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Çϱ¸¿ª¿¡¼ÀÇ ¹Ì»ý¹° »ýÅÂ/»ýÁöÈÇבּ¸(Microbial biogeochemistry in estuaries)
- Çϱ¸¿ªÀº ´ã¼ö¿Í Çؼö°¡ ¸¸³ª ±â¼ö¿ªÀ» Çü¼ºÇÏ´Â Áö¿ªÀ¸·Î Àüü ÇØ¾ç ¸éÀûÀÇ ¾à 0.4%¿¡ Áö³ªÁö ¾ÊÁö¸¸, ´ÜÀ§ ¸éÀû´ç »ý»ê·ÂÀº ¾à 1000 g C m-2 y-1·Î Çؾ翡¼ °¡Àå ³ôÀº Áö¿ªÀÌ´Ù. ¿ì¸®³ª¶óÀÇ °æ¿ì ÀüüÇϱ¸ 463°³ Áß 49%¿¡ ´ÞÇÏ´Â Çϱ¸(228°³)°¡ ÀÎÀ§ÀûÀÎ °³¹ß·Î ÀÇÇØ Çϱ¸¼øȯÀÌ Â÷´ÜµÇ¾úÀ¸¸ç, Çϱ¸°³¹ß·Î ÀÎÇÑ È¯°æÈѼÕÀº °è¼ÓÀûÀ¸·Î Áõ°¡ÇÏ°í ÀÖ´Ù. º» ¿¬±¸½Ç¿¡¼´Â Çϱ¸¿ªÀÇ È¯°æº¯È Æò°¡, ȯ°æ°³¼± ¹× È¿À²ÀûÀÎ °ü¸®¸¦ À§ÇØ »ý»ê-ÅðÀû-ºÐÇØ°úÁ¤À» Æ÷ÇÔÇÑ »ýÁöÈÇÐÀû ¹°Áú¼øȯ ¿¬±¸¸¦ ¼öÇàÇÏ°í ÀÖ´Ù.
[¹®ÀÇ: ±è¼ºÇÑ (shkim1778@hanyang.ac.kr); ¾È¼º¿í(asuppl@hanyang.ac.kr)]
[¿¬±¸»ç·Ê 1: ¿µ»ê° Çϱ¸¿ª ÅðÀû¹°¿¡¼ÀÇ È²»ê¿°È¯¿ø·Â ¹× ÁöÈÇÐ °ø±Ø¼ö Ư¼º]
Fig. 1. Sampling stations in the Yeongsan River estuary and pictures showing the sediment color at each station. The sediment color at YE1 appeared to be black and dark brown, whereas at YE2 and YE3, the sediment showed a gray color, a typical color of muddy coastal sediment
Fig. 2. The high SRRs in the surface sediment at YE1 was characterized by extremely high concentrations of NH4+, PO43- and HS-
- ¿µ»ê° Çϱ¸µÏ ÁÖº¯ºÎ(YE1)¿¡¼´Â ÇؼöÀÇ À¯¼ÓÀÌ ´À·ÁÁ® ºÎÀ¯¼º ÀÔÀÚ¹°ÁúÀÌ Ä§ÀüµÇ°í, ÀÌ·Î ÀÎÇØ Åõ¸íµµ°¡ Áõ°¡ÇÏ¿© ½Ä¹°ÇöûÅ©ÅæÀÌ ´ë Áõ½ÄÇÏ°Ô µÈ´Ù. Çϱ¸µÏ ÁÖº¯ºÎ¿¡¼ À¯±â¹°(ºÎÀ¯¼º ÀÔÀÚ¹°Áú°ú ½Ä¹°ÇöûÅ©Åæ)ÀÇ ÅðÀûÀº ÅðÀû¹° ³» Çø±â¼º À¯±â¹° ºÐÇØ(ƯÈ÷, Ȳ»ê¿° ȯ¿ø·Â)¸¦ Áõ°¡½ÃÄ×À¸¸ç, ±×·Î ÀÎÇØ, À¯±â¹° ºÐÇػ깰ÀÎ NH4+, PO43- and HS- µîÀÇ ³óµµ°¡ °ø±Ø¼ö ³»¿¡ ±Ø´ÜÀûÀ¸·Î ³ô°Ô ³ªÅ¸³µ´Ù.
[¹®ÀÇ: ±è¼ºÇÑ(shkim1778@hanyang.ac.kr)]
[¿¬±¸»ç·Ê 2: ¿µ»ê° Çϱ¸¿ªÀÇ ÀÎÀÇ »ýÁöÈÇÐ]
- ¿µ»ê°À¸·Î À¯ÀÔµÈ ÀÎÀÇ ´ëºÎºÐÀº ö°ú °áÇյǾî ÀÖÀ¸¸ç, Çø±â¼ºÁ¶°Ç¿¡¼ Ȳ»ê¿° ȯ¿øÀ¸·Î ºÎÅÍ ³ª¿Â Ȳȼö¼Ò´Â ö°ú °áÇÕÇÑ È²ÈÇÕ¹°(FeS; FeS2)À» Çü¼ºÇÏ°í À̴ ö°ú °áÇÕµÈ ÀÎÀ» ¿ëÃâ½ÃŲ´Ù (Fig. 3). ÀÌ´Â Çϱ¸µÏÀ» ±âÁØÀ¸·Î Ȳ»ê¿°ÀÌ Á¦ÇÑµÈ ´ã¼öÁö¿ª¿¡¼´Â ÀÎÀÇ Ä§ÀüÀ» Ȳ»ê¿°ÀÌ Ç³ºÎÇÑ Çϱ¸¿ª¿¡¼´Â ¼öÃþÀÇ ºÎ¿µ¾çȸ¦ ¹ß»ý½ÃÅ°´Â ÀÎÀÇ ¿ëÃâÀ» ¾ß±â½Ãų ¼ö ÀÖ´Ù.
- µû¶ó¼, Çϱ¸¿ªÅðÀû¹°ÀÇ Ã¶-Ȳ-ÀÎÀÇ »ýÁöÈÇÐÀûÀÎ ¼øȯ¿¡ ¹ÌÄ¡´Â ¿µÇâ¿¡ ´ëÇÑ ¿¬±¸´Â ¸Å¿ì Áß¿äÇÏ´Ù.
[¹®ÀÇ: ¾È¼º¿í(asuppl@hanyang.ac.kr)]
Fig. 3. Schematic presentation of iron (Fe), sulfur (S) and phosphorus (P) cycling in a sulfate-poor freshwater and -rich estuarine environment (left, redrawn from Jouni Lehtoranta et al. 2005). Thick arrows indicate the major processes in environment. In the sulfate-rich estuarine sediment, sulfide formed by sulfate reduction can precipitates with Fe(II) leading to pyrite (FeS2) formation preventing it from diffusing to aerobic layers where it might otherwise re-oxidize and regenerate Fe-P, thereby releasing more P into the overlying water (right).