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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.40, no.3, 2007³â, pp.395-402
ÇѰ­ ÇÏ·ù¿¡¼­ ȯ°æ¿äÀÎÀÇ º¯µ¿°ú ½Ä¹°ÇöûũſÀÇ ±ºÁý µ¿ÅÂ
( Fluctuation of Environmental Factors and Dynamics of Phytoplankton Communities in Lower Part of the Han River )
¼­¹Ì¿¬;±è¹éÈ£;¹è°æ¼®; ¼­¿ï½Ã º¸°Çȯ°æ¿¬±¸¿ø ¼öȯ°æ»ýÅÂÆÀ;ÇѾç´ëÇб³ »ý¸í°úÇаú;¼­¿ï½Ã º¸°Çȯ°æ¿¬±¸¿ø ¼öȯ°æ»ýÅÂÆÀ;
 
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ÇѰ­ÇÏ·ù¿¡¼­ ȯ°æ¿äÀο¡ µû¸¥ ½Ä¹°ÇöûũſÀÇ º¯È­¸¦ Á¶»çÇϱâ À§ÇÏ¿© 2006³â 1¿ùºÎÅÍ 12¿ù±îÁö ÃÑ 35ȸ ä¼öÇÏ¿©, ºÐ¼®ÇÏ°í µ¿Á¤ÇÑ °á°ú ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù. ȯ°æ¿äÀÎÀÇ º¯È­¿¡¼­´Â ¸ðµç Ç׸ñ¿¡¼­ ÁöÁ¡°£¿¡ Å« Â÷À̰¡ ¾ø´Â °ÍÀ¸·Î Á¶»çµÆÀ¸³ª, BOD¿Í TN, TPµî¿¡¼­ St. 2ÁöÁ¡ÀÌ ³ôÀº ³óµµ¸¦ ³ªÅ¸³ÂÀ¸¸ç ÁýÁß °­¿ì°¡ ÀÖ¾ú´ø ½Ã±â¿¡ ºñ±³Àû ³·Àº ³óµµ ºÐÆ÷¸¦ ³ªÅ¸³Â´Ù. ½Ä¹°ÇöûũſÀº ÃÑ 88Á¾ÀÌ ÃâÇöÇÏ¿´À¸¸ç, ÇöÁ¸·®Àº $1{sim}41$,104 cells $mL^{-1}$ ¹üÀ§·Î½á °èÀý°ú Á¶·ùÁ¾¿¡ µû¶ó º¯µ¿ÀÌ Å« °ÍÀ¸·Î ³ªÅ¸³µ´Ù. °­º°·Î´Â ³²Á¶·ù, ±ÔÁ¶·ù, ³ìÁ¶·ù°¡ ¼­·Î ´Ù¸¥ °æÇâÀ» ³ªÅ¸³Â´Âµ¥, ³²Á¶·ù´Â ¿©¸§¿¡¼­ °¡À»·Î Á¢¾îµå´Â ½Ã±â¿¡(5¿ù${sim}$9¿ù) ÇöÁ¸·®ÀÌ ³·Àº ¹Ý¸é,³ìÁ¶·ù¿Í ±ÔÁ¶·ùÀÇ ÃâÇöÀÌ ¿ì¼¼ÇÏ¿´°í, ƯÈ÷ ±ÔÁ¶·ù Áß Cyclotella sp.´Â ÁÖ·Î º½Ã¶¿¡, Aulacoseira granulata´Â °¡À»Ã¶¿¡ ÁÖ¿ä ¿ìÁ¡Á¾À¸·Î ÃâÇöÇϸ鼭 ÇÏÀý±âÀÎ 6¿ùÀ» ±âÁ¡À¸·Î Á¾ õÀ̰¡ ÀϾ´Ù. °­¿ì±â¿¡ ÇöÀúÇÏ°Ô °¨¼ÒÇÏ¿´´ø ³²Á¶·ù´Â °­¿ì°¡ ³¡³­ ÈÄ ¼ö¿ÂÀÌ $20^{circ}C$ ÀÌ»ó Áö¼ÓµÇ¸é¼­ Áú¼Ò/ÀÎ ºñ°¡ °¡Àå ³·¾ÆÁö´Â ½Ã±âÀÎ 10¿ù$(9.4{sim}18.9)$¿¡ ÇöÁ¸·®ÀÌ ±Þ°ÝÇÏ°Ô Áõ°¡ÇÏ¿© ´ë¹ß»ýÀ» ¾ß±âÇÏ¿´´Ù. ÁÖ·Î ÇѰ­ÇÏ·ù¿¡¼­ ½Ä¹°ÇöûũſÀÇ ÃµÀ̰¡ ÀϾ ¼ö Àִ ȯ°æ¿äÀÎÀº ÁýÁß°­¿ì·Î ÀÎÇÑ ÆÈ´ç´ïÀÇ ¹æ·ù·®°ú, ¼ö¿Â, Áú¼Ò/ÀÎ ºñ¿¡ ÀÇÇØ ¿µÇâÀ» ¹Þ´Â °ÍÀ¸·Î ÆÇ´ÜµÇ¾ú´Ù.
Concentrative samplings of 35 times on standing crops of phytoplankton and physicochemical factors were conducted at five sites over Seongsu Bridge to Seongsan Bridge in lower parts of the Ban River from January to December 2006. Over the study, all physicochemical factors showed no large differences among the sampling sites except station 2 having high concentrations of BOD, TN, and TP. Heavy rain also cause these concentrations to decrease. The phytoplankton species and abundance (88 taxa and $1{sim}41$,104 cells $mL^{-1}$) were varied according to the season, and sharply decreased during heavy rains. In particular, cyanobacteria dominated the phytoplankton community during dry seasons, while green algae and diatom dominated during the rainy seasons. However, after the termination of rain, high water temperatures over $20^{circ}C$ and low N/P ratios $(9.4{sim}18.9)$ evoked the cyanobacterial bloom. These results indicate that although the heavy rain (huge outflows of Paltang Dam) temporarily diluted the nutrient level and effected the cyanobacterial bloom in the lower parts of the Han River, cyanobacterial abundance was recovered by the high temperature and low N/P ratio as the rainfall discontinued.
 
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phytoplankton;heavy rain;cyanobacterial bloom;N/P ratio;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.40, no.3, 2007³â, pp.395-402
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200709905952627)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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