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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.36, no.2, 2003³â, pp.139-149
ÆÈ´çÈ£ ½Ä¹°ÇöûũſÀÇ Á¦ÇÑ¿µ¾ç¿°°ú ¼ºÀå·üÀÇ °æ½ÃÀû º¯È­
( Temporal Changes of Limiting Nutrients and Phytoplankton Growth Rate in Lake Paldang )
ÃÖ±¤Çö;±èÈ£¼·;ÇѸí¼ö;Ȳ¼øÁø; °Ç±¹´ëÇб³ Áö¿ª°Ç¼³È¯°æ°øÇаú;°Ç±¹´ëÇб³ Áö¿ª°Ç¼³È¯°æ°øÇаú;ÇѾç´ëÇб³ »ý¸í°úÇаú;°Ç±¹´ëÇб³ Áö¿ª°Ç¼³È¯°æ°øÇаú;
 
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ÆÈ´çÈ£ ½Ä¹°ÇöûũſÀÇ Á¦ÇÑ¿µ¾ç¿°°ú »ý¸®ÇÐÀû ¼ºÀå Æ¯¼ºÀ» Æò°¡Çϱâ À§ÇÏ¿© 2002³â 3¿ùºÎÅÍ 10ÀϱîÁö ÆÈ´çÈ£ÀÇ ¼öÁúȯ°æ Á¶»ç¿Í ÇÔ²² ½Ç³» ¹è¾ç½ÇÇèÀ» ½Ç½ÃÇÏ¿´´Ù. ÃÑÀÎÀÇ ³óµµ¿Í Chl. aÀÇ »ó°ü¼º ºÐ¼®°á°ú, ÆÈ´çÈ£ÀÇ È£¼ö»ý»ê¼ºÀº ÀÎÀÇ ¿µÇâÀ» ¸¹ÀÌ ¹ÞÀ¸¸ç TN/TP ratio¿Í ½Ä¹°ÇöûũſÀÇ ¼ºÀåÀáÀç·Â ½ÇÇèÀ» ÅëÇØ¼­µµ Á¦ÇÑ¿µ¾ç¿°Àº ÀÎÀ¸·Î Æò°¡µÇ¾ú´Ù. ƯÈ÷, º½Ã¶ÀÌ ´Ù¸¥ °èÀý¿¡ ºñÇØ »ó´ëÀûÀ¸·Î ¿ëÁ¸¹«±âÀÎÀÌ ³·Àº ³óµµ·Î Á¸ÀçÇϱ⠶§¹®¿¡ ³ôÀº ÀÎ Á¦ÇÑÀ» ¹Þ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ±×·¯³ª ÀÎÀÇ Á¦ÇÑÁ¤µµ´Â °èÀýÀûÀÎ º¯À̸¦ ³ªÅ¸³»¾úÀ¸¸ç, ½Ã±â¿¡ µû¶ó Áú¼Ò¿Í ±Ô¼Ò¿¡ ÀÇÇÑ Á¦ÇѰ¡´É¼ºµµ ³ªÅ¸³µ´Ù. ÆÈ´çÈ£ ½Ä¹°Çöûũſ ±ºÁýÀÇ Ãִ뼺Àå·ü(${mu}_{max}$)Àº 0.8${sim}$l.1$day^1$ÀÇ ¹üÀ§·Î ³ªÅ¸³µÀ¸¸ç, ¹ÝÆ÷È­³óµµ($K_u$)´Â 0.1${sim}$O.8${mu}M$·Î 5¿ù¿¡ $0.8{mu}M$·Î °¡Àå ³ô°í 9¿ù¿¡ $0.1{mu}M$·Î °¡Àå ³·Àº °ÍÀ¸·Î Á¶»çµÇ¾ú´Ù. ÀÌ´Â ¿µ¾ç¿° Èí¼ö¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â ÀÎÀÇ cell quota¿Í °ü·ÃÀÌ ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç, 5¿ù¿¡ $0.13{mu}gP/{mu}gChl.$ 3·Î ³·Àº °ªÀ» ³ªÅ¸³Â´Ù. ½Ä¹°ÇöûũſÀÇ ¼ºÀ寝¼º ºÐ¼®À» ÅëÇØ ÆÈ´çÈ£¿¡¼­´Â º½¿¡ ºñÇØ ¿©¸§°ú °¡À»Ã¶¿¡ ¹ß»ýÇÑ ½Ä¹°ÇöûũſÀÇ ¼ºÀåÀÌ °æÀïÀûÀ¸·Î ºü¸£°Ô ¹ß´ÞÇÒ ¼ö ÀÖ´Â ÀáÀ缺ÀÌ ÀÖ´Â °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. °á°úÀûÀ¸·Î, ÆÈ´çÈ£ ½Ä¹°Çöûũſ ¼ºÀåÀº ÁÖ·Î Àο¡ ÀÇÇÏ¿© Á¦ÇÑµÇ¸ç ¿©¸§ ¸ó¼ø ÀÌÈÄ ¼öüÀÇ ¾ÈÁ¤±âµ¿¾È ³ôÀº ¼ºÀåÀ» ÇÒ ¼ö ÀÖ´Â »ý¸®Àû Ư¼ºÀ» °¡Áö°í ÀÖ´Â °ÍÀ¸·Î ÃßÁ¤µÈ´Ù. ³»ºÎ($4.7{ imes}10^3$ cells/L)¿¡¼­ ÃÖÀú¸¦ ³ªÅ¸³Â´Ù. Â÷±¤½Ã¼³¿¡ ÀÇÇÑ ½Ä¹°Çöûũſ ÇöÁ¸·® Àú°¨À²Àº 8${sim}$38% (Æò±Õ 19.9%)·Î ³ªÅ¸³µ´Ù. ÀÌ»óÀÇ °á°ú¿¡¼­ Â÷±¤Àº ½Ä¹°ÇöûũſÀÇ ÇöÁ¸·®Àú°¨¿¡ ¾î´À Á¤µµ È¿°ú°¡ ÀÖÀ½À» ¾Ë ¼ö ÀÖ¾ú´Ù.