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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.34, no.4, 2001³â, pp.298-309
½Ä¹°Çöûũſ¿¡ ´ëÇÑ ´ã¼ö»ê ÆÐ·ù (ÂüÀçø)ÀÇ ¼·½ÄÈ¿°ú
( Filter-Feeding Effect of a Freshwater Bivalve (Corbicula leana PRIME) on Phytoplankton )
±èÈ£¼·;½ÅÀç±â;Ȳ¼øÁø; °Ç±¹´ëÇб³ Áö¿ª»ýŽýºÅÛ°øÇаú;°Ç±¹´ëÇб³ Áö¿ª»ýŽýºÅÛ°øÇаú;°Ç±¹´ëÇб³ Áö¿ª»ýŽýºÅÛ°øÇаú;
 
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¿µ¾ç»óŰ¡ ´Ù¸¥ µÎ È£¼ö¿¡¼­ ½Ä¹°Çöûũſ ±ºÁý¿¡ ´ëÇÑ ´ã¼ö»ê ÆÐ·ùÀÇ ¼·½Ä È¿°ú¸¦ 2000³â 6¿ùºÎÅÍ 9¿ù±îÁö Á¶»çÇÏ¿´´Ù. ½ÇÇèÀº 10 l ÇÃ¶ó½ºÆ½ ¿ë±â¿¡ ÆÐ·ù¸¦ ÅõÀÔÇÏÁö ¾Ê´Â °Í°ú ÅõÀÔÇÑ °ÍÀ¸·Î 󸮵Ǿú°í 2¹Ýº¹À¸·Î ¼öÇàµÇ¾ú´Ù. ¼öü ³» Á¸ÀçÇÏ´Â ÃÑÁú¼Ò¿Í ÃÑÀÎ ±×¸®°í ¿±·Ï¼Ò a ³óµµ´Â ¼Ò¾çÈ£¿¡ ºñÇØ Àϰ¨È£¿¡¼­ ¿ùµîÈ÷ ³ô¾Ò´Ù(p<0.01). Àϰ¨È£¿¡¼­ ¿ìÁ¡ÇÑ ½Ä¹°Çöûũſ ±ºÁýÀº °ÅÀÇ ´ëºÎºÐ ³²Á¶·ù ¿´´ø ¹Ý¸é ¼Ò¾çÈ£¿¡¼­´Â Æí¸ðÁ¶·ù°¡ ¿ìÁ¡ÇÏ¿´´Ù. ÆÐ·ù°¡ ÅõÀÔµÈ ¿ë±â ³» ÃÑ ½Ä¹°ÇöûũſÀÇ °¨¼ÒÀ²Àº ¼Ò¾çÈ£¿Í Àϰ¨È£¿¡¼­ °¢°¢ $1.70{sim}7.39;d^{-1}$±×¸®°í $0.38{sim}1.64;d^{-1}$ÀÇ ¹üÀ§¿´´Ù. ½Ã°£¿¡ µû¸¥ ½Ä¹°ÇöûũſÀÇ º¯È­¸¦ ¹ÙÅÁÀ¸·Î ÇÑ ÆÐ·ùÀÇ À¯±â¹°ÇÔ·®¿¡ µû¸¥ ¿©°úÀ²(FR; $ml;mgAFDW^{1};h^{-1}$)Àº Àϰ¨È£(0.24${sim}$0.88)¿¡¼­ º¸´Ù ¼Ò¾çÈ£(1.70${sim}$3.06)¿¡¼­ ³ô¾Ò´Ù. Á¶°³ °³Ã¼ ´ç ¿©°úÀ²($l;mussel^{-1};day^{-1}$)Àº ¼Ò¾çÈ£¿¡¼­ 1.6${sim}$7.8 l,Àϰ¨È£¿¡¼­ 1.7${sim}$3.0 l·Î ³ªÅ¸³µ´Ù(p<0.05).»ý¹°·®¿¡ ´ëÇÑ C-flux·Î °í·ÁÇÒ ¶§, Corbicula leana´Â ¼Ò¾çÈ£ÀÇ °æ¿ì ½Ä¹°Çöûũſ ÇöÁ¸·®ÀÇ 0.8${sim}$4.4¹è¸¦, Àϰ¨È£¿¡¼­´Â 0.4${sim}$l.6¹è¸¦ ¼·½ÄÇÏ´Â °ÍÀ¸·Î Á¶»çµÇ¾ú´Ù. ÆÐ·ùÀÇ ¼·½Ä Ȱµ¿À¸·Î ÀÎÇØ ÀÎÀÇ ³óµµ°¡Á¶°³°¡ ¾ø´Â ¿ë±â¿¡ ºñÇØ 30${sim}$50%Áõ°¡ÇÏ¿´´Ù. º» ¿¬±¸¿¡¼­ ³ªÅ¸³­ °á°úµéÀº ÂüÀçø (Corbicula leana)ÀÇ ¿©°ú ¼·½Ä Àßµ¿ÀÌ ½Ä¹°ÇöûũſÀÇ ¹Ðµµ¿Í ±ºÁý±¸Á¶¿¡ µû¶ó Â÷À̰¡ ÀÖÀ½À» Á¦½ÃÇÑ´Ù. ¶ÇÇÑ, ¸Å¿ì ºÎ¿µ¾çÈ­µÈ È£¼ö¿¡¼­µµ ÂüÀçøÀº ³ôÀº ¿©°úÀ²À» ³ªÅ¸³¿À¸·Î½á ±¹³» ¼Ò±Ô¸ðÀÇ ºÎ¿µ¾çÈ­µÈ È£¼ö¿¡¼­ ¼öÁú°ü¸®¿¡ ´ã¼öÆÐ·ù¸¦ ÀÌ¿ëÇÒ ¼ö ÀÖ´Â °¡´É¼ºÀ» Á¦½ÃÇÑ´Ù.
