碩士 / 國立臺灣海洋大學 / 海洋環境化學與生態研究所 / 98 / On board incubation of phytoplankton photosynthetic-irradiance curves (PB-E curve) and their relation to environmental conditions in the East China Sea were studied. Data discussed in this study were collected from January and July 2008 cruises and used to represent winter and summer condition, respectively. PB-E curve is described by two key parameters, light saturated photosynthetic efficiency ( ) and the initial slope (). In winter, depths of euphotic layer among stations were shallower than mixed layer depth. PB-E curves showed little depth variation in mixed layer and little spatial variation among stations because of low incident light and strong vertical mixing. The mean values of and within the mixed layer were 2.80.6 gC gChl-1 hr-1、0.0090.002 gC gChl-1 hr-1 (E m-2 s-1)-1, respectively. Without any relation was found between and and hydrographic and nutrients conditions. In summer, depths of euphotic layer among stations were much deeper than mixed layer depth because of strong summer stratification. Although the values of and showed very high depth and spatial variation, and in the mixed layer were higher than those below mixed layer in general. The mean value of and in the mixed layer was 11.17.1 gC gChl-1 hr-1, 0.0120.006 gC gChl-1 hr-1 (E m-2 s-1)-1, respectively. The mean value of and at depth between the bottom of mixed layer and euphotic depth was 5.63.8 gC gChl-1 hr-1, 0.0090.006 gC gChl-1 hr-1 (E m-2 s-1)-1. Most of the higher values of and were observed in higher temperature, salinity and light transmission but nutrient-depleted waters. Higher percentage of picoplankton composition in such oligotrophic water might be the reason for higher value of . The mean value of in summer was significant higher than the value in winter might be resulted from higher available incident light and strong stratification in summer season.
| Identifer | oai:union.ndltd.org:TW/098NTOU5282044 |
| Date | January 2010 |
| Creators | Feng-I Wu, 吳鳳儀 |
| 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 | 105 |
Page generated in 0.0023 seconds