity
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• 제27권2호
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• pp.131-141
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• 2011

For the purpose of taxonomical description of marine oligotrich ciliates, water samples were collected from the southern coast of Korea (Masan Bay and Jangmok Bay). Ciliate cells were identified based on protargol impregnated specimens. As a result, four oligotrich ciliates were identified and redescribed: Rimostrombidium conicum (Kahl, 1932), Omegastrombidium kahli Song et al., 2009 and Spirotontonia turbinata (Song and Bradbury, 1998), and Spirotontonia grandis (Suzuki and Han, 2000). Of them, R. conicum, O. kahli, and S. turbinata are newly recorded and S. grandis is recorded for the second time in Korea, while the last one is redescribed to compare its variations according to locality. In addition, their abundances were analyzed and discussed the changes in accordance with water temperature and salinity.

• 생태와환경
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• 제41권1호
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• pp.11-18
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• 2008

국내산 담수 섬모충 플랑크톤의 종조성과 계절적 변화를 조사하기 위하여 2000년 12월 15일부터 2001년 12월 6일까지 팔당호에서 표층수를 채집하였다. 출현한 분류군 중 소모류(Oligotrichs)가 53%로 출현 양이 가장 많았다. 상대적으로 높은 개체수를 보인 봄인 3월 30일($1.9\times10^4$ cells $L^{-1}$)과 4월 6일($1.85\times10^4$ cells $L^{-1}$),여름인 6월 8일($1.7\times10^4$ cells $L^{-1}$)과 7월 20일($1.9\times10^4$ cells $L^{-1}$)에 급증하였다. 우점적으로 출현한 종들은 뚜렷한 계절성을 나타내어 겨울과 봄인 저수온기에는 세포크기가 비교적 큰$(>50{\mu}m)$ Stylonychia sp1, Phascolodon vorticella, Codonella cratera가 출현하였으며 여름과 가을인 고수온기에는 세포크기가 작은$(<30{\mu}m)$ Vorticella spp., Rimostrombidium hyalinum, Halteria grandinella가 출현하였다. 세포크기가 큰 종들은 Chl-${\alpha}$와 상관성을(r=0.33, p<0.05, n=39) 나타낸 반면, 소형종인 Halteria grandinella는 bacteria와 상관성을(r=0.35, p<0.05, n=39) 나타내었다.

• Ocean and Polar Research
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• 제30권4호
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• pp.419-426
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• 2008

Ciliate plankton samples were collected biweekly from July 2006 to June 2008 in Jangmok Bay of Geoje Island. Species composition and abundances were analyzed by quantitative protargol stain and environmental parameters were also examined. A total of 88 ciliate species occurred during the study period, consisting of 22 tintinnids, 51 oligotrichs, and 15 other species. Higher ciliate abundances appeared from June to October during the warm season ($<20^{\circ}C$) and the maximum ($4.0{\times}10^4\;cells\;L^1$) in August, while the lower abundances were found during the cold season. The minimun ciliate abundance was found in November when water temperature rapidly decreased. The temporal succession of dominant species was very clear and opportunistic. Pelagostrombidium sp., Tontonia simplicidens, Helicostomella subulata, and Myrionecta rubra were co-dominant in summer while Rimostrombidium orientale occurred abundantly in winter. Strombidium tressum and S. compressum, eurythermal species, were observed during all seasons. Based on the species-specific ecology of ciliate plankton, it is suggested that the indicative ciliate species can be applied as a biological tool to detect environmental change in the southern coastal waters of korea.

• ALGAE
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• 제36권1호
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• pp.25-36
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• 2021

The mixotrophic dinoflagellate Tripos furca causes red tides in the waters of many countries. To understand its population dynamics, mortality due to predation as well as growth rate should be assessed. Prior to the present study, the heterotrophic dinoflagellates Noctiluca scintillans, Polykrikos kofoidii, Protoperidinium steinii, and mixotrophic dinoflagellate Fragilidium subglobosum were known to ingest T. furca. However, if other common heterotrophic protists are able to feed on T. furca has not been tested. We explored interactions between T. furca and nine heterotrophic dinoflagellates and one naked ciliate. Furthermore, we investigated the abundance of T. furca and common heterotrophic protists in coastal-offshore waters off Yeosu, southern Korea, on Jul 31, 2020, during its red tide. Among the tested heterotrophic protists, the heterotrophic dinoflagellates Aduncodinium glandula, Luciella masanensis, and Pfiesteria piscicida were able to feed on T. furca. However, the heterotrophic dinoflagellates Gyrodiniellum shiwhaense, Gyrodinium dominans, Gyrodinium jinhaense, Gyrodinium moestrupii, Oblea rotunda, Oxyrrhis marina, and the naked ciliate Rimostrombidium sp. were unable to feed on it. However, T. furca did not support the growth of A. glandula, L. masanensis, or P. piscicida. Red tides dominated by T. furca prevailed in the South Sea of Korea from Jun 30 to Sep 5, 2020. The maximum abundance of heterotrophic dinoflagellates in the waters off Yeosu on Jul 31, 2020, was as low as 5.0 cells mL-1, and A. glandula, L. masanensis, and P. piscicida were not detected. Furthermore, the abundances of the known predators F. subglobosum, N. scintillans, P. kofoidii, and Protoperidinium spp. were very low or negligible. Therefore, no or low abundance of effective predators might be partially responsible for the long duration of the T. furca red tides in the South Sea of Korea in 2020.