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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.36, no.4, 2003³â, pp.403-412
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´ã¼ö¼º ½Ä¹°ÇöûũſÀÇ Å©±âº° µ¿Å¿¡ ´ëÇÑ »óÇâ½Ä, ÇÏÇâ½Ä Á¶Àý°£ÀÇ »ó´ëÀû Á߿䵵 Á¶»ç: I. Å©±â±¸Á¶ÀÇ ½Ã ${cdot}$ °ø°£Àû º¯µ¿
( Relative Importance of Bottom- up vs. Top-down Controls on Size-structured Phytoplankton Dynamics in a Freshwater Ecosystem: I. Temporal and Spatial Variations of Size Structure ) |
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| Àü³² ÁÖ¾ÏÈ£¿¡¼ÀÇ ½Ä¹°Çöûũſ µ¿Å¸¦ ÆÄ¾ÇÇϱâ À§ÇØ 2003³â 2¿ùºÎÅÍ 10¿ù±îÁö ½Ä¹°Çöûũſ»ýü·® (Ŭ·Î·ÎÇÊ a)ÀÇ Å©±âº° ½Ã ${cdot}$ °ø°£Àû º¯µ¿°ú Á¦¹Ý ȯ°æ¿äÀο¡ ´ëÇØ Á¶»çÇÏ¿´´Ù. º» ³í¹®¿¡¼´Â ÁÖ¾ÏÈ£¿Í °°Àº ´ã¼öÈ£¿¡¼ ½Ä¹°ÇöûũſÀÇ Å©±â ±¸Á¶°¡ °èÀýÀû, °ø°£ÀûÀ¸·Î ¾î¶»°Ô º¯ÈÇÏ°í ±×·¯ÇÑ º¯È ¼Ó¿¡¼ ¹°¸®Àû ¿äÀεéÀÌ ¾î¶² ¿µÇâÀ» ¹ÌÄ¡´ÂÁö ȸ±ÍºÐ¼®À» ÅëÇØ ÆÄ¾ÇÇϰíÀÚ ÇÏ¿´´Ù. ½Ä¹°Çöûũſ (Ŭ·Î·ÎÇÊ a)Àº ¼¼ ±×·ì Áï, ´ëÇü (micro-size > 20 ${mu}m$), ¼ÒÇü (nano-size 3-20 ${mu}m$) ¸¶Áö¸·À¸·Î ÃʼÒÇü (pico-size, < 3 ${mu}m$)À¸·Î ±¸ºÐÇß´Ù. ¹°¸®Àû Ư¼º ÆÄ¾ÇÀ» À§ÇØ ¼ö¿Â, ±¤¼Ò¸ê°è¼ö, PAR (photosynthetically active radiation), ¼öÁß Å¹µµµîµµ µ¿½Ã¿¡ ÃøÁ¤ÇÏ¿´´Ù. ÃÖ´ëÄ¡ÀÇ Å¬·Î·ÎÇÊ a ´Â 2003³â ÇÏ·ùÁö¿ª¿¡¼´Â 4¿ù¿¡ »ó·ùÁö¿ª¿¡¼´Â 10¿ù¿¡ ¹ß»ýÇÏ¿´´Ù. ½Ä¹°ÇöûũſÀÇ ´ë¹ø¼º±â¿¡´Â ´ëºÎºÐ ¼¼Æ÷Å©±â°¡ Å« ´ëÇü (micro-size)½Ä¹°ÇöûũſÀÌ ¿ì¼¼ÇÏ¿´´Ù. ÁÖ¾ÏÈ£ÀÇ Å©±âº° ½Ä¹°ÇöûũſÀÇ º¯µ¿¿¡ ¿µÇâÀ» ¹ÌÄ¥ ¼ö ÀÖ´Â ¹°¸®Àû Ư¼ºµé¿¡ ´ëÇØ ³íÀÇÇÏ¿´´Ù. |
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| Temporal and spatial variations of size-structured phytoplankton (chlorophyll a) were investigated over an annual cycle (February-October, 2003) to elucidate phytoplankton dynamics in the Juam Reservoir, Chonnam. Physical properties were also measured to investigate the relationship between the properties and temporal and spatial variations of size structured phytoplankton using simple linear regression. Phytoplankton (chlorophyll a) were grouped into three size classes: micro-size(> 20 ${mu}m$), nano-size (3-20 ${mu}m$) and pico-size (< 3 ${mu}m$) in this study. Physical properties included water temperature, light attenuation coefficients, PAR (photosynthetically active radiation) and turbidity. Maximum chlorophyll a was observed in April, 2003 in the lower region whereas a peak of chlorophyll a developed in October, 2003 in the upper region. Large cell-sized phytoplankton (micro-size class)were dominant in the events of the chlorophyll a peaks. Potential mechanisms in the physical properties affecting the size-structured phytoplankton dynamics in the Juam Reservoir were discussed. |
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| Ű¿öµå |
| bottom-up control;top-down control;size-structured phytoplankton;Lake Juam;potential mechanism; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.36, no.4, 2003³â, pp.403-412
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200318317181994)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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