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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.40, no.2, 2007³â, pp.273-284
Çϱ¸¾ð ´ï À¯¹«¿¡ µû¸¥ °­ »ýŰ迡¼­ÀÇ µ¿¹°Çöûũſ µ¿ÅÂÀÇ Â÷ÀÌ
( The Differences of Zooplankton Dynamics in River Ecosystems with and without Estuary Dam in River Mouth )
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µ¿¹°ÇöûũſÀÇ °ø°£Àû ½Ã°£Àû µ¿Å º¯È­¿¡ ´ëÇØ¼­ ¼¶Áø°­ ÁßÇÏ ·ù(Çϱ¸¾ð ´ï ¹«)¹× ¿µ»ê°­ Áß ÇÏ·ù(Çϱ¸¾ð ´ï À¯)¾à 100 km±¸È¹ ³»¿¡¼­ 2004³â 11¿ùºÎÅÍ 2006³â 8¿ù±îÁö ¿ù °£°ÝÀ¸·Î Á¶»çÇÏ¿´´Ù. µÎ ¼ö°è ³» µ¿¹°Çöûũſ »ýü·®ÀÇ °ø°£Àû º¯ÀÌ´Â ¶Ñ·ÇÇÏ¿´´Ù. ¿µ»ê°­ Á¶»ç ±¸È¹ ³» ÃÑ µ¿¹°Çöûũſ ¹ÐµµÀÇ Á¾Àû º¯ÀÌ´Â ¶Ñ·ÇÇÏ¿´´Ù. °­ ÇÏ·ù Áö¿ªÀÇ Çϱ¸¾ð ´ïÀ¸·Î ÇâÇÒ¼ö·Ï ÃÑ µ¿¹°Çöûũſ ¹Ðµµ°¡ Áõ°¡ÇÏ¿´´Ù. ÀÌ¿¡ ¹ÝÇØ ¼¶Áø°­ÀÇ Á¶»ç ±¸È¹ ³» ÃÑ µ¿¹°Çöûũſ ¹Ðµµ º¯ÀÌ´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÏÁö ¾Ê¾Ò´Ù. ¿µ»ê°­ ±¸È¹ ³» Æò±Õ ÃÑ µ¿¹°Çöûũſ ¹Ðµµ´Â(Æò±Õ¹üÀ§: $199{sim}817$ °³Ã¼¼ö $L^{-1}$), 3 Á¶»çÁöÁ¡, n=20) ¼¶Áø°­ ±¸È¹ ³» Æò±Õ ÃÑ µ¿¹°Çöûũſ ¹Ðµµ(Æò±Õ¹üÀ§: $4{sim}60$°³Ã¼¼ö $L^{-1}$, 4 Á¶»çÁöÁ¡, n=20)º¸´Ù ¾à $4{sim}60$ ¹è Á¤µµ ³ô¾Ò´Ù. ¿µ»ê°­ ¼ö°è(ÃÑ µ¿¹°Çöûũſ ¹ÐµµÀÇ 86% ÀÌ»ó)¿¡¼­ À±Ãæ·ùÀÇ »ó´ë dzºÎµµ´Â ¼¶Áø°­ ¼ö°è¿¡ ºñÇØ ÇöÀúÈ÷ ³ô¾Ò´Ù. µÎ ¼ö¿ª¿¡¼­ ¿ìÁ¡ ÇÑ Á¾Àº Polyarthra spp., Brachionus spp., Colurella spp., ¹× Keratella spp. ¿´´Ù. ¼¶Áø°­ ±¸È¹ ³»¿¡¼­ÀÇ ¿ä°¢·ùÀÇ Åº¼Ò »ýü·®Àº °­ ÇÏ·ù·Î ÇâÇÒ¼ö·Ï Áõ°¡ÇÏ¿´´Ù(ÃÑ µ¿¹°Çöûũſ ź¼Ò »ýü·®ÀÇ 40% ÀÌ»ó). ½Ä¹°Çöûũſ¿¡ ´ëÇÑ ÃÑ µ¿¹°Çöûũſ ¼·½Ä·üÀÇ Æò±Õ ¹üÀ§´Â ¿µ»ê°­ ±¸È¹ ³»¿¡¼­´Â $21.2{sim}92.6mL;L^{-1};D^{-1}$À̸ç, ¼¶Áø°­ ±¸È¹ ³»¿¡¼­´Â $2.1{sim}2.6mL;L^{-1};D^{-1}$ÀÇ º¯µ¿ ¹üÀ§¸¦ º¸¿´´Ù. µ¿¹°ÇöûũſÀÇ ¼·½Ä·üÀ» °í·Á ÇØ º¼ ¶§, ¿µ»ê°­ ±¸È¹ ³»¿¡¼­ µ¿¹°Çöûũſ¿¡ ÀÇÇÑ Çöûũſ ¸ÔÀÌȯ³»¿¡¼­ÀÇ ¿ªÇÒÀÇ Á߿伺ÀÌ ¼¶Áø°­ ±¸È¹ ³»¿¡¼­ º¸´Ù »ó´ëÀûÀ¸·Î ³ôÀ» °ÍÀ¸·Î »ç·áµÈ´Ù.
The spatial and temporal zooplankton dynamics were examined along ca. 100-km section of the middle to lower Seomjin River (without estuary dam in river mouth) and Youngsan River (with estuary dam in river mouth) systems during study periods (2004. Nov.${sim}$2006. Aug.) based on a monthly sampling intervals. The spatial variation of zooplankton biomass at both river ecosystems was distinct. There was considerable longitudinal variation in total zooplankton abundance in Youngsan R. stretch. The increase in total zooplankton abundance were observed along the longitudinal stretch toward the estuary dam. In contrast, there were not statistically significant longitudinal differences in total zooplankton abundance in Seomjin R. stretch. In Youngsan R. stretch, average abundance of total zooplankton (average ranges: $199{sim}817$ Ind. $L^{-1}$ at 3 sampling sites, n=20) were nearly $4{sim}60$ fold higher than that of Seomjin R. stretch (average ranges: $12{sim}43$ Ind. $L^{-1}$ at 4 sampling sites, n=20). Relative abundance of rotifers (over 80% of total zooplankton abundance) at the whole sampling sites in Youngsan R. stretch were Much higher than that of the Seomjin R. stretch. The most abundant rotifers were Polyarthra spp., Brachionus spp., Colurella spp., and Keratella spp. at the both river ecosystems. In Seomjin R. stretch, copepods carbon biomass sharply increased toward in river mouth (over 40% of total zooplankton carbon biomass). Average ranges of total zooplankton filtering rates for phytoplankton at both river ecosystems varied from 21.2 to 92.9 mL $L^{-1};D^{-1}$ in Youngsan R. stretch and from 2.1 to 2.6 mL $L^{-1};D^{-1}$ in Seomjin R. stretch. Considering the zooplankton filtering rates, zooplankton as grazers of phytoplankton in Youngsan R. stretch seemed to play the more important role in planktonic food web than that of the Seomjin R. stretch.
 
Ű¿öµå
zooplankton;filtering rates;rotifers;estuary dam;Youngsan R.;Seomjin R.;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.40, no.2, 2007³â, pp.273-284
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200709905951055)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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