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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/44185

Title: 東海海域著鞭毛蟲(Haptophyta)數量分佈及其攝食速率之研究
The spatial variation of Haptophyta abundance and its grazing rate on bacterial in East China Sea
Authors: Sung, Pei-Ting
宋沛庭
Contributors: 國立臺灣海洋大學:海洋環境與生態研究所
Keywords: 混營性微細鞭毛蟲;著鞭毛蟲;攝食速率;細菌;營養鹽
MNF;haptophyta;ingestion rate;bacteria;nutrient
Date: 2015
Issue Date: 2017-11-15T08:45:41Z
Abstract: 本研究以著鞭毛蟲為研究對象,利用螢光原位雜合法(Tyramide Signal Amplification-Fluorescence in situ Hybridization, TSA-FISH)調查在夏季東海海域受到長江沖淡水注入後,其數量分布及攝食細菌與環境因子的關係。 本研究使用海研五號於2014年七月進行研究(OR5-0042)。著鞭毛蟲在長江沖淡水出海口測站(Sts. 19及19A)表層數量明顯較低(98及91 cells mL-1)。而在其他測站著鞭毛蟲表層數量平均約為400 cells mL-1。另外在測站22表層水有最高值,數量達到2739 cells mL-1。著鞭毛蟲在東海海域整體平均攝食細菌速率為17.34 Bac Hap-1 h-1,而在貧營養鹽的台灣暖流水水團,著鞭毛蟲的個體攝食速率會與細菌濃度呈現正相關(p<0.05)。另外,在貧營養鹽(NO3<1 μM)中,經過檢定過後,著鞭毛蟲的個體攝食速率與餌料濃度呈正相關(p<0.05),證實在貧營養環境混營性鞭毛蟲攝食之目的可能是為了獲取營養鹽。將著鞭毛蟲分成三個體型大小(ESD):<3 μm、3~5 μm與>5 μm來看,中型(3~5 μm) 著鞭毛藻為主要攝食群(75%)。 在有光層表層與底層的兩個環境中,除了黃海混合水水團外,著鞭毛蟲個體攝食速率並沒有差異。而在黃海混合水水團底層,大型(>5 μm)的著鞭毛蟲比例較高,使得量測到的攝食速率較高。另外,在黑潮水水團中,著鞭毛蟲的數量79 cells mL-1,攝食速率平均為24 Bac Hap-1 h-1。
In this study, we used Tyramide Signal Amplification-Fluorescence in situ Hybridization (TSA-FISH) to investigate the distribution, abundance and effects of environmental factors on ingestion rate on bacteria of the Haptophyta in the East China Sea after Changjiang Diluted Water flooding. Samples were collected from onboard RV ‘Ocean Researcher V’ (cruise OR5-0042) in July 2014. Abundance of Haptophyta in the surface water of Changjiang Diluted Water (CDW) in the estuary (Sts. 19 and 19A) was significantly low (98 and 91 cells mL-1), but in surface water of other stations was 400 cells mL-1, and reached a peak at the St. 22 with 2739 cells mL-1. Average ingestion rate of Haptophyta on bacteria in the East China Sea is 17.34 Bac Hap-1 h-1. In the oligotrophic Taiwan Current Warm Water (TCWW), this ingestion rate was positively correlated with bacterial abundance (p<0.05). In addition, the ingestion rates was positively correlated (p<0.05) with food concentration in the oligotrophic water (NO3<1 μM), consequently we believed that mixotrophic nanoflagellates rely on grazing to obtain nutrients in the oligotrophic environment. . We classified the Haptophyta in three size groups, ESD: < 3 μm, 3~5 μm, and > 5 μm, with the medium size group (ESD 3~5 μm) being the dominant (75 %). Except the Yellow Sea Mixing Water(YSMW), there was no significant difference in ingestion rates of mixotrophic nanoflagellates between surface (SE) and bottom (BE) eutrophic zones. In the Yellow Sea Mixing Water, haptophytes were dominant by the large size group (>5 μm), therefore, higher ingestion rate on bacteria. In the Kuroshio Water, the mean abundance was 79 cells mL-1, and the mean ingestion rate was 24 Bac Hap-1 h-1 for the haptophyta..
URI: http://ethesys.lib.ntou.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=G0010383006.id
http://ntour.ntou.edu.tw:8080/ir/handle/987654321/44185
Appears in Collections:[海洋環境與生態研究所] 博碩士論文

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