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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.31, no.1, 1998³â, pp.54-54
´ëûȣ ¼ºÃþÆÄ±«½Ã cyanobacteriaÀÇ ¼öÁ÷ºÐÆ÷ ¹× ¼¼Æ÷³» ÀÎÀÇ Á¶¼º
( Vertical distribution and phosphorus component of cyanobacteria at the end of stratification in Daechung reservoir )
¿ÀÈñ¸ñ;À̼®ÁØ;¹ÚÁ¤È£;¸ÍÁÖ¼±; »ý¸í°øÇבּ¸¼Ò ȯ°æ¹Ì»ý¹°Àü¹®¿¬±¸Unit;»ý¸í°øÇבּ¸¼Ò ȯ°æ¹Ì»ý¹°Àü¹®¿¬±¸Unit;¼­°­´ëÇб³ »ý¸í°úÇаú;¼­°­´ëÇб³ »ý¸í°úÇаú;
 
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´ëûȣ¿¡¼­ ¼ºÃþÆÄ±« ½Ã±â¿¡ ¼ö½Éº° ÀÌÈ­ÇÐÀû ¼öÁú, cyanobacteriaÀÇ ºÐÆ÷, ¼¼Æ÷³» ÀÎ fractionationÀÇ Æ¯¼ºÀ» Á¶»çÇÏ¿´´Ù. Á¶»ç½Ã±âÀÎ 9¿ù $25{sim}26$ÀÏÀº ¼ö½É¿¡ µû¸¥ ¼ö¿Â ¹× ¿ëÁ¸»ê¼ÒÀÇ ±ÕÀÏÇÑ ºÐÆ÷¸¦ ³ªÅ¸³»¾î, Ã߰迪ÀüÀÌ Ç¥ÃþÀ¸·ÎºÎÅÍ ÁøÇàµÇ¾î ¼ö¿Â¾àÃþÀÌ ÆÄ±«µÇ´Â ½Ã±â·Î ÃßÁ¤µÇ¾ú´Ù. ¼öÁÖ¿¡ ºÐÆ÷ÇÏ´Â ½Ä¹°ÇöûũſÀÇ 74%°¡ Áø±¤ÃþÀÎ ¼ö½É 4m ¹üÀ§¿¡ ºÐÆ÷ÇÏ¿´À¸¸ç, cyanobacteria ÀÎ Microcystis sp.¿Í ±ÔÁ¶·ùÀÎ Melosira sp.°¡ Àüü ½Ä¹° ÇöûũſÁß °¢°¢ 66%, 33%¸¦ Â÷ÁöÇÏ¿´´Ù. Áï, ¼ºÃþÆÄ±«¿Í ´õºÒ¾î ¿ìÁ¡Á¶·ù´Â Microcystis sp.¿¡¼­ Melosira sp. ·Î õÀ̰¡ ÁøÇàÁßÀ̾ú´Ù. ¼ö½É 20m¿¡¼­ Microcystis sp. ÀÇ ºÐÆ÷´Â ¼ºÃþÆÄ±«½Ã ¼öÁÖÀÇ È¥ÇÕ¿¡ ÀÇÇÑ À̵¿ÀÌ ÁÖ¿ä¿äÀÎÀ¸·Î ÆÇ´ÜµÇ¾ú´Ù. ¼ºÃþÆÄ±« ½Ã±â¿¡ nucleotide-PÀÇ ³óµµ°¡ ³·¾ÆÁø °ÍÀº Microcystis sp.°¡ ±Þ¼ÓÇÑ È¯°æº¯È­ ÇÏ¿¡¼­ »ýÁ¸À» À§ÇØ ¼¼Æ÷³»¿¡ ÃàÀûµÈ ¿¡³ÊÁö¸¦ ¼ÒºñÇϱ⠶§¹®À¸·Î »ç·áµÈ´Ù. ¼ºÃþÆÄ±« ½Ã±â¿¡ Microcystis sp.ÀÇ ¼öÁ÷ºÐÆ÷´Â ÁÖ·Î ¼öÁÖÀÇ È¥ÇÕ¿¡ ±âÀÎÇϸç, ¼¼Æ÷³» ź¼öÈ­¹°ÀÌ ballast·Î ÀÛ¿ëÇÏ¿© ºÎ·ÂÀ» Á¶ÀýÇϱ⠶§¹®À¸·Î ÃßÁ¤µÈ´Ù.
Water quality, phytoplankton distribution and characteristics of cellular phosphorus fractionation were investigated at the end of summer stratification in Daechung Reservoir. Water samples were collected and analysed from different depths at 4 hour intervals for a day on September 25, 1995. Water temperature and dissolved oxygen showed a tendency of even distribution with depth, indicating the loss of stratification by fall turnover. The identification of phytoplankton community, confining 74% of the total phytoplankton within euphotic zone, a depth of 4 m from the surface, revealed that Microcystis sp., a cyanobacterium and Melosira sp., a diatom species occupied 66% and 33% of total phytoplankton respectively on the basis of cell number. Microcystis sp., the dominant species, thus, was gradually replaced by Melosira sp. concurrently with the loss of stratification. The distribution of Microcystis sp. down to a depth of 20 m seemed to be caused mainly by the circulation in water column. The main phosphorus components of Microcystis sp. were sugar-P and ortho-P, as well as nucleotide-P which could be used as an energy source to sustain the species at the time of severe environmental impact. It seems that Microcystis sp. could distribute to deep depths in water column by changing cellular carbohydrate content acting as a ballast.
 
Ű¿öµå
cyanobacteria;loss of stratification;phosphorus fractionation;vertical distribution;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.31, no.1, 1998³â, pp.54-54
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199810102424387)
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