¼ö¿¡¼­ µ¿¹°ÇöûũſÀÇ ¼·½ÄÀ̳ª Á¦ÇÑ¿µ¾ç¿°ÀÇ °áÇÌÀÌ ½Ä¹°ÇöûũſÀÇ ÇöÁ¸·®¿¡ ¿µÇâÀ» Ãâ ¼ö ÀÖÀ¸³ª ±ºÁýÀÇ º¯È­¸¦ ¾ß±âÇÏÁö´Â ¸øÇÔÀÌ Á¦½ÃµÇ¾ú´Ù.X>$NH_4;^+$, $NO_3;^-$, $PO_4;^{3-}$ ¹× $SiO_2$ÀÇ ¿ëÃâ·® ¹üÀ§´Â °¢°¢ -9${sim}$ 105 mgN $m^{-2}day^{-1}$, -156${sim}$62 $m^{-2}day^{-1}$ -5${sim}$5 $m^{-2}day^{-1}$, ¹× 12 ${sim}$ 117 $m^{-2}day^{-1}$¿´´Ù. ³«µ¿°­°ú ¼­³«µ¿°­¿¡¼­ ½Ä¹°ÇöûũſÀÇ 1Â÷ »ý»ê¼º°ú Á¶Ã¼ÀÇ C:N:PÀÇ Redfield ºñÀ² 106: 16: 1À» ÀÌ¿ëÇÏ¿© ÃßÁ¤ÇѰá°ú ÀúÁú¿¡¼­ ¿ëÃâµÇ´Â $NH_4;^+$´Â ½Ä¹°ÇöûũſÀÇ ¿ä±¸·®ÀÇ 9 ${sim}$23%À̾ú°í, $PO_4;^{3-}$´Â 11 ${sim}$ 22%¸¦ Â÷ÁöÇÏ¿´´Ù.µµ·Î °ËÃâµÇ¾î À̸¦ °í·ÁÇÑÁ¤¼ö°øÁ¤ÀÇ °ü¸®°¡ ÇÊ¿äÇϸ®¶ó »ý°¢µÈ´Ù.$yr^{-1}$)ÀÇ 71%°¡ °¨¼ÒµÇ¾î¾ß ÇÒ Çʿ伺ÀÌ Á¦±âµÇ¾ú´Ù. ¶ÇÇÑ ¿©¸§Ã¶ ½ÉÃþ »ê¼Ò °í°¥ÀÌ ¾ß±âµÇ¾ú°í,
This study was conducted to determine limiting nutrients and the physiological characteristics of phytoplankton in response of nutrients in Lake Paldang from March 2002 to October 2002. A field research was conducted along with laboratory batch culture experiment to find the limiting nutrients and the growth kinetics. According the results of Chl. a TP relationship, TN/TP ratio, and nutrient addition bioassay, phosphorus appeared to be a major limiting nutrient in Lake Paldang and thus the lake productivity was greatly influenced by it. P limitation for the phytoplankton of Lake Paldang varied with season, and the possibility of limitation by nitrogen and silica also occurred. The degree of P limitation was greatest during spring when the concentration of dissolved phosphorus is relatively much lower than summer and autumn. The maximum growth rate (${mu}_{max}$) and half saturation concentration ($K_u$) of Lake Paldang phytoplankton ranged from 0.8${sim}$1.1$day^1$ and from 0.1${sim}$O.8${mu}M$, respectively. $K_u$ was highest during May ($0.8{mu}M$) and the lowest during September ($0.1{mu}M$). Such result may be induced by the phytoplankton cell quota that showed the lowest concentration ($0.13{mu}gP/{mu}gChl.$ a) during May. The growth kinetics showed that phytoplankton growth in Lake Paldang was faster during summer and autumn than spring, suggesting that the Potential of algal bloom is high after the summer monsoon season.
 
Ű¿öµå
Phytoplankton;Limiting nutrient;Phosphorus;Growth kinetics;Maximum growth rate (${mu}_{max}$);Half saturation concentration ($K_u$);Lake Paldang;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.36, no.2, 2003³â, pp.139-149
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200318317181157)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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