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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.39, no.3, 2006³â, pp.366-377
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( Spatial and Temporal Variations of Environmental Factors and Phytoplankton Community in Lake Yongdam, Korea )
±Ç»ó¿ë;±è¿µ±æ;ÀÌ¿øÈ£;ÀÓº´Áø;±è¹üö;Çã¿ì¸í; °­¿ø´ëÇб³ ȯ°æÇаú;Çѱ¹Á¾ÇÕȯ°æ¿¬±¸¼Ò;±º»ê´ëÇб³ ÇØ¾çÁ¤º¸°úÇаú;±¹¸³È¯°æ°úÇпø;°­¿ø´ëÇб³ ȯ°æÇаú;°­¿ø´ëÇб³ ȯ°æ¹æÀç°øÇаú;
 
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¿ë´ãÈ£ÀÇ 3°³ Á¤Á¡¿¡¼­ ȯ°æ¿äÀÎ ¹× ½Ä¹°ÇöûũſÀÇ ±ºÁý¿¡ ´ëÇØ 2002³â 4¿ùºÎÅÍ 2004³â3ÀϱîÁö 1°³¿ù °£°ÝÀ¸·Î Á¶»çÇÏ¿´´Ù. ¼ö¿Â¾àÃþÀº 7¿ù°ú 8¿ù¿¡ ¼ö½É ¾à 10 m Áö¿ª¿¡¼­ Çü¼ºµÇ¾úÀ¸¸ç, 10¿ù¿¡´Â ´Ù¼Ò ³·¾ÆÁ® 25${sim}$30 m »çÀÌ¿¡¼­ °üÂûµÇ¾ú´Ù. ÃÑÀÎ (TP)ÀÇ ¿ùº° Ç¥ÃþÆò±Õ (0${sim}$5 m) ³óµµ´Â Á¤Á¡ 1, 2 ¹× 3¿¡¼­ °¢°¢ $5.1{sim}36.1;mg;P;{cdot};m^{-3}$, $6.1{sim}77.7;mg;P;{cdot};m^{-3}$ ¹× $6.7{sim}47.7;mg;P;{cdot};m^{-3}$·Î »ó·ùÁö¿ª¿¡¼­ ³ô°Ô ³ªÅ¸³µ´Ù. ÃÑÁú¼Ò (TN)ÀÇ ¿ùº° Ç¥Ãþ (0${sim}$5 m)Æò±Õ ³óµµ´Â Á¤Á¡ 1ÀÌ $0.88{sim}1.73;mg;N;{cdot};L^{-1}$À̾úÀ¸¸ç, Á¤Á¡ 3¿¡¼­ $0.94{sim}2.77;mg;N;{cdot};L^{-1}$·Î Á¤Á¡ 1¿¡ ºñÇØ ³ô¾Ò´Ù. Åõ¸íµµ´Â 0.8${sim}$6.7mÀÇ ¹üÀ§·Î »ó·ùÁö¿ª¿¡¼­ ³·¾Ò°í ÇÏ·ùÁö¿ª¿¡¼­ ³ô¾Ò´Ù. ¿©¸§°ú °¡À»Ã¶¿¡ ³²Á¶·ùÀÎ Microcystis, Anabaena ¹× Aphanizomenon µî¿¡ ÀÇÇÑ ¼öÈ­Çö»óÀÌ ³ªÅ¸³µÀ¸¸ç. ½Ä¹°Çöûũſ ÇöÁ¸¶ûÀº ¼ö¿Â, ÃÑÀΰú ¾çÀÇ »ó°ü°ü°è¸¦ º¸¿´´Ù. ½Ä¹°Çöûũſ ÇöÁ¸·®Àº ºÐ·ù±ºº°·Î º¸¸é ³²Á¶·ù¿Í ³ìÁ¶·ù°¡ ¼ö¿Â ¹× ÃÑÀΰú ³ôÀº ¾çÀÇ »ó°ü¼ºÀ» º¸¿© °í¿Â¼ºÀÇ Àγ󵵿¡ Á¦ÇѵǴ µÎ ºÐ·ù±ºÀÇ Á߿伺ÀÌ ¸Å¿ì Å« °ÍÀ¸·Î »ý°¢µÈ´Ù. Åõ¸íµµ ¹× Áú»ê¼ºÁú¼Ò´Â ½Ä¹°ÇöûũſÀÇ ÇöÁ¸·®°ú À½ÀÇ »ó°ü°ü°è¸¦ ³ªÅ¸³Â´Ù. ¿ë´ãÈ£ÀÇ ¼öÁú¿µ¾ç´Ü°è´Â Áß ${cdot}$ ºÎ¿µ¾ç»óÅÂÀÎ °ÍÀ¸·Î »ç·áµÈ´Ù.
Environmental gradients and phytoplankton community were studied on a monthly basis, at 3 stations of Lake Yongdam, from April 2002 March 2004. During July to August, thermocline formed at the depth of about 10 m, but it was lowerd depth, in between 25${sim}$30 m in October. Monthly variations of the epilimnetic (0${sim}$5 m) TP concentrations at station 1, 2 and 3 were in the range of $5.1{sim}36.1;mg;P;{cdot};m^{-3}$, $6.1{sim}77.7;mg;P;{cdot};m^{-3}$ and $6.7{sim}47.7;mg;P;{cdot};m^{-3}$ respectively; with higher concentrations at the upstream areas showing. Monthly average of the epilimnetic (0${sim}$5 m) TN concentration at Station 1 was in the range of $0.88{sim}1.73;mg;N;{cdot};L^{-1}$, and Station 3 was in the range of $0.94{sim}2.77;mg;N;{cdot};L^{-1}$, which is higher if compared with the values of station 1. Transparency wa:s in the range of 0.8${sim}$6.7 m, with lower values at upstream areas and higher at the downstream area. As for phytoplankton, during the winter season, diatoms had high appearance rate; during the spring season, Cyclotella comta, Aulacoseira ambigua f. spiralis, A. granulata and similar diatoms, during spring and summer Ankistrodesmus spiralis, Chodatella subsala, Crucigenia irregularis, Coelastrum cambricum, Scenedesmus ecornis v. ecornis.
 
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environmental factors;Lake Yongdam;nutrients;phytoplankton;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.39, no.3, 2006³â, pp.366-377
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200618317187436)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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