Trace element concentrations in size-fractionated marine planktons
Date Issued
2014
Date
2014
Author(s)
Chen, Yu-Heng
Abstract
In this study, size fractionated planktons (i.e., 0.4-10μm, 10-63μm, 63-153μm, >153μm, 363-500μm, 500-1000μm, 1000-2000μm, 2000-2cm, 2-4cm, >4cm) were collected at three oceanic environments, locations at a up-welling region and a volcanic activity region of Southern East China Sea, and oligotrophic Western Philippine Sea by ultraclean techniques. Samples were further analyzed for their elemental (C, N, S and P) and trace metal (Fe, Zn, Cu, Ni and Cd) content. The results revealed that the composition of structural elements (C, N, S and P) remain almost at constant proportions, but trace elements (Fe, Zn, Cu, Ni and Cd) are significantly different at various body sizes and species. It was also found that physiological difference between Calanoida and Cyclopoida had no effect on their trace metal content (except Cu), but higher content was discovered in Ostracoda, mainly due to its feeding strategy and metabolism rate. In addition, trace metal concentration in Eucarida show dramatic changes with increasing body size, mainly due to the effect of growth dilution and metabolism requirement. It appeared that trace elements in zooplankton are mainly controlled by physiological characteristics, less affected by environmental conditions.
Subjects
浮游生物
微量元素
SDGs
Type
thesis
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