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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.36, no.4, 2003³â, pp.420-426
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°-Àú¼öÁö º¹ÇÕÇü ½Ã½ºÅÛ³» º½ µ¿¹°ÇöûũſÀÇ ¿ªµ¿¼º (³«µ¿°, Çѱ¹): ½Ä¹°Çöûũſ »ýü·® Á¶ÀýÀڷμÀÇ ¿ªÇÒ
( The Spring Metazooplankton Dynamics in the River-Reservoir Hybrid System (Nakdong River, Korea): Its Role in Controlling the Phytoplankton Biomass ) |
| À層Çö;Á¤±¤¼®;ÁÖ±âÀç;±èÇö¿ì; ½Å½´´ëÇб³ ´ã¼öȯ°æ¿¬±¸¼¾ÅÍ;ºÎ»ê´ëÇб³ »ý¹°Çаú;ºÎ»ê´ëÇб³ »ý¹°Çаú;¼øÃµ´ëÇб³ ȯ°æ±³À°°ú;
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| Áö³ 3³â°£(2000-2002), ½Ä¹°Çöûũſ »ýü·®ÀÇ ¿ªµ¿ÀûÀÎ º¯È¿Í ³ôÀº Åõ¸íµµ°¡ º½ÀÇ Áß¼ø ±â°£ µ¿¾È ³«µ¿° ÇÏ·ù ºÎºÐ¿¡¼ ¹Ýº¹ÀûÀ¸·Î °üÂûµÇ¾ú´Ù. À±Ãæ·ùµéÀº(Brachionus, Keratella, Polyarthra), º½ÀÇ Áß¼ø°ú ´Êº½ ±â°£ µ¿¾È¿¡ ±Þ°ÝÈ÷ Áõ°¡ÇÏ¿´´Ù. ´Êº½ ±â°£ µ¿¾È ¼öüÀÇ ÀÜ·ù½Ã°£ÀÇ Áß°¡ (¾à 20ÀÏ Á¤µµ)¿Í ¼ö¿ÂÀÇ »ó½Â½Ã±â¿¡, $10^{circ}C$·Î ºÎÅÍ $20^{circ}C$ ÀÌ»ó, Áö°¢·ùÀÇ Áõ°¡¸¦ ³ªÅ¸³»¾ú´Ù. º½ÀÇ Áß¼ø ³ôÀº ½Ä¹°Çöûũſ »ýü·® ½Ã±â ÀÌÈÄ, ªÀº ±â°£(¾à 1-2ÁÖ)µ¿¾È ³·Àº ½Ä¹°Çöûũſ »ýü·®°ú ³ôÀº ¼¼Å° Åõ¸íµµ°¡ º» Á¶»çÁöÁ¡¿¡¼ ³ªÅ¸³µ´Ù. º½ ±â°£ µ¿¾È µ¿¹°ÇöûũſÀÇ ¼·½Ä·üÀº ¸Å¿ì ³ôÀ¸¸ç, ÀÌ·¯ÇÑ µ¿¹°ÇöûũſÀÇ ³ôÀº ¼·½Ä Ȱ¼ºµµ´Â ½Ä¹°Çöûũſ µ¿Å¸¦ Á¶ÀýÇÏ´Â °ÍÀ¸·Î »ç·áµÈ´Ù. º» ¿¬±¸ °á°ú´Â °ÀÇ ¼öü°¡ ´Ù¼Ò Á¤Ã¼µÇ¾î ÀÖ´Â º½ ±â°£ µ¿¾È ½Ä¹°Çöûũſ »ýü·®ÀÇ Á¶ÀýÀº µ¿¹°ÇöûũſÀÇ ¼·½Ä¿¡ ÀÇÇØ Á¶ÀýµÉ ¼ö ÀÖÀ½À» ½Ã»çÇÑ´Ù. |
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| During a three-year study (2000-2002), dramatic changes in the phytoplankton biomass and high transparency were repeatedly observed during mid-spring in the lower part of the Nakdong River. Rotifers (Brachionus, Keratella, Polyarthra) , sharply increased toward the middle and end of spring. As hydrologic retention time increased (to near 20 days) and water temperature increased from $10^{circ}C$ to > $20^{circ}C$ toward the end of spring, small cladocerans noticeably increased. Once phytoplankton biomass passed their peak stage in the mid-spring, a short period (one or two weeks) of relatively low phytoplankton biomass and high Secchi transparencies occurred. Grazing by the zooplankton was highest in spring, thus, it seems that high grazing activities of zooplankton grazing regulated phytoplankton dynamics in the river. The results indicate that the role of zooplankton grazing in controlling the phytoplankton biomass becomes more important during the spring when river water is relatively stagnant. |
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| Ű¿öµå |
| zooplankton grazing;phytoplankton biomass;hydrologic retention;regulated river;Nakdong River; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.36, no.4, 2003³â, pp.420-426
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200318317182027)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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