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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.37, no.4, 2004³â, pp.385-393
³«µ¿°­(Çѱ¹)ÀÇ ¼¼ Áö·ù¿¡¼­ Æ÷½Ä À±Ãæ·ù °³Ã¼±º µ¿Å ¹× ÃÊ½Ä À±Ãæ·ù ±ºÁý¿¡ ¹ÌÄ¡´Â ¿µÇâ
( Population Dynamics of Predator (Asplanchna spp.) and its Impact on Herbivorous Rotifers Community in Three Tributaries of the Nakdong River (S. Korea) )
±èÇö¿ì;À層Çö;½Å¿î±Õ;¶ó±àȯ;Á¤±¤¼®;ÁÖ±âÀç; ¼øÃµ´ëÇб³ ȯ°æ±³À°Çаú;½Å½´´ëÇб³;ºÎ»ê´ëÇб³ »ý¹°Çаú;ºÎ»ê´ëÇб³ »ý¹°Çаú;ºÎ»ê´ëÇб³ »ý¹°Çаú;ºÎ»ê´ëÇб³ »ý¹°Çаú;
 
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³«µ¿°­ÀÇ ¼¼ Áö·ù¿¡¼­(±ÝÈ£°­, ³²°­, Ȳ°­) Áö³­ 2001³â 1¿ùºÎÅÍ 2002³â 12¿ù±îÁö °ÝÁÖ °£°ÝÀ¸·Î ÃÊ½Ä À±Ãæ·ù ±ºÁý (Brachionus spp.)°ú Æ÷½Ä À±Ãæ·ù(Asplanchna spp.)°£ÀÇ °³Ã¼±º µ¿Å¿¡ ´ëÇØ¼­ Æò°¡ ÇÏ¿´´Ù. ÃÊ½Ä À±Ãæ·ùµéÀÇ ³ôÀº ±ºÁý ¹Ðµµ(ÃÖ°í ¹Ðµµ: ¾à >1000°³Ã¼/¸®ÅÍ)´Â µÎ Áö·ù¿¡¼­ (±ÝÈ£°­°ú ³²°­) º½°ú °¡À» ½Ã±â¿¡ ¹Ýº¹ÀûÀ¸·Î ³ªÅ¸³µÀ¸³ª ´Ù¸¥ ÇϳªÀÇ Áö·ù (Ȳ°­)¿¡¼­´Â °üÂûµÇÁö ¾Ê¾Ò´Ù. ÃÊ½Ä À±Ãæ·ù Áß, Brachionus spp. (7Á¾À¸·Î ±¸¼º) ±ºÁýµéÀÌ º» Á¶»çÁöÁ¡¿¡¼­ ´ëÇ¥ÀûÀÎ Á¾À¸·Î ÆÄ¾ÇµÇ¾ú´Ù. Brachionus spp.¿Í ¿¬Áß ºñ½ÁÇÑ ½Ã±â¿¡ ÃâÇöÇÏ´Â Á¾Àº Asplanchna¿´´Ù. Asplanchna´Â B. angularis¿Í B. calyciflorusÁ¾µéÀÇ ³ôÀº °³Ã¼±º ¹Ðµµ ½Ã±â¿Í À¯»çÇÏ°Ô °³Ã¼¼ö°¡ Áõ°¡ÇÏ¿´´Ù. ±× °á°ú·Î, µÎ °³Ã¼±ºµéÀÇ (B. angularis¿Í B. calyciflorus) ¹Ðµµ´Â AsplanchnaÃâÇö ÀÌÈÄ ±Þ¼ÓÈ÷ °¨¼ÒÇÏ¿´´Ù(±ÝÈ£°­°ú ³²°­).±×·¯³ª ´Ù¸¥ ÇÑ Áö·ùÀΠȲ°­¿¡¼­´Â ¶Ñ·ÇÇÑ Æ÷½Ä ¹× ÃÊ½Ä À±Ãæ·ù °£ÀÇ »óÈ£°ü°è´Â ÆÄ¾ÇµÇÁö ¾Ê¾Ò´Ù. º» Á¶»ç °á°ú·Î º½ ¹× °¡À» Áß¼ø ±â°£ÀÇ Á¶»çÁöÁ¡¿¡¼­´Â À±Ãæ·ù ±ºÁý°£ÀÇ ¶Ñ·ÇÇÑ º¯È­ ¾ç»óÀÌ ÆÄ¾ÇµÇ¾ú´Ù. ƯÈ÷, Asplanchna °³Ã¼±ºÀº ³ôÀº ¿µ¾ç ´Ü°è Áö·ù ½Ã½ºÅÛ ³»¿¡¼­ º½°ú °¡À»ÀÇ ÃÑ Çöûũſ »ý¹°·®°ú À±Ãæ·ù ±ºÁýÀÇ ÁÖ¿äÇÑ Á¶ÀýÀڷνáÀÇ ¿ªÇÒÀ» ÇÒ °ÍÀ¸·Î ÆÄ¾ÇµÈ´Ù.
The herbivorous rotifers community (Brachionus spp.) and population dynamics of the predator rotifer (Asplanchna spp.) in three tributaries (Kumho R., Nam R., and Hwang R.) of the Nakdong River were evaluated on biweekly intervals from Jan. 2001 and Dec. 2002. High abundance of the herbivorous rotifers (peak density: - ca.>1000 Ind. $L^{-1}$) was observed from two tributaries (Kumho R. and Nam R.) during the spring and fall seasons, respectively. The high peaks of herbivorous rotifers were not evident in one tributary (Hwang R.). Among the herbivorous rotifers, brachionid rotifers (Brachionus spp. consisting of 7 species) were the characteristic rotifer community in this study. Brachionus spp. tended to occur together with the other perennial species, Asplanchna. Asplanchna was also present while two species of B. angularis and B. calyciflorus were highest in density. Subsequently, two populations (B. angularis and B. calyciflorus) rapidly declined, becoming rare after high peaks of Asplanchna occurred, except in one tributary (Hwang R.). We found community shifts in rotifer groups in mid-spring and mid-fall at the study site. The Asplanchna population could be appeared to play an important role in regulating the rotifer community and total plankton biomass in spring and fall at high trophic levels.
 
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herbivorous rotifers;Asplanchna;Brachionus;Nakdong river;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.37, no.4, 2004³â, pp.385-393
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200418317183469)
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