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Çѱ¹È¯°æ»ý¹°ÇÐȸ / v.26, no.4, 2008³â, pp.292-302
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( Analysis of Trophic Structures and Energy Flows in Aquatic Ecosystem of the Lower Reaches of the Nakdong River ) |
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| º» ¿¬±¸´Â Ecopath ¸ðµ¨À» ÀÌ¿ëÇÏ¿© À¯¼ö»ýŰèÀÎ ³«µ¿° ÇÏ·ù »ýŰèÀÇ ¿µ¾ç±¸Á¶¿Í ¿¡³ÊÁö È帧À» ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù. À̸¦ À§ÇØ 2007³â °¥¼ö±â(5¿ù)¿Í dz¼ö±â(8¿ù)¿¡ ³«µ¿° ÇÏ·ù »ï¶ûÁø ÀÏ´ëÀÇ 6°³ ÁöÁ¡¿¡¼ Á¶»ç¸¦ ½Ç½ÃÇÏ¿´À¸¸ç, ¾î·ùÀÇ °¢ ¾îÁ¾º° ¹Ðµµ¿Í ÀÚ¿ø·® ÀڷḦ À§ÇØ 2007³â 3¿ù¿¡¼ 11¿ù±îÁö ¸Å´Þ 2ȸ¾¿ Á¶»ç¸¦ ½Ç½ÃÇÏ¿´´Ù. ³«µ¿° ÇÏ·ù »ýŰè´Â ¼ö¿ÂÀÌ $20.9sim31.4^{circ}C$, Àü±âÀüµµµµ $135sim364{mu}s;cm^{-1}$, ¿ëÁ¸»ê¼Ò $9.0sim10.5mg;L^{-1}$, pH´Â 10.4$sim$10.7, TOC 2.3$sim$2.7 mg L$^{-1}$, DOC 2.2$sim$2.6 mg L$^{-1}$, ¼ö½É 0.5$sim$9.0 m, Åõ¸íµµ 0.3$sim$0.5 mµîÀÇ ¹üÀ§¸¦ º¸ÀÌ´Â °ÍÀ¸·Î Á¶»çµÇ¾ú´Ù. ³«µ¿° ÇÏ·ù »ýŰè´Â Å©°Ô 3´Ü°è Áï, »ý»êÀÚ¿Í 1Â÷ ¼ÒºñÀÚ, 2Â÷ ¼ÒºñÀÚ·Î ³ª´©¾îÁö´Â ¿µ¾ç´Ü°è¸¦ º¸¿´´Ù. »ý»êÀÚ¿¡ ÇØ´çÇÏ´Â »ý¹°±ºÀº À¯±âÆÐ¼³¹°, ½Ä¹°Çöûũſ, ´ëÇü¼ö»ý½Ä¹°À̾ú°í, 1Â÷ ¼ÒºñÀÚ´Â µ¿¹°Çöûũſ, Àú¼µ¿¹°, À×¾î, ´©Ä¡, ±âŸ¾î·ù µîÀ̾úÀ¸¸ç, 2Â÷ ¼ÒºñÀÚ´Â ¹è½º¿´´Ù. ³«µ¿° ÇÏ·ù »ýŰèÀÇ ÃÑ¿¡³ÊÁö·®Àº 2.7 kg m$^{-2}$·Î ³ªÅ¸³µÀ¸¸ç, 52.0%´Â ¼·½ÄÀ¸·Î, 9.1%´Â ÀÌÃâ, 18.0%´Â È£Èí, 20.9%´Â À¯±â¼â¼³¹°·Î ÀüȯµÇ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¶ÇÇÑ, È¥ÇÕ¿µ¾ç¿µÇâ(MTI)°á°ú ÃÖ°íÆ÷½ÄÀÚ·Î ÃßÁ¤µÈ ¹è½ºÀÇ »ýü·® Áõ°¨Àº ¹è½º¿Í ±âŸ ¾î·ù¿¡°Ô´Â À½ÀÇ È¿°ú¸¦, ´©Ä¡¿Í À×¾î, Àú¼µ¿¹°, µ¿¹°Çöûũſ, ½Ä¹°Çöûũſ µî¿¡°Ô´Â ¾çÀÇ È¿°ú¸¦ Á÷ °£Á¢ÀûÀ¸·Î ¹ÌÄ¡´Â °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç, °¢ ±×·ìÀÇ »ýü·®Áõ°¡´Â °¢ »ý¹°±×·ìº° »ýü·®À» °¨¼Ò½ÃŰ´Â À½ÀÇ È¿°ú¸¦ º¸ÀÌ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. |
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| The purpose of this study was to analyze the trophic structures and the energy flows in the lower reaches of the Nakdong River using the Ecopath model (Walter et al., 1997). The sampling and analyses were carried out at 6 sampling sites of the lower reaches of the Nakdong River on May and November in 2007. Total of 9 groups detritus, macrophytes, phytoplankton, zooplankton, zoobenthos, Cyprinus carpio, Hemibarbus labeo, Micropterus salmoides and other fishes were considered to assess the trophic relationship, energy flows and interactions among them in the study. As a result, it was concluded that the lower reaches of the Nakdong River was consisted of producers (Detritus, Macrophytes, Phytoplankton), primary consumers (Zooplankton, Zoobenthos, Cyprinus carpio, Hemibarbus labeo, Other fishes) and secondary consumer (Micropterus salmoides). The total system throughput was estimated at 2.7 kg m$^{-2}$ year$^{-1}$ including a consumption of 52%, exports of 9.1%, respiratory flows of 18.0% and flows into detritus of 20.9%. MTI (mixed trophic impacts) analysis demonstrated that Pseudobagrus fulvidraco had positive impact on Cyprinus carpio, Carassius cuvieri and Carassius auratus. On the other hand, other fishes had negative impact on Cyprinus carpio, Carassius cuvieri and Carassius auratus. Also, all the functional groups except detritus had a negative impact on themselves. |
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| Ű¿öµå |
| Ecopath model;energy flows;total system throughput;trophic relationship; |
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ȯ°æ»ý¹° / v.26, no.4, 2008³â, pp.292-302
Çѱ¹È¯°æ»ý¹°ÇÐȸ
ISSN : 1226-9999
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200820258463193)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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