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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.41, no.2, 2008³â, pp.174-187
ÆÈ´çÈ£ Çöûũſ ±ºÁýÀÇ Åº¼Ò»ý¹°·® µ¿ÅÂ
( Carbon Dynamics of Plankton Communities in Paldang Reservoir )
³ë¼ºÀ¯;ÇѸí¼ö; ÇѾç´ëÇб³ ºÐÀÚ»ý¸íȯ°æ°úÇаú;ÇѾç´ëÇб³ »ý¸í°úÇаú;
 
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º» ¿¬±¸´Â ÆÈ´çÈ£ÀÇ È¿°úÀûÀΠȣ¼Ò°ü¸®¸¦ À§ÇÏ¿© ¹Ì¼¼ ¸ÔÀ̸ÁÀÇ ±¸Á¶¿Í ±â´ÉÀ» ÀÌÇØÇϰíÀÚ °æ¾Èõ(Á¤Á¡ K), ÆÈ´ç´ï (Á¤Á¡ P)±×¸®°í ³² ºÏÇѰ­ ÇÕ·ùºÎ(Á¤Á¡ M)¿¡¼­ 2005³â 3¿ùºÎÅÍ 12¿ù±îÁö ¸Å¿ù 1ȸ¾¿ ȯ°æ ¿äÀΰú ¹Ì¼Ò »ý¹°¿äÀÎÀÇ »ý¹°·®À» Á¶»çÇÏ¿´´Ù. Á¶»ç±â°£ µ¿¾È DOC´Â $3{sim}5$¿ù ±×¸®°í 11¿ù¿¡ ³ôÀº °ªÀ» º¸¿´´Ù. ¿µ¾ç¿°·ù´Â ´Ù¸¥ 2°³ Á¤Á¡º¸´Ù »ó´ëÀûÀ¸·Î Á¤Á¡ K¿¡¼­ ³ôÀº ¼öÄ¡¸¦ º¸¿´´Ù. Àλ꿰°ú ±Ô»ê¿°Àº ¿©¸§Ã¶ ÁýÁß°­¿ì±â ÀÌÈÄ¿¡ 3°³ Á¤Á¡¿¡¼­ Á¡ÁøÀûÀ¸·Î Áõ°¡ÇÏ¿´À¸³ª, 9¿ù ÀÌÈÄ¿¡´Â °¨¼ÒÇÏ´Â ¾ç»óÀ» ³ªÅ¸³»¾ú´Ù. Chl-$alpha$ÀÇ º¯È­´Â 3°³ Á¤Á¡¿¡¼­ 4¿ù°ú 11¿ù¿¡ ¸Å¿ì ³ôÀº °ªÀ» º¸¿´´Ù. ¹ÚÅ׸®¾Æ¿Í HNFÀÇ Åº¼Ò·®Àº 3¿ù, 5¿ù ±×¸®°í 8¿ù¿¡ ³ôÀº °ªÀ» º¸¿´À¸³ª, ¼¶¸ðÃæÇöûũſÀÇ ¿ùº°Åº¼Ò·®ÀÇ º¯È­´Â Å« º¯È­¸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù. ±×·³¿¡µµ ºÒ±¸ÇÏ°í ¼¶¸ðÃæÇöûũſ(P<0.001)°ú HNF(P<0.05)ÀÇ Åº¼Ò·® º¯È­´Â ¹ÚÅ׸®¾Æ ź¼Ò·®ÀÇ º¯È­¿Í ³ôÀº »ó°ü°ü°è¸¦ º¸¿´´Ù. ÀÌ ½Ã±â¿¡´Â Tintinnopsis cratera, Didinium sp., Vorticella sp., Paramecium sp. ±×¸®°í Strombidium sp.°¡ ¿ìÁ¡Á¾À¸·Î ¹àÇôÁ³´Ù. ½Ä¹°Çöûũſ ¿ìÁ¡Á¾Àº º½Ã¶, ¿©¸§Ã¶ ±×¸®°í °¡À»Ã¶¿¡ Stephanodiscus hantzschii¿Í Cyclotella meneghiniana°¡ 3°³ Á¤Á¡¿¡¼­ ¸ðµÎ ¿ìÁ¡ÇÏ¿´´Ù. ±×·¯³ª °¡À»Ã¶¿¡´Â Á¤Á¡ P¿Í Á¤Á¡ M¿¡¼­ Aulacoseira granulata°¡ 95%ÀÌ»óÀ¸·Î ±ØÈ÷ ³ô°Ô ¿ìÁ¡ÇÏ¿´´Ù. µ¿¹°ÇöûũſÀÇ Åº¼Ò·®Àº 6¿ù¿¡ Á¤Á¡ P¿Í Á¤Á¡ M¿¡¼­ °¡Àå ³ôÀº »ý¹°·®À» ±â·ÏÇÏ¿´À¸¸ç, 8¿ù, 10¿ù ±×¸®°í 11¿ù¿¡µµ 3°³ Á¤Á¡¿¡¼­ »ó´ëÀûÀ¸·Î ³ôÀº »ý¹°·®ÀÌ °üÂûµÇ¾ú´Ù. µ¿¹°ÇöûũſÀº 6¿ù¿¡ Á¤Á¡ P¿Í Á¤Á¡ M¿¡¼­ Diaphanosoma brachyurumÀÌ Á¦1¿ìÁ¡Á¾À¸·Î ¹àÇôÁ³À¸¸ç, °¡À»Ã¶ÀÎ 10¿ù°ú 11¿ù¿¡´Â 3°³ Á¤Á¡¿¡¼­ Bosmina longirostris°¡ ¿ìÁ¡ÇÏ¿´´Ù. Bosmina longirostris´Â Aulacoseira granulata¿Í Stephanodiscus hantzschii¸¦ ¸ÔÀÌ·Î °ø±ÞÇÏ¿´À» ¶§ ³ôÀº ¼ºÀå·ü(A. granulata: $0.17;d^{-1}$, S. hantzschii: $0.14^{-1};d^{-1}$)°ú ¼·½Ä·ü (A. granulata: 1.93 preys $d^{-1}$, S. hantzschii: 1.63 preys $d^{-1}$)À» º¸¿´´Ù. ÀÌ»óÀÇ °á°ú·Î, ¹ÚÅ׸®¾Æ¿Í ½Ä¹°ÇöûũſÀº ÁÖ¿ä ¸ÔÀÌ¿øÀ¸·Î¼­, º½Ã¶°ú ¿©¸§Ã¶Àº bacteria¸¦ ¸ÔÀÌ·Î ÇÏ´Â microbial food chainÀÌ ÁÖ¿ä±â´ÉÀ¸·Î, °¡À»Ã¶¿¡´Â ½Ä¹°ÇöûũſÀ» ¸ÔÀÌ·Î ÇÏ´Â grazing food chainÀÌ Áß¿äÇÑ ±â´ÉÀ» °®´Â °ÍÀ¸·Î ½Ã»çÇÑ´Ù.