The purpose of this study was to evaluate the filtering-feeding effect of a freshwater mussel (Corbicula leana) on the phytoplankton communities in two lakes with different trophic conditions between June and September, 2000. Manipulation experiments were conducted with two treatments (the control and mussel addition), and each established in duplicate 10 l chambers. Both ambient nutrient (TN, TP) and chlorophyll-a concentrations were significantly (p<0.01) higher in Lake Ilgam than Lake Soyang. Cyanophytes (Microcystis, Oscillatoria, Lyngbya and Dactylococcopis) consistently dominated algal community in Lake llgam, while flagellated algae (Dinobryon divergence, Mallomonas, Rhodomonas) and cyanophytes (Microcystis)dominated in Lake Soyang. The net exponential death rate ($R;=;day^{-1}$) of total phytoplankton in the mussel treatment ranged $1.70{sim}7.39$ and $0.38{sim}1.64$ in Lakes Soyang and Ilgam, respectively. Mean filtering rate standardized by mussel AFDW ($ml;mgAFDW^{1};h^{-1}$) was much higher in Lake Soyang ($1.70{sim}3.06$) than in Lake Ilgam($0.24{sim}0.88$0.24~o.88). Estimating FR per mussel, 1 mussel filtered $1.6{sim}7.8;l$ per day and $1.7{sim}3.0;l$ per day in Lakes Soyang and Ilgam, respectively. Based on tile C-flux tobiomass ratio, Corbicula leana consumed $0.8{sim}4.4$ fold of phytoplankton standing stock in Lake Soyang, and $0.4{sim}1.6$ fold in Lake Ilgam per day. Mussel feeding resulted in increase of SRP concentration by $30{sim}50%$, compared with the control. The results of this study suggest that filter-feeding activity of Corbicula leana varies depending on the phytoplankton density and community composition. The high seston consumption rate of Corsicuja Jeaua even in a eutrophic lake suggests that biomanipulation approach using filter-feeding mussels can be used far wate rquality management in small eutrophic reservoirs.
 
Ű¿öµå
Filter feeding;Freshwater bivalve;Phytoplankton;C-flux;Nutrient recycling;Water quality management;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.34, no.4, 2001³â, pp.298-309
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200118317178724)
¾ð¾î : ¿µ¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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