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The Experimental Ecology Studies On Responses Of Marine Microalgae To UV-B Radiation Enhancement

Posted on:2007-07-17Degree:DoctorType:Dissertation
Country:ChinaCandidate:J WangFull Text:PDF
GTID:1100360185990711Subject:Ecology
Abstract/Summary:PDF Full Text Request
The chlorofluorocarbons (CFCs), CH4 and N2O are increasing with industrialization, and the increasing of these trace gases is expected to deplete the stratospheric ozone layer with a subsequent increase in the amount of solar UV-B radiation reaching the earth. Enhanced UV-B (280nm~320nm) radiation resulting from ozone depletion is one of global environmental problems. Not only marine organisms but also marine ecosystem can be affected by enhanced UV-B radiation. UV-B radiation can significantly damage marine microalgae. The main targets are protein, DNA and photosynthetic pigments, and so on. In this article, we take several species of marine microalgae as experimental objectives to discuss the responsing mechanisms of population ecology and cytology of marine microalgae to enhanced UV-B radiation. The results could supply experimental base to answer the effect of global changes on aquatic ecosystem. we get results as follows by experimental ecology method:1. UV-B radiation treatment inhibited the growth of 8 species of marine microalgae, and the inhibition of growth increased as increasing UV-B radiation dosage. Under the condition of solitary cultivation, the sensitivity of short-term (2d) UV-B radiation on eight species of microalgae was Skeletonema costatum Greville
Keywords/Search Tags:Marine microalgae, Red tide microalgae, UV-B radiation, Enhancement, Population competition, Sensitivity, Cell structure
PDF Full Text Request
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