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96 22 wet deposition, which strongly impact the marine ecosystem. The heavy metals may restrain the biology from growing due to their toxicity, and the nutrient elements in the rainwater greatly increase the marine primary production in a short time. Based on 55 references, this paper introduces the characteristics of atmospheric dry and wet deposition for nutrient elements and heavy metals, including the concentrations, sources and variation with time and space, and makes a relatively systematic summary and comment on the impact on marine ecosystem by these trace speciesand also discusses somehot spots in this field. Key words: dry deposition; wet deposition; nutrient elements; heavy metal; marine ecosystem ( 88 ) [33] Hunter F M, Birkhead T R. Sperm viability and sperm competition in insects current biology. 2002, 12: 121-123. [34] Bernasconi G, Hellriegel B, Heyland A et al.sperm survival in the female reproductive tract in the fly Scathophaga stercoraria (L.)[J]. Journal of Insect Physiology, 2002, 48: 197-203. (1972 ) 2 Quality and Viability Evaluation of Crustacean Spermatozoa GUAN Weibing, WANG Guizhong, LI Shaojing Department of Oceanography, Xiamen University, Xiamen 361005, Fujian, China Abstract The quality and viability of crustacean spermatozoa is important for reproduction, artifical insemination, spermatozoa cryopreservation, genetic operation in vitro etc. The studies on the viability and quality evaluation of crustacean non-flagellum spermatozoa are reviewed, such as sperm shape and quantity, biostain, Hypo-osmotic swelling test (HOST), biochemical analysis, sperm-egg attachment or fertilization assay,induction of sperm acrosome reaction. The prospects of the research field have also been anticipated. It may act as a reference for the related researches. Key wordscrustacean; spermatozoa; quality and viability; evaluation