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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.38, no.3, 2005³â, pp.412-419
³«µ¿°­ Áß·ùÁöÁ¡¿¡¼­ÀÇ µ¿¹°Çöûũſ µ¿ÅÂÀÇ ¿¬°£ º¯ÀÌ ¹× Ư¼º(³«µ¿°­)
( Characteristics and Inter-annual Variability of Zooplankton Dynamics in the Middle Part of the River (Nakdong River) )
À層Çö;ÁÖ±âÀç;±èÇö¿ì; ¿¡È÷¸Þ´ëÇб³ ÇØ¾çȯ°æ¿¬±¸¼¾ÅÍ;ºÎ»ê´ëÇб³ »ý¹°Çаú;¼øÃµ´ëÇб³ ȯ°æ±³À°Çаú;
 
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³«µ¿°­ Áß·ù ÁöÁ¡¿¡¼­ (¿Ö°ü, ³«µ¿°­ Çϱ¸¾ðÀ¸·ÎºÎÅÍ 175 km »ó·ù ÁöÁ¡) 1998³â 1¿ùºÎÅÍ 2002³â 12¿ù±îÁö µ¿¹°Çöûũſ ±ºÁý µ¿Å ¹× ȯ°æ¿äÀÎ µé°úÀÇ »ó°ü°ü°è¿¡ ´ëÇØ¼­ Á¶»çÇÏ¿´´Ù. Á¶»çÁöÁ¡¿¡¼­ÀÇ µ¿¹°ÇöûũſÀÇ °èÀýº° º¯È­¿Í ¿¬°£ º¯È­´Â ¸Å¿ì ¶Ñ·ÇÇÏ¿´À¸¸ç(ANOVA, p<0.01), 1998³â°ú 2002³âÀ» Á¦¿ÜÇϰí´Â 1999³âºÎÅÍ 2001³â±îÁö 3³â µ¿¾È À¯»çÇÑ µ¿¹°Çöûũſ ¾ç»óÀ» ³ªÅ¸³»¾ú´Ù. Á¶»ç±â°£ µ¿¾È ¿¬ Æò±Õ À±Ãæ·ùÀÇ °³Ã¼¼ö´Â 43${pm}76 ind. $L^{-1}$ (Æò±Õ${pm}$ s.d., n = 118)À̸ç, ¿ä°¢·ù (1.6${pm}$4.8 ind. $L^{-1}$)¿Í Áö°¢·ù (0.4${pm}$1.2 ind. $L^{-1}$) ¼øÀ¸·Î ³ªÅ¸³µ´Ù. À±Ãæ·ù ±ºÁý³»¿¡¼­´Â Brachionus spp. Polyarthra spp., Colurella spp., Keratella spp.¿Í Trichocerca spp. µîÀÌ ¿ìÁ¡ÇÏ¿´´Ù. ÀÌ·¯ÇÑ Á¾µéÀº Àüü ÃÑ À±Ãæ·ùÀÇ °³Ã¼¼ö¿¡ ´ëÇÑ »ó´ë dzºÎµµÀÇ 80% ÀÌ»óÀ» Â÷ÁöÇÏ¿´´Ù. Á¶»çÁöÁ¡ ³» ÃÑ µ¿¹°Çöûũſ °³Ã¼¼ö´Â º½°ú °¡À»¿¡ ±Þ°ÝÈ÷ Áõ°¡ ÇÏ¿´À¸¸ç, °Ü¿ï µ¿¾È¿¡´Â ³·Àº °³Ã¼¼ö¸¦ À¯ÁöÇÏ¿´´Ù. ¿©¸§±â°£ µ¿¾È, µ¿¹°Çöûũſ µ¿Å´ ¼ö¹®ÇÐÀû ¿äÀο¡ ÀÇÇØ Å©°Ô ¿µÇâÀ» ¹Þ´Â °ÍÀ¸·Î ÆÄ¾ÇµÈ´Ù. Á¶»ç±¸È¹ ³» µ¿¹°ÇöûũſÀÇ µ¿Å´ ³»Àû¿äÀÎ (µ¿¹°ÇöûũſÀÇ ¸ÔÀÌ»óÅÂ, ¿¹: ½Ä¹°Çöûũſ »ýü·®) º¸´Ù´Â ¿ÜÀû ¿äÀÎ (°­ÀÇ ¼ö¹®ÇÐÀû ¿äÀÎ)µé¿¡ ÀÇÇØ¼­ º¸´Ù ´õ Å« ¿µÇâÀ» ¹Þ´Â °ÍÀ¸·Î »ç·áµÈ´Ù.
The dynamics of zooplankton community and its relationship with environments were studied at the middle stretch (Waekwan, RK; river kilometer; above 175 km from the estuary dam) of large regulated river, Nakdong River from 1998 to 2002. There were distinct inter-annual variations and seasonal changes in total zooplankton abundance in the study site (ANOVA, p<0.01), displaying similar pattern in three years from 1999 to 2001 except 1998 and 2002. The annual average rotifers abundance during the study period was 43${pm}76 ind. $L^{-1}$ (mean${pm}$s.d., n = 118), followed by adult copepodids (1.6${pm}$4.8 ind. $L^{-1}$), and small cladocerans (0.4${pm}$1.2 ind. $L^{-1}$). Among the rotifers, Brachionus spp. Polyarthra spp., Colurella spp., Keratella spp.¡¤, and Trichocerca spp. were the most common taxa. These species occupied more than 80% of the total rotifer abundance throughout the study period. Total zooplankton abundance rapidly increased in spring and fall and remained low throughout the winter. During summer, zooplankton dynamics seemed to be largely affected by hydrological parameters. Overall, rather the external factors (hydrological factors of the river) than internal factors (food condition for zooplankton such as phytoplankton biomass) appear to be responsible for changes in zooplankton dynamics in the middle stretch of the river.
 
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inter-annual variation;zooplankton;rotifer;hydrology;Nakdong river;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.38, no.3, 2005³â, pp.412-419
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200518317185119)
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