碩士 / 國立臺灣海洋大學 / 海洋環境化學與生態研究所 / 101 / South China Sea is one of the seas with significant internal waves. To explore the effects of internal waves (IWs) on bacterial production (BP) bacterial biomass (BB) and bacterial turn-over rate (Bµ=BP/BB), a total of nine anchored studies were conducted during the period of 2009~2012 in areas with different physical set-ups. Namely, the areas subjected to elevation IWs (6 cases), depression IWs (1 case) and weak or no IWs (2 cases). The latter two areas served as the control sites. The results indicated that the minimal readings of BP (~1.0 mgC m-3 d-1) and Bµ (~0.1 d-1) at all sites were similar. With one exception, the maximal readings of depth-averaged BP (6.2~12.2 mgC m-3 d-1) and Bµ (0.55~11.3 d-1) of the elevation IWs areas were at least 4-folds higher than those of the control sites (BP 1.7~2.1 mgC m-3 d-1; Bµ 0.13~0.24 d-1). The limiting inorganic nutrients brought up to the upper-water column by the elevation IWs might be one of the causes for higher bacterial rate parameters within the euphotic zone. Replicate survey conducted at the north-west of Dong-Sha atoll (the elevation wave-wave interaction zone) during neap and spring tide periods showed great contrast. Variations and the averages of BP and Bµ recorded in the neap tide study was similar to the control sites, while those of the spring tide study were similar to the elevation IWs sites. This implies that the amplitude of the elevation IWs, and thus biological activities could be affected by the fortnightly cycle. In contrast, there seemed to be no difference between the averaged BB of the control (8.4~13.7 mgC m-3) and the elevated IWs (9.3~10.6 mgC m-3). Our moored buoy data indicated the IWs occurred mostly during the high tide period. However, in the elevation IWs areas, only half of the Bµ(and BP) peaks occurred during high tide period. The reason for the differential diel Bµ expression is unknown. Nevertheless, our results explicitly suggest that a snap-shot sampling of bacterial production in the areas affected by elevation IWs could be misleading. This research by far might be the first one revealing the potential effects of elevation IWs on bacterial activities in the world.
| Identifer | oai:union.ndltd.org:TW/101NTOU5282001 |
| Date | January 2013 |
| Creators | Cheng-Kai Liao, 廖晟凱 |
| Contributors | Fuh-Kwo Shiah, 夏復國 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 52 |
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