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Çѱ¹È¯°æ»ý¹°ÇÐȸ / v.20, no.2, 2002³â, pp.136-145
Ag°ú Cu·Î ¿À¿°µÈ ÅðÀû¹°ÀÌ ÀÌ¸ÅÆÐ·ù Macoma balthicaÀÇ Ã¼³» ±Ý¼ÓÃàÀû°ú ¸¸¼ºµ¶¼º¿¡ ¹ÌÄ¡´Â ¿µÇâ
( Influence of Ag and Cu Contaminated Sediments on the Bioaccumulation and Chronic Toxicity to the Clam Macoma balthica )
À¯ÈÆ;ÀÌÀÎÅÂ;À̺´±Ç; Àü³²´ëÇб³ ÇØ¾çÇаú;Àü³²´ëÇб³ ÇØ¾çÇаú;Àü³²´ëÇб³ ÇØ¾çÇаú;
 
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Ag¿Í Cu·Î ¿À¿°µÈ ÅðÀû¹°ÀÌ ÀÌ¸ÅÆÐ·ù Macoma balthica¿¡ ¹ÌÄ¡´Â ¸¸¼ºµ¶¼º¿µÇâ°ú ÁÖ¿äÇÑ Áß±Ý¼Ó Èí¼ö°æ·Î¸¦ Æò°¡Çϱâ À§ÇØ, ½ÇÇè½Ç¿¡¼­ ¹Ì¼Ò»ýÅÂ°è ½ÇÇèÀÌ ¼öÇàµÇ¾ú´Ù. ½ÇÇè»ý¹°ÀÎ M. balthica´Â 4°³ÀÇ ³óµµ±¸¹è¸¦ °®´Â $Ag(0.01-0.87mu{mol};g^{-1})$¿Í $Cu(0.75-5.55mu{mol;g^{-1})$·Î ¿À¿°µÈ ÅðÀû¹°¿¡¼­ 90ÀÏ µ¿¾È ¹è¾çµÇ¾ú´Ù. ÅðÀû¹° ³» Á߱ݼÓÀÇ ÁöÈ­ÇÐÀû ºÐÆ÷ Ư¼º°ú »ý¹°À̿뵵¸¦ Á¶ÀýÇÑ´Ù°í ¾Ë·ÁÁø AVS(acid volatile sulfide)ÀÇ ³óµµ¸¦ º¯È­½ÃÄÑ, AVS°¡ M. balthicaÀÇ Ag¿Í CuÀÇ Ã¼³»ÃàÀû¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡ÇÏ¿´´Ù. 90Àϰ£ ³ëÃâµÈ ÈÄ, M. balthica°¡ ÃàÀûÇÑ Ag¿Í CuÀÇ ³óµµ´Â 1 N HCI·Î ÃßÃâµÈ ÅðÀû¹° ³» Á߱ݼÓÀÇ ³óµµ(SEM, simultaneously extracted metal)¿Í ¾çÀÇ »ó°ü¼ºÀ» º¸À̸ç Áõ°¡ÇÏ¿´´Ù. Ag¿Í CuÀÇ Ã¼³» ÃàÀûÀº [SEM]-[AVS]°ª¿¡ Å« ¿µÇâÀ» ¹ÞÁö ¾Ê¾Ò´Âµ¥, À̰ÍÀº °ø±Ø¼ö ³» ¿ëÁ¸Å·ΠÁ¸ÀçÇÏ´Â Ag¿Í Cu°¡ »ý¹° ü³» ÃàÀû¿¡ Å©°Ô ±â¿©ÇÏÁö ¾Ê¾Ò´Ù´Â °ÍÀ» ¾Ï½ÃÇÑ´Ù. ü³» ÃàÀûµÈ Ag¿Í Cu´Â M. balthicaÀÇ ¿©¼öÀ²°ú ±Û¸®ÄÚ°Õ ÇÔ·®¿¡ Á÷Á¢ÀûÀÎ ¿µÇâÀ» ¹ÌÃÆ´Ù. ÃÖ´ë $1.0pm{0.2}mu{mol};Ag;g^{-1}$¿Í $2.7pm{0.3}mu{mol};Cu;g^{-1}$¸¦ ÃàÀûÇÑ M. balthicaÀÇ ¿©¼öÀ²Àº ¿À¿°µÇÁö ¾ÊÀº ÅðÀû¹°¿¡ ³ëÃâµÈ ½ÇÇèÁ¶°³ÀÇ 18-43%¿¡ ºÒ°úÇÏ¿´´Ù. ÀÌ¿Í À¯»çÇϰÔ, Áß±Ý¼Ó Ã³¸®±º¿¡ ³ëÃâµÈ M. balthicaÀÇ ±Û¸®ÄÚ°Õ ÇÔ·®Àº ü³» Ag¿Í CuÀÇ ³óµµ¿Í À½ÀÇ »ó°ü¼ºÀ» ³ªÅ¸³»¾ú´Ù. º» ¿¬±¸ÀÇ °á°ú´Â Ag¿Í Cu·Î ¿À¿°µÈ ÅðÀû¹°¿¡ ³ëÃâµÈ M. balthica´Â ÁÖ·Î ÅðÀû¹°ÀÇ ¼·½ÄÀ» ÅëÇØ Á߱ݼÓÀ» ÃàÀûÇϸç, ¿©¼öÀ²°ú ±Û¸®ÄÚ°Õ ÇÔ·®ÀÇ °¨¼Ò¿Í °°Àº ¸¸¼ºµ¶¼º¿µÇâÀ» ³ªÅ¸³¾ ¼ö ÀÖ´Ù´Â °ÍÀ» ¾Ï½ÃÇÑ´Ù.
A laboratory microcosm experiment was conducted to evaluate a major metal uptake route as well as chronic toxic effects of the clam, Macoma balthica exposed to Ag and Cu contaminated sediments. Twenty five clams were exposed to the sediments contaminated with four levels of Ag $Ag(0.01-0.87mu{mol};g^{-1})$ and $Cu(0.75-5.55mu{mol;g^{-1})$ for 90 days. AVS (acid volatile sulfide) concentration in the sediments, considered as major factor controlling metal geochemistry and bioavailability, was manipulated to evaluate its effects on Ag and Cu bioaccumulation in M. balthica. Following 90-d exposure, the tissue Ag and Cu in M. balthica increased linearly with the Ag and Cu concentrations in sediments extracted with 1 N HCI (SEM, simultaneously extracted metals with AVS). The bioaccumulation of Ag and Cu in M. balthica was little influenced by difference in [SEM] - [AVS] values, suggesting a minor contribution of pore water metals to bioaccumulation. Tissue Ag and Cu concentrations directly influenced on the clearance rate and glycogen content of the clams. The clams with highest tissue Ag $(1.0pm{0.2}mu{mol};g^{-1})$ and Cu concentrations $(2.7pm{0.3};mu{mol};g^{-1})$ had only 18-43% of clearance of the clams exposed to uncontaminated sediments. Similarly, glycogen content of the exposed clams had a inverse relationship with tissue Ag and Cu concentrations. These results suggest that M. balthica exposed to Ag and Cu contaminated sediments accumulates metals largely by ingestion of contaminated sediments and can display chronic effects as reduced clearance rate and glycogen content.
 
Ű¿öµå
Macoma balthica;metal;Ag;Cu;AVS;clearance rate;glycogen;chronic toxicity;
 
ȯ°æ»ý¹° / v.20, no.2, 2002³â, pp.136-145
Çѱ¹È¯°æ»ý¹°ÇÐȸ
ISSN : 1226-9999
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921492604)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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