碩士 / 國立臺灣海洋大學 / 海洋環境化學與生態研究所 / 100 / Two summer cruises across the Kuroshio east off Taiwan on September 2009 and July 2011 were investigated. Hydrography, nutrients, chlorophyll and primary productivity data observed from the cruises were used to study the spatial and temporal variation of phytoplankton chlorophyll and primary production and their variability with water stratification. Higher chlorophyll and primary production were found at station near the coast due to the effect of Kuroshio upwelling along the coast. In addition, very high chlorophyll and primary production was found on September 2009 cruise at station located in the center of the Kuroshio main stream due to the uplifting of the nutricline. Exclude these hot spot, spatial averaged of chlorophyll inventory above 100 m for the two cruises showed no difference and the value were 31.0±6.4 and 33.9±6.3 mgChl m-2, respectively. Spatial averaged of primary production for the September 2009 cruise (399±50 mgC m-2 d-1) was much higher than the July 2011 cruise (193±23 mgC m-2 d-1). Higher specific primary productivity on September 2009 cruise than July 2011 cruise was because of the difference of phytoplankton species composition. Picoplankton was dominated on September cruise, but only less 12% picoplankton appeared on July cruise. The effect of summer stratification on nutrient availability and primary production was opposed to the previous study. Nutricline depth was negative correlated with the intensity of stratification. Chlorophyll inventory and primary production were positively correlated with the magnitude of stratification. Because the intensity of stratification was induced by isotherm uplift due to the coastal upwelling on the west side of the Kuroshio.
| Identifer | oai:union.ndltd.org:TW/100NTOU5282002 |
| Date | January 2012 |
| Creators | Pei-Ju Shen, 沈佩儒 |
| Contributors | Gwo-Ching Gong, 龔國慶 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 90 |
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