In an effort to identify structure and function of microbial loop in Paldang reservoir, we monitored environmental and biological factors at Kyungan stream (station K), Paldang dam (station P) and the confluence of North and South Han River (station M) from March to December, 2005. DOC concentration was higher in March to May and November than the others. Nutrient concentration in station K detected relatively higher than that of two stations. Both of phosphate and silicate gradually increased at all stations until September, after then decreased. The highest Chl-$alpha$ concentration was observed at all stations in April, and November. The carbon biomass of bacteria and HNF were relatively higher in March, May and August than the others, whereas that of the ciliate showed no significant difference in monthly fluctuation. Nevertheless, the significant relationships revealed between ciliate (P<0.001) and HNF (P<0.05) and bacterial density. Tintinnopsis cratera, Didinium sp., Vorticella sp., Paramecium sp. and Strombidium sp. were dominant species in ciliate community. The dominant species of phytoplankton were Stephanodiscus hantzschii and Cyclotella meneghiniana at almost stations in Spring, Summer and Autumn. However, Aulacoseira granulata accounted for >95% of phytoplankton biomass at station P and M in Autumn. The carbon biomass of zooplankton was highest at station P and M in June, and relatively higher biomass observed at all stations in August, October and November. Diaphanosoma brachyurum and Bosmina longirostris were dominant in stations P and M of June and in all stations of October and November, respectively. The maximum growth (A. granulata: $0.17;d^{-1}$, S. hantzschii: $0.14;d^{-1}$) and grazing rate (A. granulata: 1.93 preys $d^{-1}$, S. hantzschii: 1.63 preys $d^{-1}$) of Bosmina longirostris revealed in algal preys as Aulacoseira granulata and Stephanodiscus hantzschii. In conclusion, these results suggest that bacteria and phytoplankton can play the most crucial source as prey within microbial food chain in Spring and Summer and grazing food chain in Autumn, respectively.
 
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Paldang reservoir;environmental factor;plankton communities;microbial loop;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.41, no.2, 2008³â, pp.174-187
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200827448607751)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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