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Dynamics of Fatty Acids in Common Red-Tide Algaes in the Jiaozhou Bay and Its Application

Author: ZhangLe
Tutor: LiJie;PuXinMing
School: Qingdao Technological University
Course: Environmental Engineering
Keywords: Red tide algae Fatty acid Growing season Zooplankton Gas chromatography - mass spectrometry used in conjunction with (GC / MS)
CLC: X173
Type: Master's thesis
Year: 2010
Downloads: 17
Quote: 0
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Abstract


Deepening impact of global climate change on marine and human triggered increased coastal eutrophication and red tide frequent, leading to the continuing degradation of the living marine resources. According to records, there are over 300 kinds of algae caused by the red tide, which have more than 80 kinds of produce algal toxins. Currently, the majority of studies have focused on the inhibition of red tide algae toxins on marine zooplankton. However, the algae nutrients, fatty acids, especially polyunsaturated fatty acids (PUFA), has an irreplaceable role in the cell membrane, the retina, brain, nerve tissue and synthesis of certain hormones, growth and development of the marine animals plays a vital role. Dominant phytoplankton populations in the red tide in the process of succession and red tide development stage change will lead to changes in important nutrients fatty acids, which have a profound impact on zooplankton and the whole marine animals. This shows that the red tide algae toxins in just cause the biological resources recession. The departure from the nutritional point of view, some of the common red tide species of algae cells indoor visits Jiaozhou Bay fatty acid with its growing season changes, and changes in the law, and the depth of this change impact to the marine zooplankton. In this paper, gas chromatography - mass spectrometry (GC / MS) technology, the Jiaozhou Bay four red tide algae (diatom: Skeletonema costatum, Chaetoceros by Didymus; fatty acid composition of dinoflagellate: Prorocgntrum micans Scrippsiella trochoidea-) characteristics of cells growing season The variation of the analysis of the system, and in the indoor red tide algae (of Skeletonema costatum examine the different growth; Prorocentrum micans) Calanus sinicus (Calanus sinicus). Detection analysis, linear correlation recovery (80.8 ℅ to 106.0 ℅), precision (RSD lt; 3 ℅) and method reproducibility (RSD lt; 9 ℅) data reflect the fatty acid extraction used in this experiment, The purification and analytical methods are reliable and high degree of accuracy. View only from the analysis of 18 kinds of fatty acids: saturated fatty acids, diatoms, C14: 0, C16: 0 based, multi-unsaturated fatty acid C18: 2ω6, C20: 5ω3, containing a small amount of C22: 6ω3; dinoflagellates saturated fatty acid C16: 0, C18: 0 and more saturated fatty acids C18: 2ω6, C18: 3ω6, C22: 6ω3; which diatoms C16: 1ω7/C16: 0 ratio Bijia algae is higher and more . The approximate variation of fatty acids in the algal cells growing season: from the algal cells to adapt to, the content is gradually increased to a maximum in the stationary phase, entering the decline phase, the amount began to reduce. In addition, studies show that: the number of the red tide algae its contain more fatty acids, enables the Calanus sinicus maintain a certain rate of spawning, however, the decline and fall of the red tide algae termination of the Calanus sinicus spawning the trend. Either in log phase or decline phase, dinoflagellates ocean Prorocentrum (Prorocentrum micans) because of its rich in fatty acids, especially polyunsaturated fatty acids (PUFA) than diatoms (Skeletonema costatum) Skeletonema costatum more in is conducive to the Calanus sinicus the spawning.

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